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Low-loss temperature-stable olivine type microwave dielectric ceramic and preparation method thereof
The invention provides low-loss temperature-stable olivine type microwave dielectric ceramic and a preparation method thereof, the chemical formula is (1-y) Mg (2-x) GaxSi (1-x) AlxO (4-y) CaTiO3, x is more than 0 and less than or equal to 0.02, and y is more than or equal to 9% and less than or equal to 13%. The preparation method comprises the following steps: firstly, preparing Mg (2-x) GaxSi (1-x) AlxO4, respectively replacing parts of Mg < 2 + > and Si < 4 + > in forsterite with Ga < 3 + > and Al < 3 + >, increasing the quality factor from 203700GHz to 236600GHz, controlling the dielectric constant between 6.55 and 7.05, and controlling the temperature coefficient of resonance frequency between-54 ppm/DEG C and-38 ppm/DEG C; and then adding CaTiO3 according to a mass ratio, fully mixing and sintering to obtain the temperature-stable microwave dielectric composite ceramic. According to the invention, the sintering temperature is reduced, the ceramic material has low dielectric loss and good temperature stability, the preparation process is simple, and the ceramic material has strong practicability in millimeter wave communication such as 5G/6G and the like as a dielectric ceramic material.
本发明提供一种低损耗温度稳定橄榄石型微波介质陶瓷及其制备方法，化学式为(1‑y)Mg2‑xGaxSi1‑xAlxO4‑yCaTiO3，其中0＜x≤0.02，9％≤y≤13％。首先制备Mg2‑xGaxSi1‑xAlxO4，通过Ga3+和Al3+分别取代镁橄榄石中的部分Mg2+和Si4+位置，品质因数从203700GHz提升到236600GHz，介电常数在6.55～7.05之间，谐振频率温度系数为‑54～‑38ppm/℃；然后按照质量比加入CaTiO3，充分混合后进行烧结得到温度稳定型的微波介质复合陶瓷。本发明在降低烧结温度的同时，使陶瓷材料具有较低的介电损耗以及良好的温度稳定性，制备工艺简单，在5G/6G等毫米波通讯上作为介质陶瓷材料具有很强的实用性。
Low-loss temperature-stable olivine type microwave dielectric ceramic and preparation method thereof
The invention provides low-loss temperature-stable olivine type microwave dielectric ceramic and a preparation method thereof, the chemical formula is (1-y) Mg (2-x) GaxSi (1-x) AlxO (4-y) CaTiO3, x is more than 0 and less than or equal to 0.02, and y is more than or equal to 9% and less than or equal to 13%. The preparation method comprises the following steps: firstly, preparing Mg (2-x) GaxSi (1-x) AlxO4, respectively replacing parts of Mg < 2 + > and Si < 4 + > in forsterite with Ga < 3 + > and Al < 3 + >, increasing the quality factor from 203700GHz to 236600GHz, controlling the dielectric constant between 6.55 and 7.05, and controlling the temperature coefficient of resonance frequency between-54 ppm/DEG C and-38 ppm/DEG C; and then adding CaTiO3 according to a mass ratio, fully mixing and sintering to obtain the temperature-stable microwave dielectric composite ceramic. According to the invention, the sintering temperature is reduced, the ceramic material has low dielectric loss and good temperature stability, the preparation process is simple, and the ceramic material has strong practicability in millimeter wave communication such as 5G/6G and the like as a dielectric ceramic material.
本发明提供一种低损耗温度稳定橄榄石型微波介质陶瓷及其制备方法，化学式为(1‑y)Mg2‑xGaxSi1‑xAlxO4‑yCaTiO3，其中0＜x≤0.02，9％≤y≤13％。首先制备Mg2‑xGaxSi1‑xAlxO4，通过Ga3+和Al3+分别取代镁橄榄石中的部分Mg2+和Si4+位置，品质因数从203700GHz提升到236600GHz，介电常数在6.55～7.05之间，谐振频率温度系数为‑54～‑38ppm/℃；然后按照质量比加入CaTiO3，充分混合后进行烧结得到温度稳定型的微波介质复合陶瓷。本发明在降低烧结温度的同时，使陶瓷材料具有较低的介电损耗以及良好的温度稳定性，制备工艺简单，在5G/6G等毫米波通讯上作为介质陶瓷材料具有很强的实用性。
Low-loss temperature-stable olivine type microwave dielectric ceramic and preparation method thereof
低损耗温度稳定橄榄石型微波介质陶瓷及其制备方法
MAO MINMIN (author) / LIU YU (author) / SONG KAIXIN (author) / LIU BING (author)
2023-08-15
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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