Near infrared transmittance of translucent Si3N4 sintered ceramics

被引：5
|
作者：
Yang, Wenwu [1 ]
Hojo, Junichi [2 ]
Enomoto, Naoya [2 ]
Tanaka, Yumi [2 ]
Inada, Miki [2 ]
机构：
[1] Kyushu Univ, Grad Sch Engn, Dept Chem & Biochem, Fukuoka 8190395, Japan
[2] Kyushu Univ, Fac Engn, Dept Appl Chem, Fukuoka 8190395, Japan
来源：
MATERIALS LETTERS | 2013年 / 96卷
关键词：
Translucent ceramics; Silicon nitride; SiAlON; Near infrared transmittance; Spark plasma sintering; OPTICAL-PROPERTIES; TRANSPARENT; FABRICATION; BETA-SI3N4;
D O I：
10.1016/j.matlet.2013.01.040
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Si3N4 was sintered with AlN-MgO additives by spark plasma sintering. The optical transmittances of sintered bodies were studied in the wavelength range of 0.4-5.5 urn, especially with emphasis on near infrared region. When the additive content was large, the sintered body was composed of alpha-SiAlON and showed high transmittance in both visible and near infrared regions. When the additive content was small, the sintered body was composed of beta-Si3N4 and exhibited high transmittance in visible region but low transmittance in near infrared region. The electron spin resonance spectra indicated that the reduction of near infrared transmittance was due to the absorption by unpaired electrons derived from nitrogen vacancies. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：155 / 157
页数：3
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