Dielectric properties of (Al3 , Nb5 ) co-doped CaTiSiO5 ceramics at elevated temperature
Dielectric properties of (Al3 , Nb5 ) co-doped CaTiSiO5 ceramics at elevated temperature
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(Al3,Nb5)共掺杂CaTiSiO5陶瓷的高温介电性能
DOI：
10.1016/j.jpcs.2019.04.021
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发表时间：
2019
影响因子：
4
通讯作者：
Li Yongxiang
中科院分区：
文献类型：
--
作者：
Peng Xiaoxiao;Liu Zhifu;Gu Yan;Zhang Faqiang;Li Yongxiang
采用传统固相法制备了CaTi(1-x)(Al0.5Nb0.5)xSiO5(0 ≤ x ≤ 0.1)陶瓷。Al和Nb共掺杂提高了CaTiSiO5材料的高温稳定性，x 0.03CaTiSiO5材料在623 ≥ K以下没有明显的相变。在室温下，CaTi0.97(Al0.5Nb0.5)0.03SiO5陶瓷的介电常数为53，介电损耗为0.001，电阻率为8.5 × 1013Ω cm，击穿强度为1064.7 kV/cm。介电常数在较宽的温度范围内是稳定的，在573K时的电阻率仍可达到9.0 × 1010Ω cm。p-Eloop测试表明，CaTi0.97(Al0.5Nb0.5)0.03SiO5陶瓷在室温和453SiO5温度下的储能效率分别为96%和88.6%。良好的高温介电性能表明，Al和Nb共掺杂稳定的钛基陶瓷有望成为高温陶瓷电容器的候选材料。
The CaTi(1-x)(Al0.5Nb0.5)xSiO5(0 ≤ x ≤ 0.1) ceramics were prepared by the conventional solid-state method. Al and Nb co-doping improved the high temperature stability of the CaTiSiO5material and no obvious phase transition was found at temperature up to 623 K for x ≥ 0.03. A dielectric constant of 53, dielectric loss of 0.001, resistivity of 8.5 × 1013Ω cm, and breakdown strength of 1064.7 kV/cm was obtained for the CaTi0.97(Al0.5Nb0.5)0.03SiO5ceramics at room-temperature. The dielectric constant is stable over a wide temperature range and a resistivity of 9.0 × 1010Ω cm could still be achieved up to 573 K. TheP-Eloops measurements showed that energy storage efficiencies of 96% and 88.6% could be obtained at room-temperature and 453 K, respectively, for the CaTi0.97(Al0.5Nb0.5)0.03SiO5ceramics. The excellent dielectric properties at elevated temperature indicate that titanite based ceramics stabilized by Al and Nb co-doping could be promising candidates for high temperature ceramic capacitors application.