摘要
用国产六面顶压机在5.0GPa,1300℃~1800℃条件下实现了以Y2O3为烧结助剂的AlN陶瓷体的高压烧结。用XRD对AlN高压烧结体的相组成进行了表征。研究表明:高压制备陶瓷体材料能够有效降低烧结温度和缩短烧结时间,可比传统烧结方法降低400℃以上。Y2O3是AlN有效的低温烧结助剂,在1300℃、1400℃烧结的AlN陶瓷体材料第二相物质以YAlO3和Y4AL2O9为主。当烧结温度高于1600℃,AlN陶瓷的第二相物质主要以Y3Al5O12为主。烧结条件为5.0GPa/1700℃/75min,样品的热导率可达135W/(m·K)。
Aluminum nitride ceramics with rare earth oxide as a sintering aid were fabricated under high pressure (5.0 GPa) at a low temperature (1300℃-1800℃) in a Chinamade cubic press apparatus. The characterization of the sintered bodies was determined by XRD. The results showed the method could lower the sintering temperature and shorten the sintering time effectively. The second phase is YAlO3, Y4Al2O9 and Y3Al5O12 when the sintering temperature is 1300℃, 1400℃ and 1500℃ respectively. The thermal conductivity of the samples sintered at 5.0GPa and 1700℃ for 75min can reach 135W/(m · K).
出处
《超硬材料工程》
CAS
2008年第5期21-24,共4页
Superhard Material Engineering
基金
国家自然科学基金项目(50572032)
关键词
高压烧结
ALN陶瓷
热导率
六面顶压机
high pressure sintering
AlN ceramics
thermal conductivity
cubic press apparatus