Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-temperature-sintered high-Q lithium titanate-based microwave dielectric ceramic material and preparation method thereof
The invention belongs to the technical field of ceramic materials, and discloses a low-temperature-sintered high-Q lithium titanate-based microwave dielectric ceramic material and a preparation method thereof. The chemical formula of the material is Li<2>Ti<0.98>Mg<0.02>O<2.96>F<0.04>+1 w.t.% Nb<2>O<5>+1 w.t.% [(x)CuO-(y)B<2>O<3>], wherein a mass ratio of x to y is 1.0: 1.2 to 1.4: 1.0; the dielectric constant epsilon is 21.3 to 24.5; the Q value of a quality factor is 20,496 to 61,801 GHz; and the temperature coefficient of resonance frequency tau is 19.0 to 29.0 ppm/DEG C. A traditional solid-phase synthesis method is adopted, and the high-Q microwave dielectric material for LTCC is successfully prepared; and the low-melting-point oxides CuO and B2O3 are used for jointly adjusting the sintering characteristic of a matrix, a liquid-phase mass transfer mechanism is used for introducing the low-melting-point oxides CuO and B2O3, and a sintering mass transfer process is accelerated, so the sintering temperature of the matrix is reduced, the densification process of the material is completed at a relatively low temperature, and the dielectric constant can be improved to a certain extent.
本发明属于陶瓷材料技术领域，公开了一种低温烧结高Q钛酸锂基微波介质陶瓷材料及其制备方法，化学式为Li2Ti0.98Mg0.02O2.96F0.04+1w.t.％Nb2O5+1w.t.％[(x)CuO‑(y)B2O3]；其中，质量比x:y取值为1.0:1.2～1.4:1.0；介电常数εr为21.3～24.5，品质因数Qf值为20,496～61,801GHz，谐振频率温度系数τf为19.0～29.0ppm/℃。本发明采用传统的固相合成方法，成功制备了LTCC用高Q微波介质材料，利用低熔点氧化物CuO和B2O3共同调节基体的烧结特性，两者的引入利用了液相传质机理，加速烧结传质过程，不仅降低了基体的烧结温度，同时促使材料致密化过程在较低温度下完成，可在一定程度上提高介电常数。
Low-temperature-sintered high-Q lithium titanate-based microwave dielectric ceramic material and preparation method thereof
The invention belongs to the technical field of ceramic materials, and discloses a low-temperature-sintered high-Q lithium titanate-based microwave dielectric ceramic material and a preparation method thereof. The chemical formula of the material is Li<2>Ti<0.98>Mg<0.02>O<2.96>F<0.04>+1 w.t.% Nb<2>O<5>+1 w.t.% [(x)CuO-(y)B<2>O<3>], wherein a mass ratio of x to y is 1.0: 1.2 to 1.4: 1.0; the dielectric constant epsilon is 21.3 to 24.5; the Q value of a quality factor is 20,496 to 61,801 GHz; and the temperature coefficient of resonance frequency tau is 19.0 to 29.0 ppm/DEG C. A traditional solid-phase synthesis method is adopted, and the high-Q microwave dielectric material for LTCC is successfully prepared; and the low-melting-point oxides CuO and B2O3 are used for jointly adjusting the sintering characteristic of a matrix, a liquid-phase mass transfer mechanism is used for introducing the low-melting-point oxides CuO and B2O3, and a sintering mass transfer process is accelerated, so the sintering temperature of the matrix is reduced, the densification process of the material is completed at a relatively low temperature, and the dielectric constant can be improved to a certain extent.
本发明属于陶瓷材料技术领域，公开了一种低温烧结高Q钛酸锂基微波介质陶瓷材料及其制备方法，化学式为Li2Ti0.98Mg0.02O2.96F0.04+1w.t.％Nb2O5+1w.t.％[(x)CuO‑(y)B2O3]；其中，质量比x:y取值为1.0:1.2～1.4:1.0；介电常数εr为21.3～24.5，品质因数Qf值为20,496～61,801GHz，谐振频率温度系数τf为19.0～29.0ppm/℃。本发明采用传统的固相合成方法，成功制备了LTCC用高Q微波介质材料，利用低熔点氧化物CuO和B2O3共同调节基体的烧结特性，两者的引入利用了液相传质机理，加速烧结传质过程，不仅降低了基体的烧结温度，同时促使材料致密化过程在较低温度下完成，可在一定程度上提高介电常数。
Low-temperature-sintered high-Q lithium titanate-based microwave dielectric ceramic material and preparation method thereof
低温烧结高Q钛酸锂基微波介质陶瓷材料及其制备方法
LI LINGXIA (Autor:in) / WANG DONG (Autor:in) / DU MINGKUN (Autor:in) / YUE TAO (Autor:in) / HE XUERUI (Autor:in)
01.02.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2021
| Europäisches Patentamt | 2021
Medium-temperature sintered microwave dielectric ceramic material and preparation method thereof
| Europäisches Patentamt | 2023
Low-temperature sintered microwave dielectric ceramic material and preparation method thereof
| Europäisches Patentamt | 2024
Low-temperature sintered microwave dielectric ceramic material and preparation method thereof
| Europäisches Patentamt | 2024