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Microwave dielectric ceramic material and preparation method thereof
The invention provides a microwave dielectric ceramic material and a preparation method thereof. The microwave dielectric ceramic material comprises a principal crystalline phase and a modified additive, wherein the modified additive comprises a negative temperature drift modified additive; the microwave dielectric ceramic material is mainly prepared from the following raw materials in percentage by mole: 14.0%-20.0% of CaCO3, 61.0%-66.0% of Sm2O3, 12.0%-14.0% of TiO2 and 6.5%-8.5% of a negative temperature drift modification additive, wherein CaCO3, Sm2O3 and TiO2 are calcined to form a main crystal phase, the structural formula of the main crystal phase is (1-x) CaTiO3-xSm2TiaOb, x is more than 0 and less than or equal to 0.2, a is more than or equal to 1 and less than or equal to 3, and b is more than or equal to 5 and less than or equal to 9. According to the invention, a CaTiO3-SmTiO3 two-phase composite system is used as a main crystal phase, the epsilon r value is high and controllable, the Qf value is higher, and the total temperature drift is very low and is close to zero; meanwhile, the microwave dielectric ceramic material with excellent microwave dielectric properties and stable functions can be obtained by adjusting the x value and the addition amount of the negative temperature drift modification additive.
本发明提供了一种微波介质陶瓷材料及其制备方法。本发明微波介质陶瓷材料包括主晶相和改性添加剂，改性添加剂包括负温漂改性添加剂；该微波介质陶瓷材料主要由以下摩尔百分比的原料制备而成：CaCO3 14.0～20.0％，Sm2O361.0～66.0％，TiO2 12.0～14.0％，负温漂改性添加剂6.5～8.5％；其中CaCO3、Sm2O3和TiO2煅烧形成主晶相，主晶相结构式为(1‑x)CaTiO3‑xSm2TiaOb，0＜x≤0.2，1≤a≤3，5≤b≤9。本发明以CaTiO3‑SmTiO3两相复合体系作为主晶相，不仅εr值高、可控，而且Qf值更高，全温漂非常低，接近于零；同时，通过调节x值及负温漂改性添加剂的添加量，可获得具有优异微波介电性能且稳定功能的微波介质陶瓷材。
Microwave dielectric ceramic material and preparation method thereof
The invention provides a microwave dielectric ceramic material and a preparation method thereof. The microwave dielectric ceramic material comprises a principal crystalline phase and a modified additive, wherein the modified additive comprises a negative temperature drift modified additive; the microwave dielectric ceramic material is mainly prepared from the following raw materials in percentage by mole: 14.0%-20.0% of CaCO3, 61.0%-66.0% of Sm2O3, 12.0%-14.0% of TiO2 and 6.5%-8.5% of a negative temperature drift modification additive, wherein CaCO3, Sm2O3 and TiO2 are calcined to form a main crystal phase, the structural formula of the main crystal phase is (1-x) CaTiO3-xSm2TiaOb, x is more than 0 and less than or equal to 0.2, a is more than or equal to 1 and less than or equal to 3, and b is more than or equal to 5 and less than or equal to 9. According to the invention, a CaTiO3-SmTiO3 two-phase composite system is used as a main crystal phase, the epsilon r value is high and controllable, the Qf value is higher, and the total temperature drift is very low and is close to zero; meanwhile, the microwave dielectric ceramic material with excellent microwave dielectric properties and stable functions can be obtained by adjusting the x value and the addition amount of the negative temperature drift modification additive.
本发明提供了一种微波介质陶瓷材料及其制备方法。本发明微波介质陶瓷材料包括主晶相和改性添加剂，改性添加剂包括负温漂改性添加剂；该微波介质陶瓷材料主要由以下摩尔百分比的原料制备而成：CaCO3 14.0～20.0％，Sm2O361.0～66.0％，TiO2 12.0～14.0％，负温漂改性添加剂6.5～8.5％；其中CaCO3、Sm2O3和TiO2煅烧形成主晶相，主晶相结构式为(1‑x)CaTiO3‑xSm2TiaOb，0＜x≤0.2，1≤a≤3，5≤b≤9。本发明以CaTiO3‑SmTiO3两相复合体系作为主晶相，不仅εr值高、可控，而且Qf值更高，全温漂非常低，接近于零；同时，通过调节x值及负温漂改性添加剂的添加量，可获得具有优异微波介电性能且稳定功能的微波介质陶瓷材。
Microwave dielectric ceramic material and preparation method thereof
一种微波介质陶瓷材料及其制备方法
MA ZHOUYI (author) / SONG YONGSHENG (author) / WANG XIAOGUO (author) / CHEN FANHUAN (author)
2021-07-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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