氧化物冶金技术及应用

介绍了氧化物冶金技术中非金属夹杂物的性质与作用及境内铁素体的形核机理,并对氧化物冶金技术的若干关键技术问题进行了探讨,分析了氧化物冶金技术的应用现状。     

下地幔钙钛矿顽火辉石相稳定性研究及其进展

介绍了钙钛矿顽火辉石的晶体结构,概述了钙钛矿顽火辉石在下地幔条件下的结构及稳定性研究状况,并展望了钙钛矿顽火辉石的研究发展方向.     

水热方法合成钙钛矿型LaCrO3复合氧化物及光催化性质

利用水热方法合成出钙钛矿型LaCrO3复合氧化物,产物产率高,结晶度高,形貌规则.以其为催化剂对水溶性染料酸性红3B进行光催化降解,发现这类化合物具有光催化性能.     

Organolead halide perovskites: a family of promising semiconductor materials for solar cells

Great attention has recently been drawn to developing cost-effective, high efficiency solar cells to meet the ever increasing demand for clean energy. We have most recently witnessed a breakthrough and a rapid development in solid state, hybrid solar cells using or- ganolead halide perovskites as light harvesters. These semiconductors can not only serve as sensitizer in solid state sensitized solar cells with efficiency up to unprece- dented 15 %, but also function as both light absorber and hole conductor （or electron conductor） at the same time to display power conversion efficiency above 10 %. In this review, we will introduce their operation mechanism, structure, and especially the development of the organolead halide perovskite based solar cells. Based on the achieve- ments that have been made to date, solid state photovoltaic device with superior performance than the present one is highly expected.     

ZnO 玻璃系压敏电阻配方研究

研究了 Zn O玻璃系压敏电阻的材料组成对其微观结构和电性能的影响 .发现玻璃料的添加量 w玻璃料 一般在 8.0 %～ 1 0 .0 %时效果最佳 .Sb2 O3的引入可生成 Zn7Sb2 O1 2 尖晶石相 ,抑制晶粒的生长 ,并使压敏场强E和非线性系数 α值增加 .Co和 Mn的添加使界面态密度增加 ,引起势垒升高 ,使非线性特性显著提高     

改进溶胶-凝胶法制备超细纳米Ce0.8Nd0.2O2-δ复合氧化物的研究

采用常规和改进的柠檬酸溶胶-凝胶法(Sol-Gel)制备了Ce0.8Nd0.2O2-δ复合氧化物,通过XRD、TG-DSC和Raman对复合氧化物的结构进行表征.结果表明,改进的柠檬酸Sol-Gel法可制得晶粒更小的纳米Ce0.8Nd0.2O2-δ复合氧化物,N-800样品的平均晶粒仅为15.8nm,说明改进的方法有利于提高样品的抗烧结能力.两种Ce0.8Nd0.2O2-δ复合氧化物中均出现了归属于由氧缺位的不对称振动产生的位于550cm-1附近的Raman谱峰,表明固溶体的生成有利于促进氧缺位的形成.     

Advanced materials for aqueous supercapacitors in the asymmetric design

Supercapacitors have been recognized as one of the promising energy storage devices in the future energy technology. In this perspective, rapid progress is made in the development of fundamental and applied aspects of supercapacitors. Various techniques have been developed specifically to estimate the specific capacitance. Numerous efforts have been made in the literature to increase the specific capacitance of electrode materials. Recently, researchers pay more attention on designing supercapacitors of asymmetric type with extending cell voltage and dissimilar materials with complementary working potentials. Researchers try to increase the specific energy of asymmetric supercapacitors (ASCs). Conversely, it is still a challenge to find a suitable operation conditions for ASCs in various designs, especially for the one with battery type electrode. In this review, we describe our recent research works and other reports on the preparation of various nanostructured electrode materials and the performances of both symmetric and asymmetric supercapacitors. Finally, we demonstrate effects of charge balance on the capacitive performances of ASCs which consist of one electrode material of the battery type and one capacitive material. We also demonstrate how to evaluate the charge capacities of both positive and negative electrode materials for this ASC application.     

层状钙钛矿锰氧化物La_（1.3-x）Gd_xSr_（1.7）Mn_2O_7（x=0,0.05）的磁性和电性研究

采用传统的固相烧结法制备了多晶样品La1.3-xGdxSr1.7Mn2O7（x=0,0.05）,对其磁性和电性进行了研究.研究表明：当x=0.05的Gd掺入后,由于铁磁性的减弱导致样品的磁化强度、二维磁转变温度T2D和三维磁转变温度T3D都随之降低,且在低温下有自旋璃态出现.此外,样品的金属-绝缘体转变温度TM1降低,电阻率增大.以上现象的产生可归结为：由于Gd掺杂导致了晶格失配,减弱了双交换作用,致使上述现象出现.     

纳米钙钛矿型氧化物LaFeO3和LaMnO3形成过程

采用柠檬酸为配体的溶胶－－凝胶方法制备，米钙钛矿型复合氧化物ＬａＦｅＯ３，ＬａＭｎＯ３其形成过程采用坶粉末衍射，红外、穆斯堡尔谱和差热－热重分析方法进行了研究，发现３００℃以下游离的柠檬酸分解，分解过程中表面上有单齿碳酸盐形成，纳米ＬａＦｅＯ３和ＬａＭｎＯ３形成温度区间分别为４５０－５５０℃和４５０－５８０℃，分解过程中未检测到单组分氧化物Ｌａ２Ｏ３，Ｆｅ２ｏ３，ＭｎＯ３。