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1.
[Pb0.961La0.012Ba0.015Sr0.012][Zr0.53Ti0.47]0.967-(h/2)Nb0.02Zn0.01MnhO3 (PLBSZZMNT) nano-ceramics where h = 0, 0.5. 1 and 1.5 mol% fabricated through solid state reaction method has been investigated
for phase formation, microstructure, density, dielectric and piezoelectric properties. X-ray diffraction studies indicated
that all the samples exhibited a single-phase perovskite tetragonal structure which had strongly intensified due to the acceptor
Mn content increment in the series. Our investigation with reference to isovalent (Ba2+ and Sr2+) on the A-site, pentavalent donor (Nb5+) and acceptor (Zn2+ and Mn4+) dopants on the B-site in PLZT perovskite with the stoichiometric compositional formulation tailored for dielectric and piezoelectric
properties has been clearly explained. As Mn concentration increased, the grain growth enhanced, and the inter-diffusion between
multiple ions promoted densification in the PLBSZZMNT nano-ceramics. TEM studies revealed an average particle size ranging
from 20 to 72 nm. Dielectric characterization revealed that the εRT enhanced till 1.5 mol% Mn (2946) while the Curie temperature and dielectric loss at room temperature (Tc and TanδRT) decreased, respectively. Mn doping in PLBSZZNT induced the piezoelectric parameters (kp = 0.567) and (d33 = 486 pC/N) till 1.5 mol% Mn. Thus, 1.5 mol% Mn modified PLBSZZNT exhibits optimum dielectric and piezoelectric properties,
which are suitable for possible sensor and actuator applications. 相似文献
2.
K. Chandramouli G. Srinivas Reddy Koduri Ramam 《Journal of Materials Science: Materials in Electronics》2009,20(2):132-138
The effect of A-site substitution of Ce3+ in tungsten bronze structured PBN ceramics with the general formula, Pb(x − 3y/2)Ce
y
Ba(1 − x)Nb2O6 and the stoichiometric chemical formula, Pb(0.65 − 3y/2)Ce
y
Ba0.35Nb2O6, where y = 0, 2, 4, 6, 8 and 10 mol% ceramic compositions synthesized through solid state reaction method are reported. The X-ray
diffraction studies exhibited the presence of an orthorhombic phase, and its intensity increased with the increasing Ce3+ content up to y = 6 mol% or A3 composition. The lattice parameters, unit cell volume and density as a function of Ce3+ concentration are discussed. It is observed that increasing Ce3+ content in A-site influenced the dielectric properties. The optimum dielectric properties of room temperature dielectric
constant (εRT) and dielectric maximum
() are observed in y = 6 mol% or A3 composition while Curie temperature (T
c) and dielectric loss (tan δ) constantly decreased from undoped to y = 10 mol%, and thus A3 composition or 6 mol% Ce modified tungsten bronze structured-PBN could be suitable for capacitor applications. 相似文献
3.
New lead-free ceramics (Bi0.5Na0.5)1−x−yBax(Yb0.5Na0.5)yTiO3 (x = 0.02–0.10 and y = 0–0.04) have been prepared by an ordinary sintering technique and their structure and piezoelectric properties have been
studied. X-ray diffraction shows that Ba2+ and Yb3+ diffuse into the Bi0.5Na0.5TiO3 lattices to form a solid solution with a pure perovskite structure and a morphotropic phase boundary (MPB) between rhombohedral
and tetragonal phases is formed at 0.04 < x < 0.10. The partial substitutions of Ba2+ and Yb3+ for A-site ions of Bi0.5Na0.5TiO3 decrease effectively the coercive field E
c and improve significantly the remanent polarization P
r. The ceramics with x = 0.06 and y = 0–0.02 situate within the MPB and possess the lower E
c and larger P
r, and thus exhibit optimum piezoelectric properties: d
33 = 155–171 pC/N and k
p = 29.2–36.7%. The temperature dependences of the dielectric and ferroelectric properties suggest that the ceramics may contain
both the polar and non-polar regions at temperatures near/above T
d. 相似文献
4.
Bin Shao Jinhao Qiu Kongjun Zhu Xuming Pang Qinghua Meng 《Journal of Materials Science: Materials in Electronics》2012,23(4):846-850
Lead-free (K0.4425Na0.52Li0.0375)(Nb0.93−x
Sb0.07Ta
x
)O3 (abbreviated as KNLNST
x
) piezoelectric ceramics with x = 0.045–0.075 have been prepared by an ordinary sintering technique with sintering temperature at 1,120 °C. The results of
X-ray diffraction reveal that Ta5+ has diffused into the perovskite lattice to form a solid solution. The grain growth of the ceramics was inhibited by substituting
Ta5+ for Nb5+. It has been shown that the substitution of Ta decreases Curie temperature T
C and orthorhombic-tetragonal phase transition temperature T
O-T. Besides, the dependence of the ceramics with different Ta content on the dielectric, piezoelectric and ferroelectric properties
has been investigated. The results indicate that Ta substitution provides “soft” piezoelectric characteristics, owing to improvements
in d
33, k
p and ε
r and a decease in Q
m. For the ceramics with x = 0.06, the piezoelectric coefficient d
33 becomes maximum at a value of 270 pC/N, while the other electrical properties remain reasonably high: dielectric constant
ε
r = 1,577, planar mode electromechanical coupling factors k
p = 0.4, Curie temperature T
C = 252 °C and the remanent polarization P
r = 16.03 μC/cm2. These results show that (K, Na, Li) (Nb, Sb)O3 ceramics with small amount of Ta (x <8 mol%) are good lead-free piezoelectric ceramic. 相似文献
5.
The structural, electrical and magnetic behavior of Sr0.5Ba0.5−xCexFe12−yNiyO19 (where x = 0.00–0.10; y = 0.00–1.00) hexaferrite nanomaterials are reported in this paper. The structural analysis indicates that the Ce–Ni doped Sr–Ba M-type hexaferrite samples synthesized by the co-precipitation method are stoichiometric, single magnetoplumbite phase with crystallite sizes in the range of 35–48 nm. The dc-electrical resistivity of the pure Sr–Ba hexaferrite is enhanced to almost 102 times by doping with Ce–Ni contents of x = 0.06; y = 0.60. The dielectric constant and dielectric loss tangent decrease to values 14 and <0.2, respectively, by increasing the frequency up to 1 MHz. Small relaxation peaks at frequencies >105 Hz are observed for the samples with Ce content of x > 0.06. The values of saturation magnetization increase from 66.32 to 84.33 emu/g and remanance magnetization from 42.64 to 56.01 emu/g but coercivity decreases from 2.85 to 1.59 kOe by substitution of Ce–Ni. Sharp ferri-paramagnetic transition is observed in the samples, which is confirmed by DSC results. Ce–Ni substitution acts to reduce the electron-hopping between Fe2+/Fe3+ ions and also improves the magnetic properties. These characteristics are desirable for their possible use in microwave and chip devices. 相似文献
6.
Two newly synthesised Sr0.50SbFe(PO4)3 [Sr0.5.] and SrSb0.50Fe1.50(PO4)3 [Sr.] phases were obtained by conventional solid-state reaction techniques at 1000 °C in air atmosphere. Their crystallographic
structures were determined at room temperature from X-ray powder diffraction (XRPD) data using the Rietveld analysis. Both
compounds belong to the Nasicon structural family. [Sr0.5.] and [Sr.] crystallise in rhombohedral system with
\textR[`3] {\text{R}}\overline{3} and
\textR[`3] \textc {\text{R}}\overline{3} {\text{c}} space group, respectively. Hexagonal cell parameters for [Sr0.5.] and [Sr.] are: a = 8.227(1) ?, c = 22.767(2) ? and a = 8.339(1) ?, c = 22.704(2) ?, respectively. Sr2+ and vacancies in {[Sr0.50]3a[□0.50]3b}M1SbFe(PO4)3 are practically ordered within the two positions, 3a and 3b, of M1 sites. Structure refinements show also an ordered distribution
of Sb5+ and Fe3+ ions within the Nasicon framework. Within the structure, each Sr(3a)O6 octahedron shares two faces with two Fe3+O6 octahedra and each vacancy (□(3b)O6) site is located between two Sb5+O6 octahedra. In [Sr]M1Sb0.50Fe1.50(PO4)3 compound, all M1 sites are occupied by Sr2+ and the Sb5+ and Fe3+ ions are randomly distributed within the Nasicon framework. A Raman and infrared spectroscopic study was used to obtain further
structural information about the nature of bonding in both selected compositions. 相似文献
7.
T. J. Shinde A. B. Gadkari P. N. Vasambekar 《Journal of Materials Science: Materials in Electronics》2010,21(2):120-124
Compositions having general formula Ni0.6Zn0.4Nd
y
Fe2−y
O4 (where y = 0, 0.01, 0.02 and 0.03) were prepared by oxalate co-precipitation method from high purity sulphates. The samples were characterized
by XRD, IR and SEM techniques. X-ray diffraction measurements confirmed the formation of single phase cubic spinel structure.
Lattice constant increases with rise in Nd3+ content and obeys Vegard’s law. Crystallite size of the samples lies in the range 29.98–31.15 nm. The IR spectra shows two
strong absorption bands in the frequency range 400–600 cm−1. Further, it shows that Nd3+ occupies B-site. SEM studies show that the grain size of the samples decreases with increase in Nd3+ content. Saturation magnetization of Nd3+ substituted Ni–Zn ferrites is higher than unsubstituted ferrite. 相似文献
8.
Soda alumina borosilicate glasses of composition (24-y)Na2O·yAl2O3·14B2O3·37SiO2·25Fe2O3, y = 8, 12, 14, 16 mol%, were melted using Fe2O3 as raw material. Besides, samples with y = 12 and Fe2O3 concentrations of 14.32, 17.8, and 25.0 mol% were prepared from FeC2O4·2H2O as raw material. The X-ray diffraction analyses showed the presence of magnetite for the samples from all the investigated
compositions. Transmission electron microscopy (TEM) evidenced that all the samples are phase separated and droplets in the
diameter range 100–1000 nm, enriched in iron, are formed. Inside these droplets, numerous small magnetite particles, with
size in the 25–40 nm interval, are crystallized. 相似文献
9.
S. Kanagesan S. Jesurani R. Velmurugan T. Kalaivani 《Journal of Materials Science: Materials in Electronics》2012,23(4):952-955
M-type Hexaferrites B0.5Sr0.5Fe12−2x
Ni
x
Zr
x
O19 were synthesized and investigated. The XRD patterns show single phase of the magnetoplumbite barium strontium ferrite and
no other phases were present. The samples exhibit well defined crystallization; all of them are hexagonal platelet grains.
As the substitution level increased from x = 0.2 to 0.8 mol%, the grains are agglomerated and the average diameter increased. This suggests that Ni–Zr substitution
increases the grain size, as observed in the FE-SEM micrographs. The results of magnetic measurement revealed that Ms of barium strontium hexaferrite increased when the value of x increased from 0 to 0.4 mol% and then decreased with the increasing Ni–Zr content. The Hc decreases remarkably with increasing Ni and Zr ions content. Hard magnetic material is converted into soft magnetic material
when the substitution level is increased from 0.2 to 0.8 mol%. In particular, Ba0.5Sr0.5Fe12−2x
Ni
x
Zr
x
O19 with x = 0.2, 0.4, 0.6, 0.8 mol% has suitable magnetic characteristics with particle size small enough for high-density magnetic
recording applications. 相似文献
10.
T. J. Shinde A. B. Gadkari P. N. Vasambekar 《Journal of Materials Science: Materials in Electronics》2012,23(3):697-705
Ferrite samples with general formula Ni1−xZnxNdyFe2−yO4 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1; y = 0.01, 0.02 and 0.03) were synthesized by oxalate co-precipitation technique. The X-ray
diffraction study confirms the formation of single-phase cubic spinel structure. The lattice constant of the samples increases
with increase in zinc content and obeys Vegard’s law. On Nd3+ substitution lattice constant of the samples slightly increases except zinc ferrite. The frequency dependence of the dielectric
constant, dielectric loss and AC conductivity of the samples were determined in the frequency range from 20 Hz to 1 MHz at
room temperature. The experimental results reveal that the dielectric constant and dielectric loss decreases where as AC electrical
conductivity increases with increase in frequency. The dielectric loss increases with increase in zinc content whereas it
decreases with increase in Nd3+ content. There is no appreciable change in permittivity of the samples with increase in Nd3+ content. Permeability of all the samples increases with increase in Nd3+ content. Because of lower dielectric loss, Nd3+ substituted Ni–Zn ferrites are useful in electronic devices. 相似文献
11.
Nanoparticles Y3−x−y
Ce
x
Gd
y
Fe5O12 (x = 0–0.1, y = 0–1.0) were fabricated by a sol–gel method. The crystalline structures and magnetic properties of samples were investigated
by X-ray diffraction (XRD), scanning probe microscopy (SPM), X-ray photoelectron spectroscopy (XPS), and vibrating sample
magnetometer (VSM). The XRD patterns of Y3−x−y
Ce
x
Dy
y
Fe5O12 have only peaks of the garnet structure and the mean size range from 42 nm to 65 nm. The particle’s size observed for all
the samples analyzed by SPM are in good agreement with these data from XRD. The particle’s size ranged from 50 nm to 70 nm,
at the same time, there are small amount of reunited particles can be observed. XPS for Y2.9Ce0.1Fe5O12 gives two peaks at 885.15 and 905.15 eV attributing to Ce3+ 3d5/2 and 3d3/2, respectively. The results confirm the valence state of Ce atoms being +3. Results of VSM show that the saturation magnetization
is increased with increasing Ce content (x) and is decreased with increasing the Gd concentration (y) in a linear manner. The saturation magnetization is increased with increasing the particle’s size.
相似文献
Hua YangEmail: |
12.
H. L. Shi H. X. Yang H. F. Tian C. Ma J. B. Lu Z. W. Wang J. Q. Li 《Journal of Superconductivity and Novel Magnetism》2010,23(5):749-755
The Ca1−x
Sr
x
Fe2As2 (0≤x≤1) and Ca0.5Sr0.5 Fe2−y
Co
y
As2 (0≤y≤0.6) materials were prepared by a solid state reaction method. X-ray diffraction analysis shows that the lattice parameters
of Ca1−x
Sr
x
Fe2As2 decrease continuously with increasing Ca content. Resistivity measurements reveal that the Ca/Sr ratio has a visible influence
on the resistivity anomaly associated with the spin-density-wave (SDW) instability. Experimental measurements on Ca0.5Sr0.5Fe2−y
Co
y
As2 show clear superconducting transitions for Co in range of 0.26≤y≤0.43; the highest critical transition temperature is found to be at about 17 K. Transmission electron microscopy (TEM) investigations
on the superconducting Ca0.5Sr0.5Fe2−y
Co
y
As2 samples reveal visible inhomogeneous distribution of Sr and Ca elements, which could result in structural distortions and
broaden superconducting transitions as observed in our experiments. 相似文献
13.
In this study, bulk ceramics with general formula Bi1−ySryFe(1−y)(1−x)Sc(1−y)xTiyO3 (x = 0-0.2, y = 0.1-0.3 mol%) were prepared by traditional solid-state reaction method. As a comparison, bulk BiFeO3 (BF) was also sintered by rapid sintering method. Their structural, magnetic, dielectric properties were investigated. X-ray diffraction analysis indicated that apart from a small amount of secondary phase detected in BF, all other samples crystallized in pure perovskite structure and maintained original R3c space group. The room temperature M-H curves were obtained. While BF had a coercive magnetic field (Hc) of 150 Oe, Bi1−ySryFe1−yTiyO3 solid solutions had a much larger value (for y = 0.1, 0.2, 0.3, Hc were 4537, 5230 and 3578 Oe, respectively). Sc3+ substitution decreased the Hc values of these solid solutions remarkably, and resulted in soft magnetic properties, as well as a decrease of the dielectric loss. At 1 MHz, the tan δ of Bi0.7Sr0.3Fe0.7(1−x)Sc0.7xTi0.3O3 with x = 0.05, 0.1, 0.15, 0.2 were 0.1545, 0.1078, 0.1046 and 0.1701, respectively. 相似文献
14.
Low dielectric loss and enhanced tunable properties of Cr-doped barium strontium titanate solid solution 总被引:1,自引:0,他引:1
Ruxing Li Jinrong Cheng Zhongyan Meng Wenbiao Wu 《Journal of Materials Science: Materials in Electronics》2006,17(8):587-591
The dielectric response and tunable properties of Cr-doped Ba0.6Sr0.4TiO3 solid solution were investigated. The XRD patterns revealed that all of the doped specimens are cubic perovskite phase, and
the SEM micrographs showed that the grain size increases with the increase of Cr content below 0.6 mol%. The dielectric frequency
spectra of the doped BST solid solution showed that an additional relaxation of the doped specimens is observed at frequencies
above 10 MHz. Both of the tunability and dissipation factor were improved by doping with Cr concentration lower than 1.0 mol%
compared with undoped material. The 0.6 mol% Cr-doped specimen reveals a maximum tunability and figure of merit of 23.3% and
518.3, respectively. Extremely low dissipation factor in order of 5 × 10−4 is found for 0.4–0.6 mol% Cr-doped BST solid solution. The dramatically low dissipation factor of the specimen is explained
by the reducing of Cr3+ to Cr2+ and the acceptor action of Cr3+ and Cr2+ which neutralized the donor action of oxygen vacancies. 相似文献
15.
Xuming Pang Jinhao Qiu Kongjun Zhu Jianzhou Du 《Journal of Materials Science: Materials in Electronics》2012,23(5):1083-1086
K0.5Na0.5NbO3–x ZnO (KNN–xZn) lead-free ceramics have been prepared using the conventional sintering technique and the effects of ZnO addition on the
phase structure and piezoelectric properties of the ceramics have been studied. Our results reveal that a small amount of
ZnO can improve the density of the ceramics effectively. Because of the high density and ZnO doping effects, the piezoelectric
and dielectric properties of the ceramics are improved considerably. The good piezoelectric and dielectric properties of d
33 = 114 pC/N, k
p = 0.36, ε
r = 395, and Q
m = 68 were obtained for the KNN ceramics doped with 1 mol% ZnO. Therefore, the KNN-1.0 mol%Zn ceramics is a good candidate
for lead-free piezoelectric application. 相似文献
16.
Klaus Reichmann Elmar Völkl Martin Ahrens Jürgen Fleig Jürgen Vötsch 《Journal of Materials Science》2010,45(6):1473-1477
The influence of SrO–WO3 additive on the piezoelectric properties and electric conductivity of lead zirconate–titanate (PZT) near the morphotropic
phase boundary was investigated. Starting from the composition 0.995 Pb(Zr0.525Ti0.475)O3 + 0.015 SrO + 0.005 WO3 (corresponding to 0.5 mol% of Sr3WO6) the fraction of WO3 was increased until Sr:W = 1:1. These samples were compared to a set of samples of PZT with WO3 addition but without SrO. Sr3WO6 has pseudocubic K2NaAlF6 structure with part of the strontium being octahedrally coordinated. In a solid solution with PZT this opens the possibility
of realizing Sr on a B-site adjacent to a B-site occupied by W. Piezoelectric properties were measured on sintered disc samples
under high field conditions. Impedance spectroscopy was used to investigate the conductivity and dielectric properties of
the ceramics at various temperatures. The combined addition of SrO and WO3 increases the piezoelectric strain compared to samples of PZT with WO3 addition only. The results in polarization and conductivity indicate that the donor effect of WO3 is counteracted by the addition of SrO. 相似文献
17.
M. M. Rashad I. A. Ibrahim 《Journal of Materials Science: Materials in Electronics》2011,22(12):1796-1803
M-type hexaferrites; barium hexaferrite BaFe12O19 and strontium hexaferrite SrFe12O19 powders have been successfully prepared via the co-precipitation method using 5 M sodium carbonate solution as alkali. Effects
of the molar ratio and the annealing temperature on the crystal structure, crystallite size, microstructure and the magnetic
properties of the produced powders were systematically studied. The results indicated that a single phase of barium hexaferrite
was obtained at Fe3+/Ba2+ molar ratio 12 annealed at 800–1,200 °C for 2 h whereas the orthorhombic barium iron oxide BaFe2O4 phase was formed as a impurity phase with barium M-type ferrite at Fe3+/Ba2+ molar ratio 8. On the other hand, a single phase of strontium hexaferrite was produced with the Fe3+/Sr2+ molar ratio to 12 at the different annealing temperatures from 800 to 1,200 °C for 2 h whereas the orthorhombic strontium
iron oxide Sr4Fe6O13 phase was formed as a secondary phase with SrFe12O19 phase at Fe3+/Sr2+ molar ratio of 9.23. The crystallite sizes of the produced nanopowders were increased with increasing the annealing temperature
and the molar ratios. The microstructure of the produced single phase M-type ferrites powders displayed as a hexagonal-platelet
like structure. A saturation magnetization (53.8 emu/g) was achieved for the pure barium hexaferrite phase formed at low temperature
800 °C for 2 h. On the other hand, a higher saturation magnetization value (M
s = 85.4 emu/g) was obtained for the strontium hexaferrite powders from the precipitated precursors synthesized at Fe3+/Sr2+ molar ratio 12 and thermally treated at 1,000 °C for 2 h. 相似文献
18.
Changrong Zhou Xinyu Liu Weizhou Li Changlai Yuan Guohua Chen 《Journal of Materials Science》2009,44(14):3833-3840
Lead-free piezoelectric ceramics (1 − x − y)Bi0.5Na0.5TiO3–xBi0.5K0.5TiO3–yBiCoO3 (x = 0.12–0.24, y = 0–0.04) have been fabricated by a conventional solid-state reaction method, and their structure and electrical properties
have been investigated. The XRD analysis shows that samples with y ≤ 0.03 exhibit a pure perovskite phase and very weak impurity reflections can be detected in the sample with y = 0.04. With x increasing from 0.12 to 0.24 and y increasing from 0 to 0.04, the ceramics transform gradually from a rhombohedral phase to a tetragonal phase and rhombohedral–tetragonal
phase coexistence to a pseudocubic phase, respectively. The morphotropic phase boundary (MPB) of the system between rhombohedral
and tetragonal locates in the range of x = 0.18–0.21, y = 0–0.03. The ceramics near the composition of the MPB have good performances with piezoelectric constant d
33 = 156 pC/N and electromechanical coupling factor k
p = 0.34 at x = 0.21 and y = 0.01, which attains a maximum value in this ternary system. Adding content of BiCoO3 leads to a disappearance of the response in the curves of dielectric constant-temperature to the ferroelectric–antiferroelectric
transition. The temperature dependence of dielectric properties suggests that the ceramics are relaxor ferroelectrics. The
results show that (1 − x − y)Bi0.5Na0.5TiO3–xBi0.5K0.5TiO3–yBiCoO3 ceramics are good candidate for use as lead-free ceramics. 相似文献
19.
A microwave ceramic with general composition (1-x-y) BaTiO3 + x Cr2Ti3O9 + y Bi2O3 has been prepared by solid state synthesis at 1300-1400 °C. The phase composition, perovskite structural parameters and dielectric properties have been obtained by X-ray diffraction and dielectric measurements as a function of chemical composition and temperature. At low doping levels the formation of BaTiO3-based solid solution has been found. The precipitation of BaCrO3 has been detected at x = y = 2.0 mol%. A model of the incorporation of Cr3+ and Bi3+ ions into BaTiO3-based crystal lattice has been proposed. Diffused phase transition in the temperature range 100-140 °C have been revealed by dielectric measurements for different ceramic composition. As high dielectric constant as 7311 and as low dielectric loss as 0.02 have been found for the composition of 0.98BaTiO3-0.01Cr2Ti3O9-0.01Bi2O3. 相似文献
20.
Yanqiu Huang Yixiong Liu Lanfang Gao Tiantian Liu Guoxi Zhang 《Journal of Materials Science: Materials in Electronics》2010,21(10):1055-1059
The lead free ceramics of two different stoichiometric 0.9(Bi0.5Na0.5)TiO3-0.1Ba(Ti1−x
Zr
x
)O3 (abbreviated as BNBTZ-100x, x = 0, 0.045, 0.050, 0.055, 0.060) and 0.9(Bi0.5Na0.5−y
Li
y
)TiO3-0.1Ba(Ti0.945Zr0.055)O3 (abbreviated as BNLBTZ-100y, y = 0, 0.015, 0.025, 0.035, 0.05, 0.075, 0.10, 0.125) compositions were prepared by the conventional ceramic fabrication technique.
The crystal structure, dielectric and piezoelectric properties of the ceramics were investigated. All the ceramics formed
single-phase solid solutions with tetragonal pervoskite structure, which was affected obviously by the addition of Zr and
Li. The T
m of the BNBZT-100x ceramics trends to increase whereas the T
d trends to decrease as Zr content increases. And the T
d of the BNLBZT-100y increases from 107 to 157 °C when y increases from 0 to 0.015, but decreases sharply as y increases further. The d
33 and k
p of the BNBTZ-100x ceramics tend to increase with the addition of Zr. The maximum values of d
33 and k
p, 156 pC/N and 18.9%, are obtained when x = 0.055. The d
33 of the BNLBTZ-100y ceramics keep almost unchanged when y increases from 0 to 0.035. And maximum value of k
p, 16.3%, of the BNLBTZ-100y ceramics is obtained when y = 0.015. 相似文献