温梯法生长掺碳强韧化蓝宝石单晶的研究

doi:10.3724/SP.J.1077.2013.12149

无机材料学报 ›› 2013, Vol. 28 ›› Issue (3): 307-311.DOI: 10.3724/SP.J.1077.2013.12149 CSTR: 32189.14.SP.J.1077.2013.12149

温梯法生长掺碳强韧化蓝宝石单晶的研究

胡克艳^1,2, 徐军², 唐慧丽², 李红军², 邹宇琦², 杨秋红¹

(1. 上海大学电子信息材料系, 上海 200072; 2.中国科学院上海硅酸盐研究所, 上海 201800)

收稿日期:2012-03-07 修回日期:2012-07-09 出版日期:2013-03-20 网络出版日期:2013-02-20
作者简介:胡克艳(1983–), 男, 博士研究生. E-mail: Hukeyan123@126.com
基金资助:
上海市科学技术委员会(10ZR1434200); 国家自然科学基金(61177037)

Study on Methods to Strenthen and Toughen Sapphire Crystal by Carbon Doped Grown by Temperature Gradient Technique (TGT)

HU Ke-Yan^1,2, XU Jun², TANG Hui-Li², LI Hong-Jun², ZOU Yu-Qi², YANG Qiu-Hong¹

(1. Department of Electronic Imformation Materials, Shanghai University, Shanghai 200072, China; 2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China)

Received:2012-03-07 Revised:2012-07-09 Published:2013-03-20 Online:2013-02-20
About author:HU Ke-Yan. E-mail: Hukeyan123@126.com
Supported by:
Shanghai Science and Technology Commission (10ZR1434200); National Natural Science Foundation of China (61177037)

摘要/Abstract

摘要： 研究了温梯法生长不同浓度石墨碳掺杂蓝宝石单晶的室温力学性能。实验发现在蓝宝石单晶中, 掺入适量石墨碳可以显著提高晶体常温断裂强度和断裂韧性, 而不损害晶体的可见和近红外透过性能。当其掺入的石墨浓度为5×10^-3时, 蓝宝石单晶的断裂强度和断裂韧性平均分别提高到752 MPa和2.81 MPa·m1/2, 而其可见和近红外透过率依然达80%。掺杂的石墨碳在蓝宝石晶体中部分作为晶格间隙离子, 对蓝宝石单晶的开裂具有钉扎作用, 达到提高蓝宝石单晶常温力学性能的效果。但是过量石墨碳的掺杂会引起掺质的组分偏析, 晶体中出现碳包裹物, 从而导致晶体力学性能和光学性能的下降。

关键词: 蓝宝石单晶, 强韧化, 掺碳, 温梯法

Abstract: Mechanical properties of carbon-doped sapphire crystals with different carbon concentrations were studied at room temperature. The present work showed that the fracture strength and fracture toughness of as grown crystals were significantly improved by carbon doping and the visible-infrared optical property did not adversely affect. When the concentration of doped carbon was 5×10^-3, the fracture strength and fracture toughness were increased to 752 MPa and 2.81 MPa·m1/2 in average, respectively, and the transmition of visible-infrared was about 80%. Appropriate carbon dopant in the crystals played the roles of clearance ions and created blocking effect to the sapphires cracking, which improved fracture strength and fracture toughness of sapphires at room temperature. However the mechanical properties and optical properties declined when carbon dopant was excessive, due to carbon inclusions grown from composition segregation.

Key words: sapphire crystal, carbon doped, mechanical properties, temperature gradient technique (TGT)

中图分类号:

TG174

胡克艳, 徐军, 唐慧丽, 李红军, 邹宇琦, 杨秋红. 温梯法生长掺碳强韧化蓝宝石单晶的研究[J]. 无机材料学报, 2013, 28(3): 307-311.

HU Ke-Yan, XU Jun, TANG Hui-Li, LI Hong-Jun, ZOU Yu-Qi, YANG Qiu-Hong. Study on Methods to Strenthen and Toughen Sapphire Crystal by Carbon Doped Grown by Temperature Gradient Technique (TGT)[J]. Journal of Inorganic Materials, 2013, 28(3): 307-311.

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温梯法生长掺碳强韧化蓝宝石单晶的研究

Study on Methods to Strenthen and Toughen Sapphire Crystal by Carbon Doped Grown by Temperature Gradient Technique (TGT)

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