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Dielectric ceramic, preparation method and prepared harmonic oscillator

A technology of dielectric ceramics and resonators, applied in the direction of resonators, waveguide devices, electrical components, etc., can solve few problems and achieve the effect of good mechanical properties and compact structure

Inactive Publication Date: 2012-09-26
KUANG CHI INNOVATIVE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional dielectric ceramics include barium titanate and some oxides, but it is rare to achieve a product with a dielectric constant greater than 70 and a loss tangent less than 0.003

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 87.5% CaTiO by mass percentage 3 , 2% Al 2 o 3 , 8% Nd 2 o 3 and 2.5% SiO 2 After wet mixing of the powder, and the particle size of each component is 0.5 microns, the above materials are sintered for 2 hours at a temperature of 1200 ° C and a pressure of 200 MPa using hot isostatic pressing technology. The electrical constant is 79, and the loss tangent angle is 0.002; the above-mentioned resonator can also be prepared by spark plasma sintering technology.

Embodiment 2

[0015] 89% CaTiO by mass percentage 3 , 2.5% Al 2 o 3 , 6% Nd 2 o 3 and 2.5% SiO 2 After wet mixing of the powder, and the particle size of each component is 0.6 microns, the above materials are sintered for 3 hours at a temperature of 1200 ° C and a pressure of 220 MPa using hot isostatic pressing technology, and the obtained harmonic oscillator is tested: The electrical constant is 79.8, and the loss tangent angle is 0.002; the above-mentioned resonator can also be prepared by spark plasma sintering technology.

Embodiment 3

[0017] 90.5% CaTiO by mass percentage 3 , 1.8% Al 2 o 3 , 6.5% Nd 2 o 3 and 1.2% SiO 2 After wet mixing of the powder, and the particle size of each component is 0.5 microns, the above materials are sintered for 4 hours at a temperature of 1300 ° C and a pressure of 250 MPa using hot isostatic pressing technology. The electrical constant is 80, and the loss tangent angle is 0.002; the above-mentioned resonator can also be prepared by spark plasma sintering technology.

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PUM

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Abstract

The invention provides a dielectric ceramic. The formula of the dielectric ceramic comprises the following components in percentage by mass: 87.5-93.5% of CaTiO3 (calcium titanate), 1-2.5% of Al2O3 (aluminium oxide), 4-8% of Nd2O3 (neodymium oxide) and 1-2.5% of SiO2 (silica). According to the harmonic oscillator prepared by using the formula of the dielectric ceramic, the dielectric constant can be up to about 80; the loss tangent angle is 0.002, and the harmonic oscillator is compact and uniform in structure and excellent in mechanical property. Therefore, the dielectric ceramic can be widely applied to microwave components such as the harmonic oscillator of a filter.

Description

【Technical field】 [0001] The invention relates to the field of ceramic materials, in particular to a dielectric ceramic, a preparation method and a prepared harmonic oscillator. 【Background technique】 [0002] Dielectric ceramics are used in components such as dielectric filters and capacitors, and usually require high dielectric constant and low dielectric loss tangent. With the new development of antenna microwave devices, there are higher requirements for the dielectric constant and loss of dielectric ceramics. Conventional dielectric ceramics include barium titanate and some oxides, but it is rare to achieve products with a dielectric constant greater than 70 and a loss tangent less than 0.003. 【Content of invention】 [0003] The technical problem to be solved by the present invention is to provide a dielectric ceramic, the resonator made of the dielectric ceramic has a high dielectric constant and low loss; [0004] The technical solution adopted by the present inve...

Claims

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Application Information

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IPC IPC(8): C04B35/465C04B35/622H01P7/10
Inventor 刘若鹏徐冠雄缪锡根安娜・玛丽亚・劳拉・博卡内格拉
Owner KUANG CHI INNOVATIVE TECH
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