Li_(2)O对钙硼硅系玻璃陶瓷结构与性能的影响  

Influence of Different Li_(2)O Contents on Microstructure and Properties of CaO-B_(2)O_(3)-SiO_(2) Glass Ceramics

作　　者：韦鹏飞[1] 刘峥[2] 苏文娟[2] 王志成[2] WEI Pengfei;LIU Zheng;SU Wenjuan;WANG Zhicheng(College of Materials Engineering,Jinling Institute of Technology,Nanjing 211169,China;Special Equipment Safety Supervision Inspection Institute of Jiangsu Province,Nanjing 210036,China)

机构地区：[1]金陵科技学院材料工程学院,南京210069 [2]江苏省特种设备安全监督检验研究院,南京210036

出　　处：《中国陶瓷》2022年第9期15-19,共5页China Ceramics

基　　金：国家重点研发计划项目资助(2018YFF0216004)。

摘　　要：采用高温混熔法,制备不同Li_(2)O含量的CaO-B_(2)O_(3)-SiO_(2)玻璃陶瓷。考察Li_(2)O含量对该体系微观形态、烧结特性、介电性能等影响。结果表明:随着Li_(2)O含量增加,试样的烧结温度下降,烧结温度范围先变大后变小,烧结试样体积密度、介电性能、热力学性能都呈现出先增加再恶化的过程。当Li_(2)O含量为0.5mol%时,材料875℃烧结良好,性能优异,体积密度为2.55g·cm^(-1),10MHz频率的相对介电常数6.42,介电损耗1.1×10^(-3),热膨胀系数12.4×10^(-6)K^(-1),机械强度137 MPa。CaO-B_(2)O_(3)-SiO_(2) glass ceramics with different Li_(2)O contents were prepared by high-temperature melting method.The effect of Li_(2)O on microstructure and properties of CaO-B_(2)O_(3)-SiO_(2) system were discussed.The results show that with the increase of Li_(2)O content,the bulk density,dielectric properties,thermal properties and mechanical properties of the sintered samples increase firstly and then deteriorate.By contrast,the material with 0.5mol%Li_(2)O and sintered at 875℃.exhibits better properties of bulk densityρ=2.55g·cm^(-1),ε=6.42,dielectric loss tanδ=1.1×10^(-3)(at 10 MHz),thermal expansion coefficient α=12.4×10^(-6)K^(-1),bend strengthσ=137 MPa..

关 键 词：钙硼硅 Li_(2)O 烧结温度 微观结构 性能 

分 类 号：TQ171.733[化学工程—玻璃工业]