| ZrO_2掺杂BaO-La_2O_3-TiO_2陶瓷预烧温度研究 |
| |
| 引用本文： | 高旭芳,丘泰.ZrO_2掺杂BaO-La_2O_3-TiO_2陶瓷预烧温度研究[J].电子元件与材料,2010,29(2). |
| |
| 作者姓名： | 高旭芳 丘泰 |
| |
| 作者单位： | 南京工业大学,材料科学与工程学院,江苏,南京,210009 |
| |
| 摘 要： | 采用固相反应法,在不同温度(1100~1250℃)下预烧后烧结制备了Ba4La9.33(Ti0.95Zr0.05)18O54微波介质陶瓷,研究了预烧温度对其相组成、显微结构以及微波介电性能的影响。结果表明:不同预烧温度下制备的陶瓷样品主晶相均为类钨青铜结构的BaLa2Ti4O12晶相。1200℃预烧制备的陶瓷样品晶粒为典型的柱状晶,分布均匀,且晶粒尺寸最大。1200℃预烧后,于1400℃烧结制备的陶瓷样品具有最佳的微波介电性能:εr=86.83,Q·f=5875GHz(4.482GHz),τf=81.99×10–6/℃。
|
| 关 键 词： | 微波介质陶瓷 BaO-Ln2O3-TiO2 预烧温度 类钨青铜结构 |
Research on calcining temperature of ZrO_2 doped BaO-La_2O_3-TiO_2 ceramics |
| |
| GAO Xufang,QIU Tai.Research on calcining temperature of ZrO_2 doped BaO-La_2O_3-TiO_2 ceramics[J].Electronic Components & Materials,2010,29(2). |
| |
| Authors: | GAO Xufang QIU Tai |
| |
| Affiliation: | College of Materials Science and Engineering;Nanjing University of Technology;Nanjing 210009;China |
| |
| Abstract: | Ba_4La_(9.33)(Ti_(0.95)Zr_(0.05))_(18)O_(54) microwave dielectric ceramics calcined at different temperatures fom 1 100 ℃ to 1 250 ℃ were prepared using the solid state reaction method.The effects of the precalcining temperature on the phase composition, microstructure and microwave dielectric propereies of prepared ceramics were studied.The results show that the main crystal phase of prepared ceramics calcined at different temperatures all are BaLa_2Ti_4O_(12) tungstenbronze-like structure.The prepared ceramic calcined at 1 200 ℃ possesses well-distributed typical columnar grains and the largest grain size.Optimal microwave dielectric properties are obtained with ε_r of 86.83,Q·f value of 5 875 GHz (at 4.482 GHz) and τ_f of 81.99 ×10~(-6)/ ℃ when the prepared ceramic is calcined and sintered at 1 200 ℃ and 1 400 ℃, respectively. |
| |
| Keywords: | microwave dielectric ceramic BaO-Ln2O3-TiO2 calcining temperature tungstenbronze-like structure |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
