正交设计实验法研究制备WO_3电致变色的工艺条件

本文通过溶胶－凝胶方法、采用正交设计试验研究了制备ＷＯ３电致变色薄膜的条件，并利用电化学循环 伏安装置、分光光度计进行了相关的性能测试，得出了制备ＷＯ３电致变色薄膜的最佳工艺条件。     

平面磁控溅射氧化锌（ZnO）薄膜的几个问题

Ｃ轴取向一致的氧化锌（ＺｎＯ）薄膜是一种良好的压电材料。采用平面磁控溅射是制备ＺｎＯ薄膜较为理想的一种方法。为讨论溅射用靶体的掺杂、溅射功率和基片温度等问题，本实验溅射使用掺有２￣５ｗｔ％碳酸锂（Ｌｉ２ＣＯ３）的烧结陶瓷靶；溅射功率６００Ｗ左右；沉积薄膜基片温度３００℃，并注意其他有关条件的调节，对获得的薄膜用ＸＲＤ等方法评价性能。     

旋转涂布法制备MoO3变色薄膜的研究

近二十年来，过渡金属氧化物半导体薄膜因其具有光致变色／电致变色特性，可作为无机变色材料广泛应用于信息存储、显示以及灵敏器件等方面，而成为材料科学领域的研究热点之一［１～４］．国内外已对多种过渡金属氧化物薄膜进行了深入研究，包括ＷＯ３、ＭｏＯ３、Ｖ２Ｏ...     

BaTiO3薄膜的MOCVD方法制备及进展

本文概述了用金属有机物化学气相沉积（ＭＯＣＶＤ）方法制备ＢａＴｉＯ３薄膜的原理和特点,着重介绍低压ＭＯＣＶＤ、等离子体增强ＭＯＣＶＤ和光辅助ＭＯＣＶＤ三种技术在ＢａＴｉＯ３薄膜制备中的应用,并指出了最新进展进行、存在的困难和今后的发展趋势。     

在ITO玻璃衬底上制备锆钛酸铅铁电薄膜

利用射频反应性溅射沉积技术在掺的Ｓｎ的Ｉｎ２Ｏ３导电透明膜衬底上制备了钙钛矿型Ｐｂ（Ｚｒ,Ｔｉ）Ｏ３（ＰＺＴ）铁电薄膜。研究了沉积参量与热处理工艺对铁电薄膜结构和性能的影响。运用Ｘ射线衍射、Ｘ射线光电子能谱和扫描电镜等技术,分析了薄膜的晶体结构、表面形貌和表面元素化学状态。测量了不同处理条件下薄膜的铁电性能。结果表明：在掺Ｓｎ的Ｉｎ２Ｏ３导电透明膜衬底上可以得到表面无裂纹,化学计量比符合要求的ＰＺ     

活性超细CaCO3在聚乙烯薄膜中的应用

本文介绍了聚乙烯薄膜用超细碳酸钙的物性，表面活化方法以及活性超细ＣａＣＯ３对聚乙烯薄膜的加工性能和物理力学性能的影响，并作了相应的解释说明。     

LaNiO_3薄膜的制备及其氧敏特性的研究

本文以Ｌａ（ＮＯ_３）_３·６Ｈ_２Ｏ和Ｎｉ（ＮＯ_３）_２·６Ｈ_２Ｏ为配位前驱体,采用柠檬酸为螯合剂,利用溶胶－凝胶法合成了钙钛矿型稀土复合氧化物ＬａＮｉＯ_３薄膜,研究了薄膜的氧敏特性及烧结温度对薄膜氧敏特性的影响。     

掺铝钛酸锶薄膜及其与CrOx复合膜的制备及氧敏性能的研究

以ＴｉＣｌ４,ＳｒＣｌ２．６Ｈ２Ｏ为主要原料,采用溶胶－凝胶法制备出掺Ａｌ＾３＋的钛酸锶薄膜,分析了薄膜的表面形貌和晶相组成,并比较了铝含量不同的ＳｒＴｉ１－ｘＡｌｘＯ３－δ薄膜的氧敏性能,实验结果表明：掺摩尔分类为０．０１的铝的钛酸锶薄膜表现出较高的氧敏性,但是,铝的掺入并没有消除钛酸锶薄膜的半导体特在中性气氛附近从ｎ型向ｐ型转变。在此基础上,又合了了ＳｒＴｉ０．９９Ａｌ０．０１Ｏ３－δ－ＣｒＯ     

电子陶瓷粉BaTiO3的液相合成技术：Ⅱ前驱体草酸氧钛钡热分解机理研究

本文对液相合成ＢａＴｉＯ３的前驱体草酸氧钛钡采用ＩＲ、ＸＲＤ分析手段跟踪不同分解温度下其组分及晶型的变化规律，结合ＭＲ－ＧＣ、ＤＴＡ和ＴＧ等分析结果，阐述了草酸氧钛钡的热分解机理。分析结果表明前驱体在２００℃之前除四份结晶水成无定形，２２０－４７０℃时是无水草酸氧钡分解为ＢａＣＯ３和ＴｉＯ２并放出ＣＯ、ＣＯ２气体，７５０℃时是固相ＢａＣＯ３和ＴｉＯ２之间的反应生成立方晶型的ＢａＴｉＯ３，在１０００     

纳米Al2O3薄膜相变过程中远红外吸收谱的演变

本文通过Ｘ光衍射和远红外透射谱的测量，系统地研究了纳米结构Ａｌ２Ｏ３薄膜在相变过程中远红外吸收谱特征及演变，观察到随着热处理温度的升高，红外吸收带变窄，δ－Ａｌ２Ｏ３红外谱上出现一个新的吸收带，其峰位为－１８０ｃｍ＾－１。转变成θ－Ａｌ２Ｏ３时，Ｐ１带分裂为两个吸收带，峰位分别为１２５ｃｍ＾－１和２１０ｃｍ＾－１。     

溶胶-凝胶法制备WO3电色薄膜

采用溶胶-凝胶法以钨粉过氧化聚钨酸的有机溶液为先驱物制备出了WO3薄膜,研究了添加无水乙醇、冰乙酸对其成膜性能的影响,并进行了厚度、可见光谱、电化学循环伏安、X-射线测试.结果表明该法能制得质量好的WO3非晶态薄膜.     

纳米WO_3/玻璃薄膜光催化性能研究

以溶胶-凝胶法制备纳米WO3/玻璃薄膜,并用UV-Vis法,IR法和XRD方法进行了表征。以10 mg/L罗丹明B为降解对象,考察其光催化性能。结果表明：经500℃灼烧2 h以上制备的厚度为278 nm的两层涂膜,在pH=3.0、鼓入空气、光强为1.81×1016光子/s等条件下薄膜具有最佳光催化活性,对罗丹明B的光催...     

Sol–Gel Route to Porous Lanthanum Cobaltite (LaCoO3) Thin Films

Sol–gel-derived LaCoO₃ thin films were deposited on yttria-stabilized zirconia (YSZ) substrates from a lanthanum isopropoxide–cobalt acetate (with 2-methoxyethanol) precursor solution. A chelating agent (2-ethylacetoacetate) and polyethylene glycol (PEG) were used to modify the above-mentioned precursor solution. The La-Co precursor solution was sufficiently viscous, and transparent LaCoO₃ gel films were prepared successfully using a spin-coating technique. Crystallization behavior and microstructure evolution were investigated using X-ray diffractometry (XRD) and scanning electron microscopy (SEM). A single-phase perovskite thin film with the grain size of ∼50 nm was obtained by heat-treating the spin-coated gel film at a temperature of 600°C. SEM observations revealed that the microstructure of LaCoO₃ thin films that were prepared from the precursor solution with PEG was porous, and the LaCoO₃ thin film maintained its porous microstructure to a temperature of 800°C.     

工艺参数对磁控溅射WO_3薄膜电致变色性能的影响

本文采用磁控溅射法制备了用于电致变色器件的WO_3薄膜,用X射线衍射仪(XRD)、场发射扫描电镜(FE-SEM)、紫外-可见分光光度计(UV-Vis)对其物相组成、微观形貌以及电致变色性能进行了表征。结果表明:在溅射压强为2 Pa、氩氧比为60:20时所制备的WO_3薄膜厚度适中,且有利于离子的嵌入/脱出,而以此薄膜制备的电致变色器件光调制范围最大,褪色时间最短,着色效率达82.9 cm~2/C。     

铜离子掺杂对二氧化钛薄膜光催化性能的影响

采用溶胶-凝胶法在玻璃表面制备了Cu2 掺杂TiO2复合纳米薄膜.掺杂Cu2 的数量和方式及前驱体对TiO2光催化降解甲基橙有不同程度的影响.当合成TiO2前驱体的原料为Ti(OC4H9)4时,预涂一层质量分数(下同)为1.0%的Cu(CH3COO)2水溶液,可使TiO2光催化氧化活性提高53%,最外层掺入Cu2 会减弱TiO2光催化氧化活性.当TiO2的前驱体为工业偏钛酸时,预涂一层1.0%Cu(CH3COO)2水溶液,仅使TiO2光催化氧化活性提高14%.用X射线衍射对纳米薄膜进行表征.Cu2 掺杂会诱导生成金红石相.     

Effects of Excess Bismuth Content in Precursor Solutions on Ferroelectric Properties of BiFeO3 Thin Films Prepared by a Chemical Solution Deposition

Cr-substituted BiFeO₃ (BFCr) thin films prepared from precursor solutions with stoichiometric composition and various excess Bi contents ranged from 5 to 20 mol% were fabricated on Pt/TiO₂/SiO₂/Si(100) substrates by a chemical solution deposition method, and the effects of excess Bi content in precursor solutions on the ferroelectric properties of the as-deposited BFCr thin films were studied. It was found that the BFCr thin film prepared from precursor solution with excess Bi content of 5 mol% exhibited the best dielectric constant-frequency and polarization-electric field characteristics. In detail, its dielectric constant is 158 at frequency of 100 kHz and remnant polarization (P_r) value is 49 μ C/cm² at electric field of 600 kV/cm.     

纳米WO3薄膜的制备方法及性质研究

介绍和分析了制备纳米WO3薄膜的主要方法及各自优缺点;对纳米WO3的性质研究现状作了简要概述,并提出了纳米WO3薄膜的发展前景.     

纳米WO_3薄膜的制备方法及性质研究

介绍和分析了制备纳米WO3薄膜的主要方法及各自优缺点;对纳米WO3的性质研 究现状作了简要概述,并提出了纳米WO3薄膜的发展前景。     

Preparation of Ba2YCu3O7-δ Thin Films with Preferred Orientation through an Organometallic Route

Superconducting Ba₂YCu₃O_7-δ thin films were prepared through an organometallic route. Single-phase Ba₂YCu₃O_7-δ thin films with preferred orientation were successfully prepared on SrTiO₃ (100) single-crystal substrates at 800°C by a dip coating method using partially hydrolyzed Ba-Y-Cu organometallic solutions. Preferentially oriented Ba₂YCu₃-O_7-δ thin films were also prepared on MgO (100) substrates. By controlling the partial hydrolysis conditions, a coating solution for precursor thin films was kept accurately at the stoichiometric composition. The use of ozone gas during the pyrolysis of the precursor thin films was found to suppress the formation of BaCO₃. Ba₂YCu₃O_7-δ thin films with c -axis orientation perpendicular to a SrTiO₃ (100) substrate, which were heat-treated at 900°C for 15 min, exhibited a superconductivity transition with an onset of 90 K and an end of 75 K.     

Fabrication and characterization of WO3/Ag/WO3 multilayer transparent anode with solution-processed WO3 for polymer light-emitting diodes

ABSTRACT: The dielectric/metal/dielectric (DMD) multilayer is suitable for a transparent electrode because of its high optical and high electrical properties; however, it is fabricated by an expensive and inefficient multistep vacuum process. We present a WO3/Ag/WO3 (WAW) multilayer transparent anode with solution-processed WO3 for polymer light-emitting diodes (PLEDs). This WAW multilayer not only has high transmittance and low resistance but also can be easily and rapidly fabricated. We devised a novel method to deposit a thin WO3 layer by a solution process in an air environment. A tungstic acid solution was prepared from an aqueous solution of Na2WO4 and then converted to WO3 nanoparticles (NPs) by a thermal treatment. Thin WO3 NP layers form WAW multilayer with a thermal evaporated Ag layer, and they improve the transmittance of the WAW multilayer because of its high transmittance and refractive index. Moreover, the surface of the WO3 layer is homogeneous and flat with low roughness because of the WO3 NP generation from the tungstic acid solution without aggregation. We performed optical simulation and experiments, and the optimized WAW multilayer had a high transmittance of 85% with a sheet resistance of 4 /sq. Finally, PLEDs based on the WAW multilayer anode achieved a maximum luminance of 35550 cd/m2 at 8 V, and this result implies that the solution-processed WAW multilayer is appropriate for use as a transparent anode in PLEDs.