In recent years , the interest in the use of ferroelectric materials in the manufacture of microwave components has grown tremendously , such as varactors , voltage tunable filters , phase shifters and voltage controlled oscillators 近年来,对于铁电薄膜材料的研究取得了很大进步,利用铁电材料的压控特性,已经研制成功了多种压控微波器件,如可变电容器、滤波器、移相器和振荡器等。
This thesis reviewed the development of the microwave tunable ferroelectric thin film materials , summarized the application of sol - gel on the materials , and introduced the principle and application of the microwave tunability in brief 本文全面综述了微波可调铁电薄膜材料的研究发展，总结了溶胶凝胶技术在制备此类材料中的应用，简要介绍了铁电材料微波可调的基本原理及其应用。
Lead lanthanum zirconate titanate ( plzt ) and strontium barium titanate ( bst ) thin films are excellent materials for the potential applications in optical waveguide and optical commutation , due to their excellent electrical , optical and electro - optical ( e - o ) properties Plzt 、 bst铁电薄膜具有良好的光学、电学和电光性能,因而在光波导、电光开关等方面具有广阔的应用前景。
Meanwhile , it was found that there was a relationship between the depletion width and the number of cycles [ n ( 50 % ) ] which the polarization degraded 50 % in the experiment . with this relationship , we can predict the ferroelectric films " service life 并且我们发现修正的损耗层宽度与铁电疲劳极化衰变50的循环次数值[ n ( 50 ) ]有一定关系，可以用这个关系预测铁电薄膜的使用寿命。
In the introduction of this master thesis , the potential applications of the ferroelectric thin films , preparation methods and the current research on the residual stress in the ferroelectric thin films are reviewed 因此,铁电薄膜中的应力研究是关于铁电薄膜的制备和性能研究的重要内容。本文首先在引言部分对铁电薄膜的应用背景、制备方法以及目前铁电薄膜内残余应力的研究现状进行了评述。
