摘要
目的制备Ba_(0.97)Gd_(0.02)TiO_3细晶陶瓷。方法采用常压水相法有效控制了单分散亚微米球形Ba_(0.97)Gd_(0.02)TiO_3粉体的粒径大小和均匀性,并制备得到Ba_(0.97)Gd_(0.02)TiO_3细晶陶瓷。利用XRD、TEM和SEM等表征分析了样品的物相及微观形貌,并研究了Ba_(0.97)Gd_(0.02)TiO_3陶瓷的介电性能。结果Ba_(0.97)Gd_(0.02)TiO_3粉体粒径主要分布在230~300nm范围,粒径大小均一。同时,Ba_(0.97)Gd_(0.02)TiO_3细晶陶瓷的室温介电常数提高到2 983,居里峰展宽,温度稳定性明显改善。结论常压水相法可很好的控制Ba_(0.97)Gd_(0.02)TiO_3粉体的形貌,进而得到细晶陶瓷材料且性能有所改善。
Purposes—To prepare fine-grained Ba_(0.97)Gd_(0.02)TiO_3 ceramics.Methods—The hydrophase method was used to control the dispersion and particle size of Ba_(0.97)Gd_(0.02)TiO_3 particles,and fine-grained Ba_(0.97)Gd_(0.02)TiO_3 ceramics was obtained.The phase and microstructure of samples are analyzed by using X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM)and energy-dispersive spectroscopy.The dielectric properties of the ceramics were investigated.Results—It is found that the distribution of monodispersed submicron Ba_(0.97)Gd_(0.02)TiO_3 particles was narrow(230~300 nm)and their sizes were uniform.Dense and fine-grained Ba_(0.97)Gd_(0.02)TiO_3 ceramics obtained by sintering has a permittivity of 2 983,Curie peak broadening and temperature stability were improved obviously.Conclusion—The hydro-phase method can control morphology of the Ba_(0.97)Gd_(0.02)TiO_3 powder very well,and the obtained fine-grain ceramics has improved performance.
出处
《宝鸡文理学院学报(自然科学版)》
CAS
2017年第1期22-28,49,共7页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
基金
陕西省教育厅项目(16JK1040)
宝鸡文理学院校级重点项目(ZK16054)
关键词
常压水相法
球形粉体
细晶陶瓷
介电常数
hydro-phase method at atmospheric pressure
spherical particles
fine-grained ceramics
dielectric constant