低温热压制备半透明α/βSi_3N_4复相陶瓷  

Preparation of Translucent α/β Si_3N_4 Composite Ceramics by Low-Temperature Hot-Pressing Method

作　　者：梁振华[1] 张海龙[2] 李军[2] 胡坤[1] 彭桂花[1] 

机构地区：[1]广西师范大学化学化工学院,药用资源化学与药物分子工程教育部重点实验室,广西桂林541004 [2]中国科学院上海硅酸盐研究所,上海200050

出　　处：《硅酸盐学报》2012年第12期1717-1720,共4页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50962003;51102053);广西科学研究与技术开发计划应用基础研究专项基金(桂科基0731007);广西自然科学基金(2011GXNSFB018007)资助项目

摘　　要：以α-Si3N4粉为原料、MgSiN2粉为烧结助剂,在1563℃热压1h制备出半透明α/βSi3N4复相陶瓷。X射线衍射分析结果表明,半透明α/βSi3N4复相陶瓷由85%(质量分数,下同)α-Si3N4和15%β-Si3N4组成。半透明α/βSi3N4复相陶瓷具有和Mg-α-SiAlON陶瓷相似的透光性质,样品厚度为0.42mm,其透过率随波长增加而增大,波长在3.3μm处透过率最大,达到66%,在2.0～4.5μm波长范围,透过率保持在50%以上,随后透过率迅速降低,在5.0μm处截止。The translucent α-Si3N4 composite ceramics with α-Si3N4 of 85% （mass fraction, the same is below） and α-Si3N4 of 15% were prepared with α-Si3N4 as raw material and MgSiN2 as an additive by a hot-pressing method at 1563 ℃ for 1 h. The optical transmittance curve of the α-Si3N4 composite ceramics was similar to that of translucent Mg-a-SiAlON ceramic. The transmittance of the α-Si3N4 composite ceramics gradually increased with the increase of wavelength, and achieved the maximum transmittance of 66% at the wavelength of 3.3 gin. The transmittance value was 〉 50% in the wavelength range of 2.0-4.5 μm and the cut-off wave- length of the α-Si3N4 composite ceramics was located at 5.0 pan.

关 键 词：氮化硅 陶瓷 半透明 热压 低温 

分 类 号：TQ174[化学工程—陶瓷工业]