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发明公开
CN105645952A 一种小损耗超高压陶瓷电容器用介质材料 有权

一种小损耗超高压陶瓷电容器用介质材料
摘要：
本发明公开了一种小损耗超高压陶瓷电容器用介质材料，所述介质材料的组成按重量百分比计为：BaTiO3 70-90％，SrTiO3 2-20％，CaTiO3 1.5-10％，SrBi2Nb2O9 0.2-5％，Bi3ZrNbO9 2-8％，Nb2O50.05-0.8％，CeO2 0.1-0.6％，ZnO 1-5％，和MnCO3 0.1-0.5％。在本发明中，通过在陶瓷电容器用介质材料中同时掺杂SrBi2Nb2O9和Bi3ZrNbO9而实现了介电常数、介质损耗、直流耐电压、和体积电阻率之间的良好的性能平衡。另外，本发明还提供了一种用于制备陶瓷电容器用介质材料的方法以及所述介质材料的用途。
摘要（英）：

The invention discloses a dielectric material for a low-loss and ultra-high voltage ceramic capacitor. The dielectric material is prepared from the following components in percentage by weight: 70 to 90 percent of BaTiO3, 2 to 20 percent of SrTiO3, 1.5 to 10 percent of CaTiO3, 0.2 to 5 percent of SrBi2Nb2O9, 2 to 8 percent of Bi3ZrNbO9, 0.05 to 0.8 percent of Nb2O5, 0.1 to 0.6 percent of CeO2, 1 to 5 percent of ZnO and 0.1 to 0.5 percent of MnCO3. According to the dielectric material disclosed by the invention, the SrBi2Nb2O9 and the Bi3ZrNbO9 are simultaneously doped in the dielectric material for the ceramic capacitor, so that good performance balance among a dielectric constant, dielectric loss, direct current withstanding voltage and volume resistivity is realized. In addition, the invention also provides a method for preparing the dielectric material for the ceramic capacitor and application of the dielectric material.

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