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A kind of linear high-voltage low-loss capacitor ceramic material and its preparation method

A capacitor ceramic, low-loss technology, applied in the direction of fixed capacitor dielectric, fixed capacitor components, etc., can solve the problems of high production cost, matching, and no practical application significance, achieving high safety, low process requirements, The effect of great practical value

Active Publication Date: 2017-02-22
FUJIAN TORCH ELECTRON TECH CO LTD
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Problems solved by technology

The sintering temperature of this patent is 1330°C-1350°C. If the sintering temperature is too high, it cannot be matched with the inner electrode Pd30 / Ag70 when making MLCC, and the production cost is high; the dielectric constant of the ceramic capacitor made by this patent can reach 2500-3700, but The range of temperature change rate mentioned is only -30°C ~ +85°C, which cannot meet the requirements of higher operating temperature electronic equipment, and has no practical application significance

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  • A kind of linear high-voltage low-loss capacitor ceramic material and its preparation method
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  • A kind of linear high-voltage low-loss capacitor ceramic material and its preparation method

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Embodiment Construction

[0024] The present invention will be further described below through specific embodiments.

[0025] A linear high-voltage low-loss capacitor ceramic material of the present invention is prepared from the following raw material components in parts by weight:

[0026] 100 parts BaTiO 3 , 5-18 parts of ZnNb 2 o 6 , 1.5-6 parts of Re 2 o 3 , 0.05-0.25 parts of MnCO 3 and 0.5-3 parts of BaB 2 o 4 ;

[0027] where Re 2 o 3 It is one or a combination of rare earth oxides.

[0028] A preparation method of a linear high-voltage low-loss capacitor ceramic material, comprising the following steps:

[0029] ① Weigh 23.44g ZnO and 76.56g Nb respectively 2 o 5 Ball milling, drying, crushing, passing through a 40-mesh standard sieve, and then calcining at 900°C for 2 hours to synthesize ZnNb2 o 6 compound;

[0030] ②Weigh 69.31gBa(OH) respectively 2 ·8H 2 O and 30.69g H 3 BO 3 Ball milling, drying, crushing, passing through a 40-mesh standard sieve, and then calcining at 6...

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Abstract

A linear high-voltage low-loss capacitor ceramic material prepared from the following raw material components in parts by weight: 100 parts of BaTiO3, 5-18 parts of ZnNb2O6, 1.5-6 parts of Re2O3, 0.05-0.25 parts of MnCO3 and 0.5- 3 parts of BaB2O4, wherein Re2O3 is one or a combination of rare earth oxides. It is prepared by ball milling, drying, crushing, and granulation, and pressing the granulated powder into a disc green body, and then sintering at medium temperature for 1-4 hours. The capacitor ceramic material of the present invention is lead-free, has a linear capacitance temperature change rate, high compressive strength, and low dielectric loss, and the capacitor performance conforms to the American EIA standard and X7P performance, and can be used to manufacture AC capacitors, temperature compensation capacitors, pulse power capacitors, etc. The monolithic capacitor with excellent performance is environmentally friendly and has great practical value, technological value and market value.

Description

technical field [0001] The invention relates to the technical field of functional ceramic materials, in particular to a linear high-voltage low-loss capacitor ceramic material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development and increasing popularity of modern technologies such as color TVs, network systems, mobile communications, global satellite positioning systems, aerospace, navigation, and military radars, there is a great demand for high-performance dielectric ceramic components. , It also puts forward higher requirements for dielectric ceramic components in terms of high breakdown strength, high temperature stability, high capacity, high reliability, miniaturization, and chip type. High-voltage resistant and low-loss capacitor ceramic materials with a linear capacitance-temperature change rate can be used in Class I and Class II MLCC applications, especially for capacitors that are potentially used in key and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622H01G4/12
Inventor 吴金剑黄祥贤林志盛张子山陈永虹谢显斌
Owner FUJIAN TORCH ELECTRON TECH CO LTD
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