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Microwave dielectric ceramic material and preparation method thereof
The invention belongs to the technical field of materials, and particularly relates to a microwave dielectric ceramic material and a preparation method thereof. According to the preparation method, aluminum oxide whiskers are doped in magnesium titanate-calcium titanate ceramic, and the aluminum oxide whiskers have relatively high mechanical strength and relatively high elastic modulus, so that the aluminum oxide whiskers have reinforcing and toughening effects after being added into the magnesium titanate and calcium titanate ceramic, and the thermal shock resistance of the obtained microwave dielectric ceramic material can be greatly improved to 165 DEG C. The microwave dielectric ceramic material is low in cost and excellent in microwave dielectric property, the dielectric constant epsilonr is 18-22, the quality factor Qf is larger than or equal to 60000 GHz, the frequency temperature coefficient Tf is close to zero (+/-5 ppm/DEG C), and the microwave dielectric ceramic material has higher reliability and good application prospects.
本发明属于材料技术领域，具体涉及一种微波介质陶瓷材料及其制备方法。本发明通过在钛酸镁‑钛酸钙陶瓷中掺杂氧化铝晶须，由于氧化铝晶须具有较高的机械强度和较高的弹性模量，将其加入钛酸镁‑钛酸钙陶瓷中具有补强增韧的作用，可将所得微波介质陶瓷材料的抗热震性能大幅提升至165℃。本发明提供的微波介质陶瓷材料成本较低，且微波介电性能优异，介电常数εr为18‑22，品质因数Qf≥60000GHz，频率温度系数Tf近零(±5ppm/℃)，具有更高的可靠性，应用前景良好。
Microwave dielectric ceramic material and preparation method thereof
The invention belongs to the technical field of materials, and particularly relates to a microwave dielectric ceramic material and a preparation method thereof. According to the preparation method, aluminum oxide whiskers are doped in magnesium titanate-calcium titanate ceramic, and the aluminum oxide whiskers have relatively high mechanical strength and relatively high elastic modulus, so that the aluminum oxide whiskers have reinforcing and toughening effects after being added into the magnesium titanate and calcium titanate ceramic, and the thermal shock resistance of the obtained microwave dielectric ceramic material can be greatly improved to 165 DEG C. The microwave dielectric ceramic material is low in cost and excellent in microwave dielectric property, the dielectric constant epsilonr is 18-22, the quality factor Qf is larger than or equal to 60000 GHz, the frequency temperature coefficient Tf is close to zero (+/-5 ppm/DEG C), and the microwave dielectric ceramic material has higher reliability and good application prospects.
本发明属于材料技术领域，具体涉及一种微波介质陶瓷材料及其制备方法。本发明通过在钛酸镁‑钛酸钙陶瓷中掺杂氧化铝晶须，由于氧化铝晶须具有较高的机械强度和较高的弹性模量，将其加入钛酸镁‑钛酸钙陶瓷中具有补强增韧的作用，可将所得微波介质陶瓷材料的抗热震性能大幅提升至165℃。本发明提供的微波介质陶瓷材料成本较低，且微波介电性能优异，介电常数εr为18‑22，品质因数Qf≥60000GHz，频率温度系数Tf近零(±5ppm/℃)，具有更高的可靠性，应用前景良好。
Microwave dielectric ceramic material and preparation method thereof
微波介质陶瓷材料及其制备方法
WANG XIUHONG (author) / HUANG QINGHUAN (author) / YE RONG (author) / WANG JIN (author) / AI CHENXIA (author)
2021-04-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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