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Aluminate-based low-dielectric microwave dielectric ceramic and preparation method thereof
The invention discloses an aluminate-based low-dielectric microwave dielectric ceramic and a preparation method thereof. The main crystal phase of the microwave dielectric ceramic has a garnet type crystal structure, the specific chemical composition is (2+x)CaO-0.5Ln2O3-(2-y)ZrO2-(x+y)MO2-1.5Al2O3, Ln is Y, La, Lu, Gd or other lanthanide elements, M is Hf, Sn or Ti, x is more than or equal to 0 and less than or equal to 0.5, and y is more than or equal to 0 and less than or equal to 2.0. The dielectric constant of the microwave dielectric ceramic ranges from 10.81 to 13.52, the quality factor ranges from 72441 GHz to 121930 GHz, and the temperature coefficient of resonance frequency ranges from +0.50 ppm/DEG C to -35.48 ppm/DEG C. In the preparation process, the pre-sintering condition of the ceramic material is that the temperature is kept at 1300 DEG C for 5 hours, and the sintering condition is that the temperature is kept at 1500-1600 DEG C for 10 hours. The microwave dielectric ceramic prepared in the invention has the characteristics of low dielectric constant, high quality factor and adjustable resonant frequency temperature coefficient to near zero, and is suitable for preparing microwave communication devices such as dielectric substrates, dielectric resonators, dielectric antennas and the like.
本发明公开了一种铝酸盐基低介电常数微波介质陶瓷及其制备方法，其中微波介质陶瓷的主晶相具有石榴石型晶体结构，具体化学组成为(2+x)CaO‑0.5Ln2O3‑(2‑y)ZrO2‑(x+y)MO2‑1.5Al2O3，Ln为Y、La、Lu、Gd或其它镧系元素，M为Hf、Sn或Ti，0≤x≤0.5，0≤y≤2.0。微波介质陶瓷的介电常数为10.81～13.52，品质因数为72441GHz～121930GHz，谐振频率温度系数为+0.50ppm/℃～‑35.48ppm/℃。在制备过程中陶瓷材料预烧条件为1300℃保温5小时，烧结条件为1500℃～1600℃保温10小时。本发明中制备得到的微波介质陶瓷具有低介电常数、高品质因数、谐振频率温度系数可调控至近零的特点，适合用于制备介质基板、介质谐振器、介质天线等微波通讯器件。
Aluminate-based low-dielectric microwave dielectric ceramic and preparation method thereof
The invention discloses an aluminate-based low-dielectric microwave dielectric ceramic and a preparation method thereof. The main crystal phase of the microwave dielectric ceramic has a garnet type crystal structure, the specific chemical composition is (2+x)CaO-0.5Ln2O3-(2-y)ZrO2-(x+y)MO2-1.5Al2O3, Ln is Y, La, Lu, Gd or other lanthanide elements, M is Hf, Sn or Ti, x is more than or equal to 0 and less than or equal to 0.5, and y is more than or equal to 0 and less than or equal to 2.0. The dielectric constant of the microwave dielectric ceramic ranges from 10.81 to 13.52, the quality factor ranges from 72441 GHz to 121930 GHz, and the temperature coefficient of resonance frequency ranges from +0.50 ppm/DEG C to -35.48 ppm/DEG C. In the preparation process, the pre-sintering condition of the ceramic material is that the temperature is kept at 1300 DEG C for 5 hours, and the sintering condition is that the temperature is kept at 1500-1600 DEG C for 10 hours. The microwave dielectric ceramic prepared in the invention has the characteristics of low dielectric constant, high quality factor and adjustable resonant frequency temperature coefficient to near zero, and is suitable for preparing microwave communication devices such as dielectric substrates, dielectric resonators, dielectric antennas and the like.
本发明公开了一种铝酸盐基低介电常数微波介质陶瓷及其制备方法，其中微波介质陶瓷的主晶相具有石榴石型晶体结构，具体化学组成为(2+x)CaO‑0.5Ln2O3‑(2‑y)ZrO2‑(x+y)MO2‑1.5Al2O3，Ln为Y、La、Lu、Gd或其它镧系元素，M为Hf、Sn或Ti，0≤x≤0.5，0≤y≤2.0。微波介质陶瓷的介电常数为10.81～13.52，品质因数为72441GHz～121930GHz，谐振频率温度系数为+0.50ppm/℃～‑35.48ppm/℃。在制备过程中陶瓷材料预烧条件为1300℃保温5小时，烧结条件为1500℃～1600℃保温10小时。本发明中制备得到的微波介质陶瓷具有低介电常数、高品质因数、谐振频率温度系数可调控至近零的特点，适合用于制备介质基板、介质谐振器、介质天线等微波通讯器件。
Aluminate-based low-dielectric microwave dielectric ceramic and preparation method thereof
一种铝酸盐基低介微波介质陶瓷及其制备方法
SONG XIAOQIANG (author) / LEI WEN (author) / LYU WENZHONG (author) / FU MING (author) / WANG XIAOCHUAN (author) / LIANG FEI (author) / WANG XIAOHONG (author) / FAN GUIFEN (author)
2021-10-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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