High-temperature stabilization ceramic capacitor dielectric

A ceramic capacitor, high-temperature technology, applied in the field of inorganic non-metallic materials, can solve the problems of not conforming to X7R characteristics, complex preparation process, increased manufacturing cost, etc., and achieve the effects of miniaturization, large capacity, cost reduction, and low dielectric loss.

Inactive Publication Date: 2013-05-22
广州市昱桥电子科技有限公司
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Problems solved by technology

The disadvantage of this patent is that the preparation process is complicated, which leads to an increase in product manufacturing costs. The dielectric constant of the high-voltage capacitor ceramics manufactured according to its dielectric formula is 1800-7200, which is too small and not as high as the dielectric constant of this pat

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Embodiment Construction

[0026] The present invention will be further described in conjunction with embodiment now. Table 1 provides the formulas of a total of 9 samples of the embodiments of the present invention.

[0027] The main raw material of the formula of the embodiment of the present invention altogether 9 samples adopts ceramic capacitor grade pure, at first adopts conventional chemical raw material to synthesize BaTiO respectively with solid phase method during preparation. 3 , SrTiO 3 , CaTiO 3 , MgNb 2 o 5 、 Bi 3 NbTiO 3 , and then mix the ingredients according to the above formula, mix the prepared materials with distilled water or deionized water using a planetary ball mill, material: ball: water = 1:3: (0.6~1.0) (mass ratio), after ball milling for 4~8 hours , dried to obtain a dry powder, adding 8-10% of its weight to the dry powder with a concentration of 10% polyvinyl alcohol solution for granulation, after mixing and grinding, passing through a 40-mesh sieve, and then p...

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Abstract

The invention relates to a high-temperature stabilization ceramic capacitor dielectric composition. A conventional ceramic capacitor dielectric preparation method is adopted, and general chemical raw materials of capacitor ceramics are utilized to prepare the high-temperature stabilization ceramic capacitor dielectric without lead, cadmium and toxicity. The ceramic capacitor dielectric composition is characterized by comprising the following components in weight percent: 55-90% of BaTiO3, 2-25% of SrTiO3, 2-15% of CaTiO3, 0.5-9% of MgNb2O5, 0.1-2.5% of Bi3NbTiO3, 0.1-0.8% of Gd2O3 and 0.03-1.0% of MnCO3, wherein the BaTiO3, the SrTiO3, the CaTiO3, the MgNb2O5 and the Bi3NbTiO3 are respectively synthesized from conventional chemical raw materials through a solid phase method. The dielectric is suitable for preparing a monolithic ceramic capacitor, the volume and voltage resistance of the ceramic capacitor can be reduced, the cost of the ceramic capacitor is greatly lowered, the safety is improved, and moreover, high temperature stability is obtained; and in addition, the dielectric does not pollute the environment in preparation and use processes.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a high-temperature stable ceramic capacitor medium; it adopts a conventional preparation method for ceramic capacitor medium and utilizes common chemical raw materials of capacitor ceramics to prepare lead-free and cadmium-free high-temperature stable ceramics Capacitor medium can also reduce the sintering temperature of capacitor ceramics. This medium is suitable for the preparation of monolithic ceramic capacitors, which can greatly reduce the cost of ceramic capacitors. At the same time, it can improve temperature stability to expand the application range of ceramic capacitors. Does not pollute the environment. Background technique [0002] Color TV, computer, communication, aerospace, missile, navigation and other fields urgently need ceramic capacitors with high breakdown voltage, good temperature stability, high reliability, miniaturization and larg...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622
Inventor 高春华黄新友
Owner 广州市昱桥电子科技有限公司
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