ZnO-Sb2O3-P2O5系统玻璃的制备与性能

用熔体冷却方法制备了xSb2O3-(70-x)P2O5-30ZnO(x=0~40mol)和xSb2O3-(65-x)ZnO-35P2O5(x=0~40mol)系统无铅易熔玻璃,研究了ZnO-Sb2O3-P2O系统玻璃的形成区。采用热膨胀仪和红外光谱仪等对ZnO-Sb2O3-P2O5系统玻璃的结构及性能进行了研究和分析。结果表明,在ZnOSb2O3-P2O5系统玻璃中,Sb2O3参与网络结构。随着Sb2O3含量的增加,玻璃的软化点降低,密度和化学稳定性增加。在Sb2O3摩尔分数为35%左右时,系统玻璃的结构和性能比较优异。     

基于光学电负性二元玻璃折射率和密度的研究

采用熔融法制备R2O3-B2O3（R=Bi,Sb）二元玻璃,测量二元玻璃的折射率、密度和禁带宽度,并利用二元玻璃禁带宽度Eg计算玻璃的光学电负性,再用光学电负性计算R2O3-B2O3（R=Bi,Sb）二元玻璃的2个重要参数：折射率和密度.实验结果表明,计算数值和实验数值非常接近,为R2O3-B2O3（R=Bi,Sb）二元玻璃的非线性光学材料的设计提供了一个很好的参数.     

Flame retardancy and its mechanism of polymers flame retarded by DBDPE/Sb2O3

The flammability characterization and thermal composition of polymers flame retarded by decabromodiphenylethane （DBDPE） and antimony trioxide （Sb2O3） were studied by cone calorimeter and thermogravimetry （TG）. The results show that ABS/DBDPE/Sb2O3 has the similar flammability parameters and thermal composition curves to ABS/DBDPO/Sb2O3. It suggests that DBDPE/Sb2O3 has the similar flame retardant behavior to DBDPO/Sb2O3. The heat release rate （HRR） and the effect heat combustion （EHC） curves of polymers flame retarded by DBDPE/Sb2O3 all decrease, but the mass loss rate （MLR） curve slightly increase. It shows that the decrease of HRR is not due to the increase of char formation ratio but the generation of incombustible gases. The major flame retardant mechanism of DBDPE/Sb2O3 is gas phase flame retardant mechanism. Increasing content of Sb2O3 in DBDPE/Sb2O3 can improve the flame retardant property and thermal stability of acrylonitrile butadiene styrene. Sb2O3 has a good synergistic effect with DBDPE.     

INFLUENCE OF Sb_2O_3 AND PbO CONTENT ON GLASS PROPERTIES OF SiO_2-BASED FOR HOLLOW WAVEGUIDES

The reflective spectra of two glass systems of Na2O-ZnO-GeO2-SiO2-PbO(Sb2O3) were measured to study the effects of PbO and Sb2O3 on properties in SiO2-based glasses. The infrared reflective coefficients and anomalous dispersion regions change with the content of PbO and Sb2O3 respectively, furthermore the refractive indices (nr) of glasses are 0. 81 and 0. 84 at the wavelength of CO2 laser (940cm-1). The glasses of two systems can be used as the cladding materials of hollow waveguides for transmitting CO2 laser.     

CaO对ZnO-Sb2O3-P2O5-CaO系统玻璃结构与性能的影响

采用熔体冷却的方法制备了(30-x)ZnO-35Sb2O3-35P2O5-xCaO(x=0~12.5mol)系统玻璃,并借助红外光谱、差热曲线等对玻璃结构和性能进行了分析。结果表明,随着CaO的增加,磷酸盐玻璃的结构无明显的变化;随着CaO取代ZnO含量的不断增加,玻璃的转变温度和软化温度都有所提高,同时提高了玻璃的耐水性。由于CaO和ZnO的分子质量和摩尔体积相差不大,所以取代后磷酸盐玻璃的密度和摩尔体积有所下降但变化不大。玻璃的热膨胀系数和抗析晶能力随着CaO含量的增加都先增加后减小。     

One-pot synthesis of Sb-Fe-carbon-fiber composites with in situ catalytic growth of carbon fibers

A Sb-Fe-carbon-fiber (CF) composite was prepared by a chemical vapor deposition (CVD) method with in situ growth of CFs us-ing Sb2O3/Fe2O3 as the precursor and acetylene (C2H2) as the carbon source. The Sb-Fe-CF composite was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), and its electrochemical per-formance was investigated by galvanostatic charge-discharge cycling and electrochemical impedance spectroscopy. The Sb-Fe-CF composite shows a better cycling stability than the Sb-amorphous-carbon composite prepared by the same CVD method but using Sb2O3 as the precur-sor. Improvements in cycling stability of the Sb-Fe-CF composite can be attributed to the formation of three-dimensional network structure by CFs, which can connect Sb particles firmly. In addition, the CF layer can buffer the volume change effectively.     

Growth of Nano-Sb2O3 on Mica Substrates and Flame Retardant Properties

In this paper, the Sb2O3 nanoparticles prepared with SbCl3 by the alky hydrolysis, processed with the surfactants, were assembled on mica substrates. The morphology and the assembled behavior of the nano-Sb2O3 on the mica were analyzed by means of TEM. The flame retardant properties of nano-Sb2O3 and Sb2O3/mica complex were studied by combustion test and thermal analysis. The results show that the Sb2O3 nanoparticles are assembled uniformly on the mica substrates. The nano-Sb2O3 was characterized with small size, narrow size distribution, uniform crystal and monodispersed particles. Compared with nano-Sb2O3, the Sb2O3/mica complexes have been achieved the same coordinated effects with Chlorinated Paraffin（CP） and excellent flame retardant properties.     

稀土元素铈离子掺杂对镍铬锌铁氧体电磁性能的影响

自蔓延燃烧法制备Ni0.4Cr0.4Zn0.2CexFe2-xO4(x=0,0.1)铁氧体,用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、振动样品磁强计(VSM)和矢量网络分析仪表征了铁氧体的结构形貌、磁性能及介电性能。结果表明:两种粉体粒径均在180nm左右,晶格常数为0.8364nm。由于Ce3+取代了部分Fe3+,导致Ni0.4Cr0.4Zn0.2Ce0.1Fe1.9O4的饱和磁化强度Ms从75.53emu/g增大到81.53emu/g,剩余磁化强度Mr由27.85emu/g增至32.58emu/g,但矫顽力Hc从481.56Oe降至453.42Oe,在8.0~20.0GHz频率范围内,Ni0.4Cr0.4Zn0.2Ce0.1Fe1.9O4的反射损耗明显高于Ni0.4Cr0.4Zn0.2Fe2O4,Ni0.4Cr0.4Zn0.2Fe2O4的反射损耗在-3.98d B~-5.11d B之间,Ni0.4Cr0.4Zn0.2Ce0.1Fe1.9O4的反射损耗在-5.18d B~-6.94d B之间。     

Influences of polishing on return loss of optical fiber connectors

With Al2O3 and SiO2 as polishing medium, under different polishing conditions, e.g. with different polishing pressure, polishing time and polishing fluid, the influences of polishing treatment on the return loss of optical fiber connectors were investigated. The return loss of optical fiber connectors is 32-38 dB before polishing. The resuits show that dry polishing(i, e. no polishing fluid) with Al2O3 has less influence on return loss of optical fiber connectors, while dry polishing with SiO2 reduces return loss to about 20dB because of the end-face of optical fiber contaminated. The wet polishing(i, e. using distilled water as polishing fluid) with Al2O3 or SiO2 can increase return loss to 45-50dB, but wet polishing with Al2O3 may produce optical fiber undercut depth of 80-140nm. Wet polishing with SiO2 should be preferentially selected for optical fiber connectors and polishing time should be controlled within 20-30s.     

水热法制备Sb_2Se_3纳米晶

以酒石酸锑钾(K(SbO)C4H4O6.1/2H2O)和硒粉作为锑源和硒源,自制的2-十一烷基-1-二硫脲乙基咪唑啉季铵盐(SUDEI)为表面活性剂,150℃水热反应24 h,得到不同形貌的Sb2Se3纳米晶。通过透射电镜(TEM)、X射线衍射(XRD)、X射线光电子能谱仪(XPS)对Sb2Se3纳米晶进行了表征。讨论了反应条件对Sb2Se3纳米晶形貌的影响。     

低压制备纳米Sb_2O_3粉的研究

用低压蒸发普通 Sb2 O3的方法制备出了纳米 Sb2 O3,分析了生成 Sb2 O3的热力学条件 ,对抑制 Sb2 O3的分解做了详细的理论分析 ,确定了制备纳米 Sb2 O3的温度条件和压力条件 ,证明在一定的氧分压情况下 Sb2 O3是不会分解的 ,测定了 Sb2 O3的粒度和粒度分布 ,探讨了生产可行性     

输送带覆盖胶的阻燃配合研究

设计以天然橡胶（NR）/氯丁橡胶（CR）为阻燃输送带的主要原料配方.采用Sb2O3、ZB（硼酸锌）以及Mg（OH）2作为阻燃体系,考察Sb2O3的用量,ZB与Sb2O3的并用等对共混橡胶的阻燃性能及力学性能.实验结果表明：Sb2O3、ZB以及Mg（OH）2在共混胶料中能产生协同阻燃效应.随Sb2O3用量的增加氧指数和燃烧等级均有提高,而拉伸强度和断裂伸长率下降,随三氧化二锑用量进一步增加,阻燃效果不再增加.于是采用ZB和Mg（OH）2做进一步的协同阻燃增强,使阻燃性能有所提高,得到了综合性能达到指标MT668-1997要求的输送带覆盖胶.     

高发泡硬质PVC阻燃材料的制备及性能研究

采用一步模压法制备了硬质聚氯乙烯（PVC）发泡材料,研究了发泡剂偶氮二甲酰胺（AC）、活化剂氧化锌（ZnO）、交联剂过氧化二异丙苯（DCP）的用量以及成核剂碳酸钙（CaCO3）的种类对PVC泡沫塑料性能的影响;研究了阻燃剂三氧化二锑（Sb2O3）对PVC泡沫塑料阻燃性能的影响.结果表明：当选择PVC树脂100份、钙锌复合稳定剂5份、硬脂酸（Hst）0.2份、PE蜡0.3份、AC5份、ZnO1份、DOP6份、DCP 3份、轻质CaCO310份、模压压力为10.0MPa、模压温度为185℃、模压时间为15min时,可获得泡孔均匀细密、密度较小的高发泡硬质PVC板材,SEM显示泡沫材料泡孔直径为50!m左右.Sb2O3能显著提升PVC泡沫材料的阻燃性能,当Sb2O3用量为8份时,材料氧指数达43.     

Sb掺杂对0.95MgTiO3-0.05CaTiO3陶瓷介电性能的影响

采用固相反应法制备了( Mg0.95-X Ca0.05 SbX) TiO3微波介质陶瓷.研究了Sb掺杂对0.95MgTiO3-0.05 CaTiO3 (95MCT)陶瓷性能的影响.结果表明:Sb掺杂95MCT陶瓷的主晶相为MgTiO3和CaTiO3两相,有中间相MgTi2O5的产生;Sb掺杂能有效的降低95 MCT陶瓷...     

Deposition of antimony telluride thin film by ECALE

The process of Sb2Te3 thin film growth on the Pt substrate by electrochemical atomic layer epitaxy (ECALE) was studied. Cyclic voltammetric scanning was performed to analyze the electrochemical behavior of Te and Sb on the Pt substrate. Sb2Te3 film was formed using an automated flow deposition system by alternately depositing Te and Sb atomic layers for 400 circles. The deposited Sb2Te3 films were characterized by XRD, EDX, FTIR and FESEM observation. Sb2Te3 compound structure was confirmed by XRD pattern and agreed well with the results of EDX quantitative analysis and coulometric analysis. FESEM micrographs showed that the deposit was composed of fine nano particles with size of about 20 nm. FESEM image of the cross section showed that the deposited films were very smooth and dense with thickness of about 190 nm. The optical band gap of the deposited Sb2Te3 film was determined as 0.42 eV by FTIR spectroscopy, and it was blue shifted in comparison with that of the bulk Sb2Te3 single crystal due to its nanocrystalline microstructure.     

Comprehensive optimization of electrical and optical properties for ATO films prepared by pulsed laser deposition

Antimony doped tin oxide(ATO) thin films have been prepared by pulsed laser deposition(PLD) method.The intrinsic effect of Sb dopant,including the Sb content,transition degree between Sb~(3+) and Sb~(5+) and crystallinity on the electrical and optical properties of the ATO thin films is mainly investigated.It is suggested that the transition degree of Sb~(3+) towards Sb~(5+)(Sb~(5+)/Sb~(3+) ratio) is determined by Sb content.When the Sb content is increased to 12 at%,the Sb~(5+)/Sb~(3+) ratio reaches the highest value of 2.05,corresponding to the resistivity of 2.70×10~(-3) Ω·cm.Meanwhile,the Burstein-Moss effect caused by the increase of carrier concentration is observed and the band gap of the ATO thin films is broadened to 4.0 eV when the Sb content is increased to 12 at%,corresponding to the highest average optical transmittance of 92%.Comprehensively considering the combination of electrical and optical properties,the ATO thin films deposited with Sb content of 12 at%exhibit the best properties with the highest "figure of merit" of 3.85×10~(-3) Ω~(-1).Finally,an antimony selenide(Sb_2Se_3) heterojunction solar cell prototype with the ATO thin film as the anode has been prepared,and a power conversion efficiency of 0.83%has been achieved.     

煅烧温度对ATO/TiO_2粉体表面晶化及电导率的影响

用湿化学法在TiO2颗粒表面包覆ATO制得ATO/TiO2复合导电粉;运用TG-DSC、XRD、XPS、SEM、和电导率测试等手段对ATO/TiO2导电粉进行了表征.结果表明：煅烧温度对SnO2的晶化程度、Sb的价态、ATO/TiO2导电粉的导电性产生影响.电导率-温度（lnσ-T）关系呈抛物线（100～900℃）：上坡段（150～400℃）,温度增加,无定形SnO2逐渐晶化,电导率增加,导电性上升,溶入SnO2的Sb3＋→Sb5＋转变,载流子浓度加大,包膜层多孔结构逐渐致密化;底部平台（400～600℃）,SnO2晶化结束,Sb3＋→Sb5＋转变趋于完成,电子散射趋于最低,电导率最大,导电性达到最佳;下坡段（600～900℃）,Sb3＋→Sb5＋转变发生逆转,TiO2基体颗粒长大,锐态型向金红石型转变,破坏包膜结构,电导率上升,导电性恶化.     

反钙钛矿晶体Sc3AlN电子结构和光学性质的第一性原理研究

采用基于密度泛函理论的第一性原理的分子动力学方法,对立方反钙钛矿Sc3AlN的电子结构和光学性质进行了计算．系统分析了Sc3AlN电子结构和成键情况,并利用计算的能带结构和态密度分析了Sc3AlN的介电函数实部和虚部以及由它们派生出来的光学常数,即折射率、反射谱、吸收谱、光电导率和能量损失函数等．计算结果表明Sc3AlN属于导体材料,其价带主要由Al的2s2p,Sc的3d态电子构成,导带主要由Sc的3d态电子构成,静态介电常数ε1（O）=22．1,折射率n（0）=4．7．     

第一性原理研究Mn重掺杂对β-Ga2O3的电子结构和光学性能的影响

采用基于密度泛函理论的第一性原理研究了Mn重掺杂对β-Ga2O3物理性能的影响。建立了β-Ga2O3模型,用Mn原子部分替代Ga原子构建Ga2-xMnxO3的超胞模型,实现对β-Ga2O3的掺杂,分别对x等于0.0625、0.125和0.25的模型进行了几何结构优化,获得稳定的晶格结构和晶胞参数,并对它们的能带结构、态密度和光学性能等进行分析。计算结果表明：Mn掺杂后,禁带宽度减小,费米能级上移进入导带,增大了载流子浓度,提高了体系的电导率;介电函数的虚部有明显的变化;β-Ga2O3在400-700nm的范围内,吸收系数和反射率均有不同程度的降低,与未掺杂的β-Ga2O3相比,能量损失谱的峰值发生了红移。     

无铅压电陶瓷钛酸铋钠(NBT)的掺杂改性研究

在无铅压电陶瓷（Na0.5Bi0.5)TiO3(NBT)中加入BaTiO3(BT)及微量Sb2O3，对其进行掺杂改性研究。通过研究不同加入量对NBT性能的影响，得到了较佳性能的材料配方为（Na0.5Bi0.5)0.92Ba0.08TiO3 ySb2O3(量分数y=0.0005%)。