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材料研究学报  2012, Vol. 26 Issue (5): 515-520    
  研究论文 本期目录 | 过刊浏览 |
Li2CO3改性CBS/Al2O3玻璃--陶瓷的性能
方一航1, 杨清华1, 李宏伟1, 王焕平1, 马红萍2, 徐时清1
1.中国计量学院材料科学与工程学院 杭州 310018
2.浙江科技学院机械与汽车工程学院 杭州 310023
Low Temperature Sintering and Performance of CBS/Al2O3 Glass–Ceramic Doped With Li2CO3
FANG Yihang1, YANG Qinghua1, LI Hongwei1, WANG Huanping1, MA Hongping2, XU Shiqing1
1.College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018
2.School of Mechanical & Automotive Engineering, Zhejiang University of Science and Technology, Hangzhou 310023
引用本文:

方一航 杨清华 李宏伟 王焕平 马红萍 徐时清. Li2CO3改性CBS/Al2O3玻璃--陶瓷的性能[J]. 材料研究学报, 2012, 26(5): 515-520.
. Low Temperature Sintering and Performance of CBS/Al2O3 Glass–Ceramic Doped With Li2CO3[J]. Chinese Journal of Materials Research, 2012, 26(5): 515-520.

全文: PDF(947 KB)  
摘要: 

以CaO--B2O3--SiO2(CBS)玻璃粉体和Al2O3陶瓷粉体为原料, 在CBS/Al2O3质量比固定为50/50的玻璃--陶瓷中添加适量的Li2CO3作为烧结助剂, 研究了Li2CO3添加量对CBS/Al2O3玻璃--陶瓷的烧结性能、机械性能以及介电性能的影响。结果表明, Li2CO3可改善CBS玻璃的结构, 降低其软化点温度和黏度, 与Al2O3反应生成低共熔相LiAlO2; 这些因素的协同作用促进了CBS/Al2O3玻璃--陶瓷的致密化进程, 在830℃烧结即能获得结构较致密、气孔较少的CBS/Al2O3玻璃--陶瓷。但是, 添加过量的Li2CO3将因锂化合物的挥发而恶化CBS/Al2O3玻璃--陶瓷的烧结性能、介电性能及机械性能。当Li2CO3添加量(质量分数)为0.50%时, 在830℃烧结后获得结构最为致密的CBS/Al2O3玻璃--陶瓷, 其密度为2.76 g•cm-3, 并具有良好的介电性能和机械性能。

关键词 inorganic non–metallic materialsCBS/Al2O3glass–ceramiclow temperature sintering    
Abstract

CBS/Al2O3 glass–ceramic was prepared by using CaO–B2O3–SiO2 (CBS) glass and Al2O3 powders as the raw materials with the mass ratio of 50/50, and the influence of the additive of Li2CO3 on the sintering property, dielectric property and mechanical properties of CBS/Al2O3 composites was investigated. The results show that the additive of Li2CO3 can lower the softening point and viscosity of CBS glass by modifying the structure of CBS glass, and can react with Al2O3 to form low melting phase of Li2AlO2, which can promote the sintering process of CBS/Al2O3 glass–ceramic and result in lowering down the sintering temperature to 830 . However, the excess Li2CO3 can deteriorate the dielectric property and mechanical properties of CBS/Al2O3 glass–ceramic because of the volatilization of Li–compounds. With 0.50% Li2CO3 addition, the CBS/Al2O3 glass–ceramic could be sintered at 830℃ and obtained excellent properties.

Key wordsinorganic non–metallic materials    CBS/Al2O3    glass–ceramic    low temperature sintering
收稿日期: 2012-08-06     
ZTFLH:  TQ174,TB321  
基金资助:

浙江省重点科技创新团队2010R50016和浙江省自然科学基金Y1110648资助项目。

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