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Low-dielectric-constant microwave dielectric ceramic with adjustable resonant frequency temperature coefficient and preparation method thereof
The invention discloses a low-dielectric-constant microwave dielectric ceramic with an adjustable resonant frequency temperature coefficient and a preparation method thereof. The chemical compositionof the microwave dielectric ceramic is Ca4ZrGe3-xTixO12, wherein x is more than or equal to 0 and less than or equal to 0.75. A traditional solid-phase reaction sintering method is adopted, and the preparation method is simple. According to the prepared low-dielectric-constant microwave dielectric ceramic with an adjustable resonant frequency temperature coefficient, the resonant frequency temperature coefficient of the ceramic can be effectively optimized through CaTiO3 formed through in-situ compounding under the condition that extra CaTiO3 does not need to be added. Ti<4+> is used to replacr Ge<4+>, the temperature coefficient of resonance frequency can be improved, the use of an expensive raw material GeO2 can be reduced, the process is simple, and industrial large-scale production isfacilitated. The Ca4ZrGe2.5Ti0.5O12 ceramic sintered at 1370 DEG C for 6 hours has excellent microwave dielectric properties that epsilon r is equal to 11.95, Q*f is equal to 45060 GHz, and tau f is equal to +0.4 ppm/DEG C.
本发明公开了一种谐振频率温度系数可调的低介电常数微波介质陶瓷及其制备方法。该微波介质陶瓷的化学组成是Ca4ZrGe3‑xTixO12，其中0≤x≤0.75。本发明采用传统的固相反应烧结法，制备方法简单。本发明制备得到的谐振频率温度系数可调的低介电常数微波介质陶瓷在不需要额外添加CaTiO3的情况下，可通过原位复合形成的CaTiO3来有效优化陶瓷的谐振频率温度系数。利用Ti4+取代Ge4+，不仅可以改善谐振频率温度系数，而且能够减少昂贵的原材料GeO2，工艺简单，有利于工业规模化生产。1370℃烧结6小时的Ca4ZrGe2.5Ti0.5O12陶瓷具有优异的微波介电性能为：εr＝11.95，Q×f＝45060GHz，τf＝+0.4ppm/℃。
Low-dielectric-constant microwave dielectric ceramic with adjustable resonant frequency temperature coefficient and preparation method thereof
The invention discloses a low-dielectric-constant microwave dielectric ceramic with an adjustable resonant frequency temperature coefficient and a preparation method thereof. The chemical compositionof the microwave dielectric ceramic is Ca4ZrGe3-xTixO12, wherein x is more than or equal to 0 and less than or equal to 0.75. A traditional solid-phase reaction sintering method is adopted, and the preparation method is simple. According to the prepared low-dielectric-constant microwave dielectric ceramic with an adjustable resonant frequency temperature coefficient, the resonant frequency temperature coefficient of the ceramic can be effectively optimized through CaTiO3 formed through in-situ compounding under the condition that extra CaTiO3 does not need to be added. Ti<4+> is used to replacr Ge<4+>, the temperature coefficient of resonance frequency can be improved, the use of an expensive raw material GeO2 can be reduced, the process is simple, and industrial large-scale production isfacilitated. The Ca4ZrGe2.5Ti0.5O12 ceramic sintered at 1370 DEG C for 6 hours has excellent microwave dielectric properties that epsilon r is equal to 11.95, Q*f is equal to 45060 GHz, and tau f is equal to +0.4 ppm/DEG C.
本发明公开了一种谐振频率温度系数可调的低介电常数微波介质陶瓷及其制备方法。该微波介质陶瓷的化学组成是Ca4ZrGe3‑xTixO12，其中0≤x≤0.75。本发明采用传统的固相反应烧结法，制备方法简单。本发明制备得到的谐振频率温度系数可调的低介电常数微波介质陶瓷在不需要额外添加CaTiO3的情况下，可通过原位复合形成的CaTiO3来有效优化陶瓷的谐振频率温度系数。利用Ti4+取代Ge4+，不仅可以改善谐振频率温度系数，而且能够减少昂贵的原材料GeO2，工艺简单，有利于工业规模化生产。1370℃烧结6小时的Ca4ZrGe2.5Ti0.5O12陶瓷具有优异的微波介电性能为：εr＝11.95，Q×f＝45060GHz，τf＝+0.4ppm/℃。
Low-dielectric-constant microwave dielectric ceramic with adjustable resonant frequency temperature coefficient and preparation method thereof
谐振频率温度系数可调的低介电常数微波介质陶瓷及其制备方法
SU CONGXUE (author) / FANG LIANG (author) / AO LAIYUAN (author) / WEI QIHANG (author)
2021-02-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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