轻型刚性陶瓷填充材料性能表征及其空间环境效应试验研究

轻型刚性陶瓷因其稳定的介电常数和良好的耐压性能,已经作为填充材料应用于航天器器件中。文章对介质陶瓷材料的结构、组织形貌、力学性能和微波介电性能开展了系统研究,探讨了结构的各向异性对力学性能和电性能的影响。重点对介质陶瓷的空间环境效应开展研究,试验结果发现其具有低的真空出气总质损和可凝挥发物含量,以及一定的空间总剂量辐照耐受能力。陶瓷经历湿热处理后,结构强度出现了一定程度的下降,分析发现是由陶瓷内部含有的少量B_2O_3黏结剂吸水生成硼酸导致。

Test study of properties and space environmental adaptability of light ceramic padding materials

Because of the light weight, the stable dielectric properties and the good electric strength, the ceramic materials are widely used for the padding function in communication products of spacecraft. In this paper, the structure, the morphologies of the fracture surface, and the mechanical and dielectric properties are studied. The influences of the structural anisotropy and the space environment on the mechanical and electrical properties are analyzed. It is shown that the ceramic materials have a low total mass loss (TML), a low collected volatile condensable material (CVCM) content and a high radiation resistance. The strength is found decreasing after the high moisture treatment by the absorption of water, which makes the B₂O₃ react with the water to form boric acids with pretty low strength.