摘要
通过掺入不同含量的B2O3对BaTi0.75Zr0.25O3(BZT)陶瓷进行低温烧结,研究其对介电性能的影响,并采用X射线衍射进行物相分析。结果表明:掺杂B2O3的BZT陶瓷在1 150℃烧结温度下得到的主晶相均为钙钛矿,且不存在明显的杂相。观察试样的表面形貌,当B2O3掺杂量为0%～1.5%时,陶瓷晶粒尺寸逐渐变大,而掺杂量为1.5%～2.5%时,晶粒尺寸稍微变小。随着B2O3含量的增加,BZT陶瓷的介电常数降低,介质损耗略微增大。与未掺杂的BZT陶瓷相比,掺杂B2O3的BZT陶瓷的烧结温度下降了300℃,掺杂1.5%B2O3的BZT陶瓷的结构和介电性能较好。
Through adding different content B2O3,BaZr0.25Ti0.75O3（BZT） ceramics were prepared by conventional ceramic process at a relatively low sintering temperature,and the dielectric properties of the ceramics were studied.The phase of the ceramics was analyzed by X-ray diffraction.The results indicate that the main crystal phase of the BZT ceramic with B2O3 sintered at 1 150 ℃ shows perovskite structure and has no obvious additional phase.Through observing the surface morphology,it was found that the grain size of the ceramic increases gradually with the B2O3 content at 0%～1.5% and decreases slightly with the B2O3content at 1.5%～2.5%.With the increase of B2O3 content,the dielectric constant of the BZT ceramic decreases but the dielectric loss increases slightly.Compared with the pure BZT ceramic,the sintering temperature of the BZT ceramic with B2O3reduces by 300 ℃,and the structure and dielectric properties of the BZT ceramic with 1.5% B2O3show better.
出处
《绝缘材料》
CAS
北大核心
2012年第4期34-37,共4页
Insulating Materials
基金
国家自然科学基金资助项目(50872093)
国家863项目(2012AA03A610)
