摘要
采田柠檬酸ｓｏｌ－ｇｅｌ工艺合成了ＢａＦｅ１２Ｏ１９／ＳｉＯ－Ｂ２Ｏ３微晶玻璃陶瓷．研究了ＳｉＯ２－Ｂ２Ｏ３玻璃的含量、Ｂａ／Ｆｅ原子比和热处理温度对体系析出晶相的影响，以及介电常数和磁导率在１ＭＨｚ～６ＧＨｚ 频率范围内的变化规律．结果表明，体系中ＳｉＯ２－Ｂ２Ｏ３玻璃的含量和Ｂａ／Ｆｅ比越高，ＢａＦｅ１２Ｏ１９相的析出越困难，前驱体合适的热处理温度为１０００℃；介电常数和磁导率基本上随测试概率的增加而下降；介电损耗的最大值为０．４３，磁损耗较小．
BaFe12O19/SiO2-B2O3 microcrystallite glass ceramics was prepared by citrate sol-gel process. The correlation between BaFe12O19 synthesis and the amount of SiO2-B2O3 and Ba/Fe ratio and thermal treatment temperature was studied. The relationship between complex dielectric constant and complex permeability dispersion and frequency was investigated in the range of 1MHz-6GHz. Results show that those conditions such as ratio of Ba/Fe, sintering temperature, have important effect on the synthesis of BaFe12O19/SiO2-B2O3 microcrystallite glass ceramics, The higher the amount of SiO2-B2O3 and Ba/Fe, the more difficult the formation of BaFe12O19; 900-1000°C was suitable thermal treatment temperature for the formation of BaFe12O19. The complex dielectric constant and complex permeability decrease as the measuring frequency increases, and the maximum dielectric loss is about 0.43, magnetic loss is nearly equal to zero.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2002年第1期31-36,共6页
Chinese Journal of Materials Research
基金
国家自然科学基金重大项目资助59995320.
