Medium-temperature sintered high-dielectric-constant microwave dielectric ceramic material as well as preparation method and application thereof: Fid-Bau Portal

Medium-temperature sintered high-dielectric-constant microwave dielectric ceramic material as well as preparation method and application thereof

YOSHIGISHI / KIM JIN YONG / ZHANG BIN

Abstract

The invention discloses a medium-temperature sintered high-dielectric-constant microwave dielectric ceramic material as well as a preparation method and application thereof. The composition expression of the microwave dielectric ceramic material is aMgO-bTiO2-cCaCO3-dMnO2-eCo2O3-fNb2O5, and a is greater than or equal to 40 mol% and less than or equal to 45 mol%, b is greater than or equal to 40 mol% and less than or equal to 45 mol%, c is greater than or equal to 5.5 mol% and less than or equal to 15 mol%, d is greater than or equal to 0.5 mol% and less than or equal to 1 mol%, e is greater than or equal to 1 mol% and less than or equal to 2 mol%, and f is greater than or equal to 1 mol% and less than or equal to 2 mol%. The microwave dielectric ceramic material disclosed by the invention can keep the following microwave properties under a medium-temperature sintering condition: epsilon r = 30 +/-1, Qfgt; and tau f is adjustable, meets the requirement within +/-30ppm/DEG C, can meet the technical requirements in the field of signal isolation in microwave mobile communication, and has important industrial application value.

本发明公开了一种中温烧结高介电常数微波介质陶瓷材料及其制备方法和应用；该微波介质陶瓷材料的组成表达式为aMgO‑bTiO2‑cCaCO3‑dMnO2‑eCo2O3‑fNb2O5，其中，40mol％≤a≤45mol％，40mol％≤b≤45mol％，5.5mol％≤c≤15mol％，0.5mol％≤d≤1mol％，1mol％≤e≤2mol％，1mol％≤f≤2mol％。本发明的微波介质陶瓷材料可以在中温烧结的条件下保持以下的微波性能：εr＝30±1，Qf>20000GHz，τf可调并且符合±30ppm/℃以内的要求，可满足微波移动通信中信号隔离领域的技术需求，具有重要的工业应用价值。

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