摘要
低压注射成型制备95氧化铝陶瓷在埋粉热脱脂过程会发生粘粉现象,严重影响陶瓷零件性能,本文提出了一种基于大小粒径混合埋粉对粘粉现象的控制方法,并与传统方式进行了对比分析,混合粒径埋粉在保证了烧成后95氧化铝陶瓷强度和耐压性能的前提下,消除了粘粉现象。该方法具有操作简便、无杂质引入等优点。此外,基于脱脂过程的物相与表面自由能变化,讨论了粘粉的形成机制以及混合粒径埋粉消除粘粉的原理。
The powder adhering that occurred during debinding process of the low-pressure injection molded 95 alumina was a threat to its performance. In this paper, a method of using debinding powder mixed with particles of di fferent sizes for solving powder adhering was presented, and a comparison was done between this and the traditional method. Debinding with the mixed powder entirely prevented the powder adhering on the surface and ensured the capability of 95 alumina ceramic as well, improving its bending strength and dielectric breakdown strength. The debinding method with the mixed powder has the advantages of simple operation and no impurity. Additionally, based on the phase transformation and the change of the surface free energy during the debinding process, this paper discussed the mechanism of the powder adhering and the causation of the powder adhering prevention.
作者
易歆雨
张华力
杜继实
徐万里
黄晓军
雷杨俊
YI Xinyu;ZHANG Huali;DU Jishi;XU Wanli;HUANG Xiaojun;LEI Yangjun(Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 629100, Sichuan, China)
出处
《陶瓷学报》
CAS
北大核心
2019年第2期202-210,共9页
Journal of Ceramics
基金
中国工程物理研究院超精密加工技术重点实验室基金(ZT17001
ZD18001)
关键词
95氧化铝陶瓷
低压注射成型
脱脂
粘粉
95 alumina ceramic
low-pressure injection molding
debinding
powder adhering
