Low temperature sintering high voltage ceramic capacitor dielectric

A capacitor dielectric and high-voltage ceramic technology is applied in the field of low-temperature sintering high-voltage ceramic capacitor dielectrics, which can solve the problems of complex preparation process and increased manufacturing cost, and achieve the effects of cost reduction, low dielectric loss and high safety.

Inactive Publication Date: 2013-10-16
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] There is another patent "Manufacturing Method of High Voltage Ceramic Capacitor Dielectric" (Patent No. 91101958.8), which uses an unconventional process to prepare the dielectric, that is, tape casting film, and then laminates the dielectric body. The disadvantage of this patent is that the preparation process is complicated, which leads to an increase in product manufacturing costs. The sintering temperature of the patented medium is 1080-1330 ° C, which is higher than that of this patent.

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Embodiment Construction

[0027] 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.

[0028] 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 , BaZrO 3 , ZnB 2 o 4 Glass powder and BaCu(B 2 o 5 ), then mix the ingredients according to the above formula, mix the prepared materials with distilled water or deionized water by planetary ball mill ball mill, material: ball: water = 1:3: (0.6~1.0) (mass ratio), ball mill for 4~8 hours Finally, dry the dry powder, add 8-10% of its weight to the dry powder with a concentration of 10% polyvinyl alcohol solution, granulate, pass through a 40-mesh sieve after mixing, and then grind it under a press...

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Abstract

The present invention relates to technical field of inorganic non-metal materials, particularly to a low temperature sintering high voltage ceramic capacitor dielectric, wherein the formula of the dielectric comprises, by weight, 60-91% of BaTiO3, 1-13% of SrTiO3, 2-15% of BaZrO3, 0.05-2% of Nb2O5, 0.1-1.5% of ZnO, 0.03-2.0% of Co2O3, 0.5-6% of ZnB2O4 glass powder, and 0.5-4% of BaCu(B2O5). According to the present invention, the conventional ceramic capacitor dielectric preparation method is adopted, and ordinary capacitor ceramic chemical raw materials are utilized to prepare the lead-free and cadmium-free high dielectric high voltage ceramic capacitor dielectric so as to substantially reduce a sintering temperature of the ceramic capacitor; and the dielectric is suitable for preparation of monolithic ceramic capacitors and multi-layer ceramic capacitors, wherein a ceramic capacitor cost can be substantially reduced, a withstand voltage can be increased, an application range of the ceramic capacitor can be broadened, and no environment pollution is generated during preparation and use processes.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a low-temperature sintered (sintering temperature of 880-900°C) high-voltage ceramic capacitor dielectric, which adopts a conventional preparation method for ceramic capacitor dielectrics and uses common chemical raw materials for capacitor ceramics to prepare non-metallic capacitors. Lead and cadmium-free high-voltage ceramic capacitor dielectric can also greatly reduce the sintering temperature of capacitor ceramics. This medium is suitable for the preparation of monolithic ceramic capacitors and multilayer ceramic capacitors, which can greatly reduce the cost of ceramic capacitors. At the same time, it can improve Withstand voltage to expand the application range of ceramic capacitors, and do not pollute the environment during preparation and use. Background technique [0002] Color TVs, computers, communications, aerospace, missiles, navigation and ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468
Inventor 黄新友高春华李军
Owner JIANGSU UNIV
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