毕业设计说明书中文摘要本课题用溶胶凝胶法来制备制作出高纯度的La1-xSrxMnO3，其中x=0。125、0。175、0。2,以此热致变色前驱体得到的纳米粉末作为填料，并且分别用热塑特性的丙烯酸树脂、松油醇和乙基纤维素作为基料制作成为浆料，同时 采用了旋涂法的工艺技术覆盖在铝材料基底的表面，通过低温条件下进行固化，制备得到La0。875Sr0。125MnO3的热致变色涂层。由本课题实验，表征不同掺杂分量的填料粉末物相，及其表面的形状样貌，相转变特性，并且观察涂层的微观特性样貌。着重使用稳态卡记法测量得出了热致变色涂层在不同温度范围内（173K~373K）其热辐射率跟随温度变化而变化的数值不同。根据研究结果可以看出：这里将两类不同的树脂材料作为基料，从而得到的涂层均可以表现出其具有热致变色的特性，而且发射率增幅可以达到0。45，并且由于这种涂层制备的工艺不复杂，可以用于多种复杂表面涂覆的应用，在航天热控领域中会有很大实用前景。83807

毕业论文关键词  热致变色涂层  溶胶凝胶法  可变发射率

毕业设计说明书外文摘要

Title  The Study of the Experiment on Emissivity of Thermochromism Coating Steady Whole Hemisphere Led by the Sol-gel。

Abstract

窗体顶端

In this experiment, high purity La1-xSrxMnO3 was made by sol-gel, among which x=0。125,0。175,0。2。 Using the precursor of thermochromism as padding, and the sizing agent made by basic materials including acrylic resin, terpilenol, and ethyecellulose of thermoplastic properties, at the same time, using the spin-coating method technique make the surface of aluminum base covered, and through  solidification under the low temperature, the coating of the thermochromism of La0。875Sr0。125MnO3 was made。 In this experiment, we will know the different characteristics of padding powder with different doping component, surface shapes, transition characteristics, and observe the micro-characteristic of coating。 Through the steady-state card notation, we have measured that when the the coating of the thermochromism is under different temperature, the rate of the thermal radiation will change with the temperature。 According to the research results, the coating based on two kinds of different resin materials can show the characteristics of the thermochromism, and it’s amplification of emissivity can reach 0。45。 Due to the simplity of this coating technique, it can be used in varies complicated surface coatings。 Therefore it has a bright practical prospect in the aerospace thermal control field。

Keywords  Thermochromic coating，sol-Gel，Emissivity of Thermochromism

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 3

2。  热致变色块体材料制备方法 6

2。1  溶胶-凝胶法 6

2。2  固相反应法 8

2。3  浮区法 10

3。  热致变色涂层制备方法 13

3。1  物理气相沉积法 13

3。1。1  真空蒸镀法 14

3。1。2  溅射镀膜法 16