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Barium titanate-based dielectric ceramic with wide-temperature stable dielectric constant and preparation method thereof
The invention discloses a barium titanate-based dielectric ceramic with wide-temperature stable dielectric constant. The dielectric ceramic is composed of a matrix component and a doping component, the chemical formula of the matrix component is (1-x)BaTi(1-y)CayO(3-y-x)Bi(Mg0.5Ti0.5)O3, x is 0.1-0.3, y is 0.04-0.05, the chemical formula of the doping component is zNb2O5, and z is 1%-3% of the matrix component by weight. The invention also provides a preparation method of the barium titanate-based dielectric ceramic with stable dielectric constant and wide temperature range. According to the invention, the Bi(Mg1/2Ti1/2)O3-BaTiO3 system has a high dielectric constant by utilizing the effect of B-site doping of Ca<2+> and co-doping of Nb2O5, the low-temperature section performance of the Bi(Mg1/2Ti1/2)O3-BaTiO3 system is well improved, and the Bi (Mg1/2Ti1/2)O3-BaTiO3 system has a wide temperature stability range, and meets the requirements of an X8R type capacitor. The obtained dielectric ceramic is expected to be used as a ceramic material to be applied to a new generation of environment-friendly ceramic with a dielectric constant and stable wide temperature range.
本发明公开了一种介电常数宽温稳定的钛酸钡基介电陶瓷，该介电陶瓷由基质组分和掺杂组分组成，基质组分的化学分子式为(1‑x)BaTi1‑yCayO3‑y‑xBi(Mg0.5Ti0.5)O3，x＝0.1～0.3，y＝0.04～0.05，掺杂组分的化学分子式为zNb2O5，z为以重量计为基质组分的1％～3％。本发明还提供了一种制备上述介电常数宽温稳定的钛酸钡基介电陶瓷的制备方法。本发明利用Ca2+的B位掺杂和Nb2O5两者的共同掺杂的作用，使得Bi(Mg1/2Ti1/2)O3‑BaTiO3体系具有高介电常数，且其低温段性能得到了很好的改善，拥有了宽的温度稳定性范围，也达到了X8R型电容器的要求，所得介电陶瓷有望作为陶瓷材料应用于新一代环境友好的介电常数宽温稳定的陶瓷。
Barium titanate-based dielectric ceramic with wide-temperature stable dielectric constant and preparation method thereof
The invention discloses a barium titanate-based dielectric ceramic with wide-temperature stable dielectric constant. The dielectric ceramic is composed of a matrix component and a doping component, the chemical formula of the matrix component is (1-x)BaTi(1-y)CayO(3-y-x)Bi(Mg0.5Ti0.5)O3, x is 0.1-0.3, y is 0.04-0.05, the chemical formula of the doping component is zNb2O5, and z is 1%-3% of the matrix component by weight. The invention also provides a preparation method of the barium titanate-based dielectric ceramic with stable dielectric constant and wide temperature range. According to the invention, the Bi(Mg1/2Ti1/2)O3-BaTiO3 system has a high dielectric constant by utilizing the effect of B-site doping of Ca<2+> and co-doping of Nb2O5, the low-temperature section performance of the Bi(Mg1/2Ti1/2)O3-BaTiO3 system is well improved, and the Bi (Mg1/2Ti1/2)O3-BaTiO3 system has a wide temperature stability range, and meets the requirements of an X8R type capacitor. The obtained dielectric ceramic is expected to be used as a ceramic material to be applied to a new generation of environment-friendly ceramic with a dielectric constant and stable wide temperature range.
本发明公开了一种介电常数宽温稳定的钛酸钡基介电陶瓷，该介电陶瓷由基质组分和掺杂组分组成，基质组分的化学分子式为(1‑x)BaTi1‑yCayO3‑y‑xBi(Mg0.5Ti0.5)O3，x＝0.1～0.3，y＝0.04～0.05，掺杂组分的化学分子式为zNb2O5，z为以重量计为基质组分的1％～3％。本发明还提供了一种制备上述介电常数宽温稳定的钛酸钡基介电陶瓷的制备方法。本发明利用Ca2+的B位掺杂和Nb2O5两者的共同掺杂的作用，使得Bi(Mg1/2Ti1/2)O3‑BaTiO3体系具有高介电常数，且其低温段性能得到了很好的改善，拥有了宽的温度稳定性范围，也达到了X8R型电容器的要求，所得介电陶瓷有望作为陶瓷材料应用于新一代环境友好的介电常数宽温稳定的陶瓷。
Barium titanate-based dielectric ceramic with wide-temperature stable dielectric constant and preparation method thereof
一种介电常数宽温稳定的钛酸钡基介电陶瓷及其制备方法
LUO GUOQIANG (Autor:in) / ZHANG GANRONG (Autor:in) / ZHANG YING (Autor:in) / LI ANG (Autor:in) / TU RONG (Autor:in) / SHEN QIANG (Autor:in) / ZHANG LIANMENG (Autor:in)
05.11.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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