不同稀土掺杂α-sialon陶瓷的透光性

无机材料学报

不同稀土掺杂α-sialon陶瓷的透光性

苏新禄¹; 王佩玲¹; 陈卫武¹; 程一兵²

1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海 200050; 2. 澳大利亚Monash大学应用物理及材料工程学院

收稿日期:2003-07-14 修回日期:2003-08-27 出版日期:2004-07-20 网络出版日期:2004-07-20

Optical Properties of α-sialon Doped with Different Earth Elements

SU Xin-Lu¹; WANG Pei-Ling¹; CHEN Wei-Wu¹; CHENG Yi-Bing²

1.State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China; 2.School of Physics and Materials Engineering; Monash University; Clayton; Victoria 3800; Australia

Received:2003-07-14 Revised:2003-08-27 Published:2004-07-20 Online:2004-07-20

摘要/Abstract

摘要： 利用放电等离子烧结(SPS)及1700℃高温热处理7和17h,研究了组份为R_0.33Si_9.3Al_2.7O_1.7N_14.3(R=Gd,Y和Er)的α-sialon在4000～1500cm-1(2.5～6.6μm)范围的光学透过率。结果表明,经SPS烧结的样品不但达到致密化,且样品中α-sialon晶粒的尺寸分布均匀。在SPS样品中,以Y₂O₃掺杂α-sialon的透光性最好。样品厚度为0.5mm时最高透过率达到56％.热处理7h由于第二相的形成导致透过率下降,但合适的热处理条件能提高样品的透过率,例如Gd117的红外最高透过率从SPS后的47%提高到561%.

关键词: α-sialon, 多晶陶瓷, 透光性

Abstract: By spark plasma sintering (SPS) and post-sintering heat treatments at 1700℃ for 7h and 17h
respectively, the optical transmission of R_0.33Si_9.3Al_2.7O_1.7N_14.3 (R=Gd, Y and Er) in 4000～1500cm^-1 (2.5～6.6μm) was studied.
The results indicate that fully densified specimens obtained by SPS are with homogenous distributed α’ grains. Among three SPS-ed specimens, Y
α-sialon ceramic has the highest transmittance and it reaches 56% for the specimen with 0.5mm in thickness. The heat treatment for 7h causes
the decrease in optical transmittance due to the formation of the second crystallized phase in the specimens. The optical
transmittance of specimens can be improved by suitable heat treatment, and the maximum optical transmittance value of Gd117 can be increased from 47% as
SPS-ed to 56% after heat-treated at 1700℃ for 17h.

Key words: α-sialon, polycrystalline ceramics, optical transmission

中图分类号:

TQ174

苏新禄,王佩玲,陈卫武,程一兵. 不同稀土掺杂α-sialon陶瓷的透光性[J]. 无机材料学报.

SU Xin-Lu,WANG Pei-Ling,CHEN Wei-Wu,CHENG Yi-Bing. Optical Properties of α-sialon Doped with Different Earth Elements[J]. Journal of Inorganic Materials.

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