中文摘要：

采用气氛液相烧结技术，以Li2O一B2O3-SiO2系玻璃为基料，纳米α—Al2O3陶瓷粉为增强体，在铜表面制备出了绝缘抗氧化涂层。通过调节增强体的含量改善涂层的性能。对涂层的微观结构及组成、电学特性、抗氧化特性进行了研究。结果表明：在铜表面制备出的涂层表面光滑致密、厚度均匀，与基底结合牢固；在空气中400℃条件下氧化61h，复合涂层包覆的铜基底无明显氧化；在玻璃液中，纳米α-Al2O3经过气氛热处理生成AlN，当α-Al2O3含量为20％时，涂层的击穿场强高达35．1kV／mm。

英文摘要：

An insulation anti-oxidation coating was prepared on the surface of copper successfully by using Li2O-B203-SiO2 based glass as raw material and nano-α-Al2O3 ceramic powder as reinforcing agent via atmosphere liquid phase sintering technique. The performance of the coating was improved by adjusting the content of the reinforcing agent. The microstructure, composition, electrical properties and oxidation resistance of the coating were studied. The results showed that the coating prepared on the surface of copper was smooth and compact, and the thickness was uniform. The coating and the substrate were firmly bonded. The copper coated with the composite coating was oxidized at 400℃ for 61 h in the air, indi- cating that the copper has no obvious oxidation. In molten glass, nano-α-Al2O3 generated AlN during the heat treatment in nitrogen condition, and the breakdown strength of coating reached 35.1 kV/mm when the Al2O3 content was 20%.