A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Low-loss temperature-stable type middle-dielectric-constant microwave dielectric ceramic LiBi2NbO6
The invention discloses a composite oxide LiBi2NbO6 which can be applied as a temperature-stable type middle-dielectric-constant microwave dielectric ceramic capable of being sintered at low temperature and a preparation method of the composite oxide LiBi2NbO6. The preparation method comprises the following steps: (1) weighing and batching original powder of Li2CO3, Bi2O3 and Nb2O5 with the purity of more than 99.9% (in percentage by weight) according to the composition of LiBi2NbO6; (2) performing wet ball milling and mixing on raw materials in the step (1) for 12 hours by taking absolute ethyl alcohol as a ball milling medium, and pre-burning for 6 hours at an air atmosphere at 850 DEG C after drying; and (3) adding an adhesion agent into powder prepared in the step (2), granulating, then performing compression molding, and finally sintering for 4 hours at the air atmosphere at 900-950 DEG C, wherein the adhesion agent adopts a polyvinyl alcohol solution with the mass concentration of 5%, and the addition quantity of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic disclosed by the invention is good in sintering, ensures that the dielectric constant can reach 37.3 to 38.7 and a quality factor (Qf) value can reach 64000-79000GHz, is small in temperature coefficient of resonance frequency, and has great application values in industry.
Low-loss temperature-stable type middle-dielectric-constant microwave dielectric ceramic LiBi2NbO6
The invention discloses a composite oxide LiBi2NbO6 which can be applied as a temperature-stable type middle-dielectric-constant microwave dielectric ceramic capable of being sintered at low temperature and a preparation method of the composite oxide LiBi2NbO6. The preparation method comprises the following steps: (1) weighing and batching original powder of Li2CO3, Bi2O3 and Nb2O5 with the purity of more than 99.9% (in percentage by weight) according to the composition of LiBi2NbO6; (2) performing wet ball milling and mixing on raw materials in the step (1) for 12 hours by taking absolute ethyl alcohol as a ball milling medium, and pre-burning for 6 hours at an air atmosphere at 850 DEG C after drying; and (3) adding an adhesion agent into powder prepared in the step (2), granulating, then performing compression molding, and finally sintering for 4 hours at the air atmosphere at 900-950 DEG C, wherein the adhesion agent adopts a polyvinyl alcohol solution with the mass concentration of 5%, and the addition quantity of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic disclosed by the invention is good in sintering, ensures that the dielectric constant can reach 37.3 to 38.7 and a quality factor (Qf) value can reach 64000-79000GHz, is small in temperature coefficient of resonance frequency, and has great application values in industry.
Low-loss temperature-stable type middle-dielectric-constant microwave dielectric ceramic LiBi2NbO6
FANG LIANG (author) / WANG DAN (author) / SU HEPING (author)
2015-05-20
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2016
| European Patent Office | 2016
Temperature-stable middle-dielectric constant microwave dielectric ceramic Li2Sm2ZnTiO7
| European Patent Office | 2016
Low-loss temperature stable type low dielectric constant microwave dielectric ceramic LiZn2Nb7O20
| European Patent Office | 2015
Low-loss temperature-stable type low-dielectric constant microwave dielectric ceramic LiZnNb5O14
| European Patent Office | 2015