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Non-stoichiometric yttrium aluminum garnet microwave dielectric ceramic and preparation method thereof
The invention discloses a non-stoichiometric yttrium aluminum garnet microwave dielectric ceramic and a preparation method thereof. The chemical general formula of the ceramic is Y3+xAl5+yO12, wherein 0<=x<= 0.12, 0<=y<=0.2, and x and y are not 0 at the same time. The preparation method comprises the following steps: ball-milling and mixing for the first time, drying, sieving, forming, vacuum sintering and oxygen annealing. The crystalline phase of the finished product still retains the cubic garnet structure. The microwave dielectric property of the ceramic is regulated and controlled by adjusting the stoichiometric ratio of ions at the site A and the site B, the excellent microwave property with the relative dielectric constant epsilon r adjustable between 9.1 and 12.8 and the Q * f value reaching 195000 GHz-240000 GHz is finally obtained, and the temperature coefficient of resonance frequency tau f is adjustable between -26 ppm/DEG C and -36 ppm/DEG C; and the preparation process is simple, the property is stable, and the application requirements of modern microwave devices are met.
本发明公开了一种非化学计量的钇铝石榴石微波介电陶瓷及其制备方法，该陶瓷的化学通式为Y3+xAl5+yO12，其中，0≤x≤0.12，0≤y≤0.2，且x与y不同时为0。本发明经过第一次球磨混合、干燥、过筛、成型、真空烧结和氧气退火后制成；制成品的晶相仍保留立方石榴石结构。本发明通过调整AB位离子的化学计量比调控了该陶瓷的微波介电性能，最终得出了相对介电常数εr在9.1～12.8之间可调，Q×f值达到195000GHz～240000GHz的优异的微波性能，谐振频率温度系数τf在‑26ppm/℃～‑36ppm/℃之间可调，制备工艺简单，并且性能稳定，满足现代微波器件的应用需求。
Non-stoichiometric yttrium aluminum garnet microwave dielectric ceramic and preparation method thereof
The invention discloses a non-stoichiometric yttrium aluminum garnet microwave dielectric ceramic and a preparation method thereof. The chemical general formula of the ceramic is Y3+xAl5+yO12, wherein 0<=x<= 0.12, 0<=y<=0.2, and x and y are not 0 at the same time. The preparation method comprises the following steps: ball-milling and mixing for the first time, drying, sieving, forming, vacuum sintering and oxygen annealing. The crystalline phase of the finished product still retains the cubic garnet structure. The microwave dielectric property of the ceramic is regulated and controlled by adjusting the stoichiometric ratio of ions at the site A and the site B, the excellent microwave property with the relative dielectric constant epsilon r adjustable between 9.1 and 12.8 and the Q * f value reaching 195000 GHz-240000 GHz is finally obtained, and the temperature coefficient of resonance frequency tau f is adjustable between -26 ppm/DEG C and -36 ppm/DEG C; and the preparation process is simple, the property is stable, and the application requirements of modern microwave devices are met.
本发明公开了一种非化学计量的钇铝石榴石微波介电陶瓷及其制备方法，该陶瓷的化学通式为Y3+xAl5+yO12，其中，0≤x≤0.12，0≤y≤0.2，且x与y不同时为0。本发明经过第一次球磨混合、干燥、过筛、成型、真空烧结和氧气退火后制成；制成品的晶相仍保留立方石榴石结构。本发明通过调整AB位离子的化学计量比调控了该陶瓷的微波介电性能，最终得出了相对介电常数εr在9.1～12.8之间可调，Q×f值达到195000GHz～240000GHz的优异的微波性能，谐振频率温度系数τf在‑26ppm/℃～‑36ppm/℃之间可调，制备工艺简单，并且性能稳定，满足现代微波器件的应用需求。
Non-stoichiometric yttrium aluminum garnet microwave dielectric ceramic and preparation method thereof
非化学计量的钇铝石榴石微波介电陶瓷及其制备方法
TANG BIN (Autor:in) / ZHOU MOKE (Autor:in) / HE YI (Autor:in) / ZHONG CHAOWEI (Autor:in) / ZHANG SHUREN (Autor:in)
03.12.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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