首页期刊信息编委及顾问期刊发行联系方式使用帮助常见问题ENGLISH
位置：首页 >> 正文
Dy2O3–CaF2对AlN陶瓷制备、结构及性能的影响
作者：汪暾1 谢建军1 戴圣洪1 丁毛毛1 王宇1 2 施誉挺1 周鼎3 施鹰1 
单位：1. 上海大学材料科学与工程学院 上海 200072 2. 上海宇昂化工科技发展有限公司 上海 200124  3. 上海应用技术大学材料科学与工程学院 上海 200235 
关键词：氮化铝陶瓷 烧结助剂 热导率 无压烧结 
分类号：TQ174.75
出版年,卷(期):页码：2018,46(6):0-0
DOI：10.14062/j.issn.0454-5648.2018.06.02
摘要：

 以AlN粉体为原料，采用无压烧结，选取二元烧结助剂Dy2O3–CaF2在1 800 ℃氮气气氛下烧结AlN陶瓷，利用Archimedes排水法、X射线衍射、扫描电子显微镜、激光导热分析仪和万能材料试验机对烧结的AlN陶瓷的密度、热性能和力学性能进行了测试，并对AlN陶瓷的物相变化和微观结构进行了表征。结果表明：添加二元烧结助剂Dy2O3–CaF2可以有效促进AlN陶瓷致密化以及晶粒的生长发育，降低AlN陶瓷的烧结温度，改善AlN陶瓷的导热性能。当添加2.5%(质量分数)Dy2O3+1.5%(质量分数)CaF2在1 800 ℃氮气气氛下常压烧结2 h时，制备出了晶粒发育良好、结晶良好，相对密度99.6%，热导率169 W/(m•K)，同时具有较高的机械强度的AlN陶瓷。

 AlN ceramic was pressureless-sintered in nitrogen at 1 800 ℃ with Dy2O3–CaF2 as binary additives. The density, thermal properties, mechanical and phase change and microstructure of sintered AlN ceramic were characterized by the Archimeds drainage method, X-ray diffraction, scanning electron microscopy, laser thermal conductivity analysis and universal testing machinery. The results show that the binary sintering aids Dy2O3–CaF2 can promote the grain growth and AlN densification, and improve the thermal conductivity of AlN ceramic. AlN ceramic with 2.5% (in mass fraction) Dy2O3+1.5% (in mass fraction) CaF2 was pressureless-sintered in nitrogen at 1 800 ℃ for 2 h. The relative density and thermal conductivity of AlN ceramic is 99.6% and 169 W/(m•K), respectively, and AlN ceramic with the growth-well grains has a high mechanical strength.
基金项目：
上海市科研能力建设项目(14520500300)
作者简介：
参考文献：

 [1] SHEPPARD L M. Aluminum nitride: a versatile but challenge material[J]. J Am Ceram Soc, 1990,69(11): 1801–1803.

[2] MAKINO Y, YOSHIOKA T, NAKANO H, et al. Roles of rare earth oxide additives in millimeter-wave sintering of AlN[J]. J Rare Earths, 2008, 26(2): 141–145.
[3] 金奇杰, 慕玮, 袁文杰, 等. 无压烧结高导热AlN陶瓷的研究进  展[J]. 硅酸盐通报, 2013, 32(7): 1318–1329.
JIN Qijie, MU Wei, YUAN Wenjie, et al. Bull Chin Ceram Soc (in Chinese), 2013, 32(7): 1318–1329.
[4] WATARI K, ISHIZAKI K, TSUCHIYA F. Phonon scattering and thermal conduction mechanisms of sintered aluminium nitride ceramics[J]. J Mater Sci, 1993, 28(14): 3709–3714.
[5] DU X, QIN M, FARID A, et al. Study of rare-earth oxide sintering aid systems for AlN ceramics[J]. Mater Sci Eng A, 2007, 460–461: 471–474.
[6] QIAO L, ZHOU H, FU R. Thermal conductivity of AlN ceramics sintered with CaF2, and YF3[J]. Ceram Int, 2003, 29(8): 893–896. 
[7] LIU Y, ZHOU H, WU Y, et al. Improving thermal conductivity of aluminum nitride ceramics by refining microstructure[J]. Mater Lett, 2000, 43(3): 114–117.
[8] XIONG Y, WANG H, FU Z. Transient liquid-phase sintering of AlN ceramics with CaF2, additive[J]. J Eur Ceram Soc, 2013, 33(11): 2199–2205.
[9] 周和平, 周劲松. 添加CaF2–Y2O3的AlN陶瓷的显微结构及热导性质[J]. 无机材料学报, 1995, 4: 439–444.
ZHOU Heping, ZHOU Jinsong. J Inorg Mater (in Chinese), 1995, 4: 439–444.
 
服务与反馈：
【文章下载】【加入收藏】
中国硅酸盐学会《硅酸盐学报》编辑室
京ICP备10016537号-2
京公网安备 11010802024188号
地址：北京市海淀区三里河路11号    邮政编码：100831
电话：010-57811253  57811254    
E-mail:jccs@ceramsoc.com