95瓷金属化及上袖新工艺的研究-IAEA.PDF

CNIC-01916 8KI-OOOl 95 瓷金属化及上袖新工艺的研究 周群王琦 (核工业第八研究所，上海， 201800) 摘要 电加热器是核电站稳压器中的高可靠性部件。因其具有特殊的 环境和使用要求，它的接插件采用秸化 95 瓷与特种金属封接的方 式 o 由于在传统的封接工艺中，都是先将陶瓷上好手由，再以采由化后的 陶瓷进行金属化封接，这样就常常导致来由化瓷在高温金属化时发生 飞来由而失去光洁的秘亩，而对能耐金属化高温的瓷秸配方的研究无 法得到理想的结果。同时，进行低温金属化试验得到的封接强度也 太低O 在此情形下 9 依据现有条件 9 本文提出了一种有别传统的陶瓷 金属化与上秸的新工艺一一一-先金属化后上袖，既保证了高温金属化 带来的较高的封接强度曹又避免了高温中发生飞秸现象 c 经过多种 比较和试验，证明这种工艺是可行的，检验数据表明可以满足需要。 此项研究已在接插件上得到初步应用 O 关键词: 95 瓷瓷袖金属化 87 Study on 9S alumina ceramic metallizing and glazing technique (In Chinese) ZHOU Qun WANG Wei (The 8th Research Institute , CNNC , Shanghai , 201800) ABSTRACT Electric heater is a component of pressurizer in NPP. So the connector of heater must suit for special requirement with high reliability. It need join 95 % al umina ceramic and special metal together. Traditional technique is to glazing ceramic at first , then sintering metal powder on ceranlic. It result in melting glaze when metallizing at high temperature. The research on high temperatue glaze hasn t got ideal result. In another way , the experiments prove low tem- perature metallizing couldn t get enough strength. Base on present conditions , a new technique is introduced. It is first metallizing then glazing. It can not on- ly provide high strength with high temperature metallizing , but also avoid melting glaze at high temperature. Compared with other ways , the experiments prove it is feasible. The test data can satisfy requirement.