Ba_(4)Ti_(13)O_(30)陶瓷的制备及其介电性能表征  

Fabrication of Ba_4Ti_(13)O_(30)ceramic and characterization of its dielectric property

作　　者：王家强 赵泽颖 金灯仁[1] WANG Jia-qiang;ZHAO Ze-ying;JIN Deng-ren(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444

出　　处：《现代化工》2024年第5期182-186,193,共6页Modern Chemical Industry

摘　　要：利用烧结过程中固相反应产生的额外烧结推动力,在1200℃、常压烧结的条件下,通过混相烧结的方法成功制备了晶粒均匀、致密的纯相Ba_(4)Ti_(13)O_(30)陶瓷,研究了Ba_(4)Ti_(13)O_(30)相的合成规律、烧结性能及其显微结构的演变规律,并表征了Ba4Ti13O30材料的介电性能。结果表明,用固相反应法合成的BaTiO_(3)粉体与TiO_(2)在1150℃下即可合成Ba_(4)Ti_(13)O_(30)相,且在1150~1250℃温度范围内均生成单相。当烧结温度为1200℃时,Ba_(4)Ti_(13)O_(30)陶瓷的相对密度达到最大值95%,此时试样的微波性能最佳,其介电常数和品质因数Q×f分别为40和66273,其品质因数Q×f值远高于文献报道的13000;但当烧结温度提高到1230℃时陶瓷试样体密度略有下降并出现晶粒异常长大的现象,微波性能也随之急剧恶化,这是由其显微结构的变化所致。Dense Ba_(4)Ti_(13)O_(30)ceramic with uniform grains and pure phase is successfully fabricated via a mixed-phase sintering method at 1200℃and normal pressure,which making use of the additional sintering impetus provided by the solid-phase reaction during the solid-phase sintering process.The phase formation rule,sintering performance and microstructure evolution rule of Ba_(4)Ti_(13)O_(30)ceramic are studied,and the dielectric property is characterized.Results show that Ba_(4)Ti_(13)O_(30)phase can be synthesized at 1150℃by using BaTiO_(3)powder synthesized through the solid-phase reaction method and with TiO_(2)powder as regent.A single phase has been always formed during the temperature range of 1150-1250℃.As the sintering temperature is 1200℃,the relative density of Ba_(4)Ti_(13)O_(30)ceramic obtained reaches a maximum value of 95%,its microwave property is the best,and its dielectric constant and figure of merit Q×f are 40 and 66273,respectively.Its quality factor is much higher than 13000,the reported value.However,when the sintering temperature increases slightly to 1230℃,the relative density of the ceramic sample decreases slightly,the phenomenon of abnormal grain growth occurs,and the microwave property deteriorates sharply,possibly caused by the change of its microstructure.

关 键 词：Ba_(4)Ti_(13)O_(30)陶瓷 相合成 混相烧结 介电性能 微波性能 

分 类 号：TM28[一般工业技术—材料科学与工程]