双钙钛矿结构材料的介电研究进展
关键字 巨介电材料， ,双钙钛矿材料
毕业设计说明书（毕业论文）外文摘要
Title Dielectric Research Progress of Double perovskite material
Abstract
The development of microelectronics technology, the electronics industry for high-dielectric capacitor elements (capacitors, resonators, filters), memory and other microelectronic devices have faced a great challenge. The material with non-lead-based components, giant dielectric constant and high thermal stability, is potential for the requirement of more intelligent, more miniaturized and more integrated devices has been growing. shows a giant real part of complex relative dielectric value ~104 at 1 kHz frequency in the room temperature range, which is larger than that of most multibasic oxide, therefore, CCTO and double-perovskite have attracted a great deal of attention. Currently the dielectric research of double perovskite materials is focused on that of CCTO. In the paper, we summarized the discovery, the research progress and the application of CCTO, gave a brief introduction of preparation methods, and compared them. In addition, CCTO has been prepared by the solid state reaction, which is the most common method.
Keywords: Giant dielectric material；CaCu3Ti4O12； Dielectric progress.
目录
1. 绪论 .1
2. 巨介电材料的历史背景 2
2.1 CCTO材料的发现2
2.2 问题的提出3
2.3 对CCTO材料巨介电常数来源的探讨.5
3. 巨介电陶瓷材料CCTO7
3.1 CCTO制备方法7
3.1.1.固相反应法7
3.1.2.溶胶凝胶法8
3.1.3.机械合金碾磨法8
3.1.4.脉冲激光沉积法8
3.1.5.移动溶剂浮区法.9
3.1.6.磁控溅射法.9
3.2 CCTO的应用10
3.3 CCTO的研究现状10
4. CCTO的负磁介电效应13
4.1 CCTO陶瓷的微观结构13
4.2 CCTO的负磁介电效应15
5. 实验部分17
5.1 实验原料17
5.2 制备过程17
5.3 烧结温度对CCTO陶瓷介电性能的影响18
结论21
致谢22
参考文献 23
1 绪论
近年来，电子产业发展迅猛，陶瓷电容器的发展方向以轻、薄、短、小和高电容量等为主。研究者提出了两种可能的方法：1.由二文平面的电极结构变为立体的三文电极结构，电极之间的比表面积得到提高。2.利用巨电介质材料作为介质层，以更薄的物理厚度实现相应功能。
另外，电容器件稳定性至关重要。作为潜在应用的巨介电材料，铁电体展现了随温度剧烈变化的的相对介电值，同时伴随着结构相变，不可避免的对器件的稳定性造成破坏。并且，多数铁电材料都含有毒元素铅，威胁到人类的健康，对环境的破坏可想而知。为了适应当前迅猛发展的电子行业，且满足国内对环境保护的政策，只有寻找到一种无铅的、巨介电常数材料。
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