透明氮化铝陶瓷的制备

无机材料学报990429

无机材料学报

JOURNAL OF INORGANIC MATERIALS

1999年 第14卷 第4期 Vol.14 No.4 1999

透明氮化铝陶瓷的制备*

周艳平　王岱峰　奚益明　庄汉锐　温树林　郭景坤　严东生

摘　要 本文采用碳热还原法制得的AlN粉，使用烧结剂CaC2，热压制备了透明氮化铝陶瓷. 实验证明，纯度高、粒径较小、且均匀的AlN粉是制备透明AlN陶瓷的必要条件. AlN陶瓷从紫外、可见光到近红外均透明，显微结构研究表明，AlN陶瓷透明是由于晶粒完整规则，紧密排列，晶界干净，而气孔、晶粒内和晶界第二相杂质、缺陷是影响透明度的原因.

关　键　词 透明陶瓷，氮化铝，制备

分　类　号 TQ 133

Preparation of Translucent AlN Ceramics

ZHOU Yan-Ping　WANG Dai-Feng　XI Yi-Ming　ZHUANG Han-Rui

WEN Shu-Lin　GUO Jing-Kun　YAN Dong-Sheng

(Shanghai Institute of Ceramics, Chinese Academy of Sciences　Shanghai 200050　China) Abstract Translucent AlN ceramics were prepared by hot pressing with AlN powder synthesized b y using carbon thermal reducing method and additive CaC2. The experiments show that the AlN powder with high purity, small particle size and narrow size distribution is necessary for translucent AlN ceramics. CaC2 is an effective sintering additive for translucent AlN ceramics, improving the densification of AlN and evaporating cleaning the grain boundary. The product is translucent in the range of ultraviolet to infrared. The microstructure study shows that the translucent reason is the grains of AlN complete growing and closely arranging.

　Key words translucent ceramic，aluminum nitride，preparation

1　引言

1962年R. L. Coble［1］首次报道成功地制备了透明氧化铝陶瓷材料，开辟了陶瓷材料新的应用领域，最为成功的是透明氧化铝陶瓷材料作为高压钠灯的灯管，已获广泛应用. 自此之后，世界上许多研究单位和生产单位均致力于制备新的透明陶瓷的研究与开发. 然而，透明的非氧化物陶瓷的制备较之氧化物陶瓷更加困难，其主要原因有两个：一是它们低的烧结性；二是粉料中高的杂质含量，特别是氧含量. 所以有关非氧化file:///E|/qk/wjclxb/wjcl99/wjcl9904/990429.htm（第 1／6 页）2010-3-23 9:58:26