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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-loss, high-resistivity and anti-reduction BaTiO3-based dielectric ceramic and preparation method thereof
The invention discloses an anti-reduction BaTiO3-based dielectric ceramic with low loss and high resistivity, the nominal chemical composition of the dielectric ceramic is 0.95 BaTiO3 <-0.05 > BiCoO3 <-x > wt% MnO2, and x is equal to 0.1-0.5. The preparation method comprises the following main steps: (1) taking BaTiO3, Bi2O3, Co2O3 and MnO2 as raw materials, and proportioning according to a stoichiometric ratio of a nominal composition chemical formula; (2) carrying out ball milling, drying and presintering on the weighed raw materials to obtain ceramic powder; (3) grinding the ceramic powder, carrying out secondary ball milling, drying, mixing with a binder, carrying out ball milling, granulating, sieving, and carrying out dry pressing molding to obtain a ceramic green body; (4) carrying out heat preservation on the ceramic green body in air at 500-700 DEG C for 1.5-3 hours, and discharging the binder; and (5) sintering the ceramic without the binder for 1-3 hours at the temperature of 1200-1300 DEG C in a reducing atmosphere to obtain the anti-reduction BaTiO3-based dielectric ceramic. According to the anti-reduction BaTiO3-based dielectric ceramic and the preparation method, the anti-reduction BaTiO3-based dielectric ceramic has good dielectric property and insulating property, the dielectric property is stable in a wide temperature range, the material system is simple, and the production cost is low.
本发明公开了一种低损耗、高电阻率抗还原BaTiO3基介质陶瓷，名义化学组成为0.95BaTiO3‑0.05BiCoO3‑xwt％MnO2，其中x＝0.1～0.5。其制备方法，主要步骤如下：(1)以BaTiO3、Bi2O3、Co2O3和MnO2作为原料，根据名义组成化学式的化学计量比配料；(2)将称取的原料进行球磨、烘干、预烧，得到陶瓷粉体；(3)将陶瓷粉体研磨后进行二次球磨，烘干后与粘结剂混合球磨，造粒过筛，干压成型得到陶瓷生坯；(4)将陶瓷生坯在空气中500～700℃保温1.5～3小时排出粘结剂；(5)将排完粘结剂的陶瓷在还原气氛下1200～1300℃烧结1～3小时，得到抗还原BaTiO3基介质陶瓷。该抗还原BaTiO3基介质陶瓷及制备方法，具有良好的介电性能和绝缘性能，且在宽温范围内介电性能稳定，材料体系简单，生产成本低。
Low-loss, high-resistivity and anti-reduction BaTiO3-based dielectric ceramic and preparation method thereof
The invention discloses an anti-reduction BaTiO3-based dielectric ceramic with low loss and high resistivity, the nominal chemical composition of the dielectric ceramic is 0.95 BaTiO3 <-0.05 > BiCoO3 <-x > wt% MnO2, and x is equal to 0.1-0.5. The preparation method comprises the following main steps: (1) taking BaTiO3, Bi2O3, Co2O3 and MnO2 as raw materials, and proportioning according to a stoichiometric ratio of a nominal composition chemical formula; (2) carrying out ball milling, drying and presintering on the weighed raw materials to obtain ceramic powder; (3) grinding the ceramic powder, carrying out secondary ball milling, drying, mixing with a binder, carrying out ball milling, granulating, sieving, and carrying out dry pressing molding to obtain a ceramic green body; (4) carrying out heat preservation on the ceramic green body in air at 500-700 DEG C for 1.5-3 hours, and discharging the binder; and (5) sintering the ceramic without the binder for 1-3 hours at the temperature of 1200-1300 DEG C in a reducing atmosphere to obtain the anti-reduction BaTiO3-based dielectric ceramic. According to the anti-reduction BaTiO3-based dielectric ceramic and the preparation method, the anti-reduction BaTiO3-based dielectric ceramic has good dielectric property and insulating property, the dielectric property is stable in a wide temperature range, the material system is simple, and the production cost is low.
本发明公开了一种低损耗、高电阻率抗还原BaTiO3基介质陶瓷，名义化学组成为0.95BaTiO3‑0.05BiCoO3‑xwt％MnO2，其中x＝0.1～0.5。其制备方法，主要步骤如下：(1)以BaTiO3、Bi2O3、Co2O3和MnO2作为原料，根据名义组成化学式的化学计量比配料；(2)将称取的原料进行球磨、烘干、预烧，得到陶瓷粉体；(3)将陶瓷粉体研磨后进行二次球磨，烘干后与粘结剂混合球磨，造粒过筛，干压成型得到陶瓷生坯；(4)将陶瓷生坯在空气中500～700℃保温1.5～3小时排出粘结剂；(5)将排完粘结剂的陶瓷在还原气氛下1200～1300℃烧结1～3小时，得到抗还原BaTiO3基介质陶瓷。该抗还原BaTiO3基介质陶瓷及制备方法，具有良好的介电性能和绝缘性能，且在宽温范围内介电性能稳定，材料体系简单，生产成本低。
Low-loss, high-resistivity and anti-reduction BaTiO3-based dielectric ceramic and preparation method thereof
一种低损耗、高电阻率抗还原BaTiO3基介质陶瓷及制备方法
HAO HUA (Autor:in) / WANG ZHEN (Autor:in) / ZHANG JIE (Autor:in) / LIU HANXING (Autor:in) / YAO ZHONGHUA (Autor:in) / CAO MINGHE (Autor:in)
28.11.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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