溶胶-凝胶法制备热致变色涂层La0.825Sr0.125MnO3
关键词 可变发射率，溶胶-凝胶法，La0.8Sr0.2MnO3 ，热致变色涂层
毕业论文设计说明书外文摘要
Title Prepare thermochromism coating by sol-gel technology
Abstract
With the development of the micro spacecraft , there are strict control requirements in the weight what requires that the thermal control system reduces the weight and volume as well as possible.thermochromism materials have the adjustability that the emissivity could be changed with temperature. So in the thermal control technique fields of spacecraft ,it is widely concerned .Thermal control method which based on thermochromism materials has a lot of advantages such as efficient and reliable,withing no moving parts,easy design and self-motion temperature control . So it is necessary to develop thermochromism coating with the light weight and low volume to meet the requirements of the development of micro spacecraft . The article introduces that using the sol-gel method to make La0.825Sr0.125MnO3 thermochromism coating and collecting the characterization such as morphology，texture and spectral quality of the material,researching the the change laws of radiation characteristics. The further test made La0.8Sr0.2MnO3 thermochromism coating added neodymium to the coat and do research and analysis to the material.
Keywords sol-gel method，La0.8Sr0.2MnO3 ，thermochromism coating
目 次
1 绪论 1
1.1 研究背景及意义 1
1.2 国内外研究现状 2
1.2.1 可变发射率热控技术的发展现状 2
1.2.2 热致变色涂层的发展现状 2
2 热致变色块体材料的制备方法 6
2.1 溶胶-凝胶法 6
2.2 固相反应法 7
2.3 浮区法 7
3. 热致变色涂层制备方法 11
3.1 物理气相沉积法 11
3.1.1 真空蒸镀法 11
3.1.2 溅射度膜法 12
3.2 等离子喷涂法 12
3.3 溶胶凝胶法 13
4 样品的表征和辐射特性研究 15
4.1 块体材料的形貌分析和能谱图 15
4.1.1 形貌分析 15
4.1.2 能谱图 16
4.2 涂层的物相分析和辐射特性研究 17
4.2.1 涂层的物相分析 17
4.2.2 涂层的辐射特性研究 18
5 进一步掺杂钕元素的块体材料研究 21
结 论 22
致 谢 23
1 绪论
1.1 研究背景及意义
从1957年前苏联发射第一颗人造卫星至今的50多年，航天技术得到了迅猛的发展，世界各国陆续发射了很多不同功能的卫星，取得无数令世人瞩目的成就，为人类生活带来巨大的便利。从1964年第一颗人造地球卫星“东方红”1号成功升空，到2005年“神州五号”载人航天飞船的成功发射，再到2012年“神州九号”飞船与“天宫一号”飞行器实现对接，我国的航天技术取得了长足的进步，提高了我国在世界上的地位。
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