材料工程2025，Vol.53Issue(5)：145-151,7.DOI:10.11868/j.issn.1001-4381.2023.000766
钛酸钙镁微波介质陶瓷的低温烧结及介电性能
Low-temperature sintering and dielectric properties of calcium magnesium titanate microwave dielectric ceramics
摘要
Abstract
In this study,0.95MgTiO3-0.05CaTiO3 powders are synthesized via a high-temperature solid-phase reaction,utilizing TiO2,CaCO3,and Mg(OH)2 as the primary reactants.Guided by the phase diagram,sintering aids comprising Li2B4O7-Al2O3,which possess a low melting point,are formulated to facilitate the low-temperature sintering process of 0.95MgTiO3-0.05CaTiO3 microwave dielectric ceramics.The study comprehensively investigates the influence of the synthesis temperature(900-1100℃)on the phase composition of calcium magnesium titanate powder,as well as the effects of sintering temperature(1175-1250℃)and aid content(1%-5%,mass fraction,the same below)on the density,microstructure,dielectric constant,quality factor,and frequency-temperature coefficient of calcium magnesium titanate ceramics.The results indicates that 0.95MgTiO3-0.05CaTiO3 powders could be successfully synthesized at a reaction temperature of 1100℃.The incorporation of sintering aids effectively reduced the sintering temperature of the ceramics.However,excessive addition(5%)resulted in decreased density and dielectric properties.Optimal performance is achieved with an aid content of 3%and a sintering temperature of 1225℃,producing 0.95MgTiO3-0.05CaTiO3 ceramic with a relative density of 98.70%,a dielectric constant of 20.38,a quality factor of 37240 GHz,and a frequency-temperature coefficient of-9.6×10-6℃-1.关键词
钛酸钙镁/微波介质陶瓷/低温烧结/介电性能/频率温度系数Key words
calcium magnesium titanate/microwave dielectric ceramic/low-temperature sintering/dielectric property/temperature coefficient of frequency分类
通用工业技术引用本文复制引用
林玮,刘政,王一巍,匡健磊..钛酸钙镁微波介质陶瓷的低温烧结及介电性能[J].材料工程,2025,53(5):145-151,7.基金项目
北京科技大学教改重点项目(JG2022Z07,JG2020M08) （JG2022Z07,JG2020M08）
