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Dielectric material for high temperature stable type ceramic capacitor, and preparation method therefor and application thereof
The invention discloses a dielectric material for a high temperature stable type ceramic capacitor, and a preparation method therefor and application thereof. The dielectric material for the high temperature stable type ceramic capacitor comprises the following components in percentage by weight: 30%-60% of BaTiO3; 5%-35% of NaTiO3; 2%-25% of PbTiO3; 1%-20% of CaZrO3; 1%-30% of Bi2O3 nTiO2; 1%-30% of MgO; and 0.01%-1% of MnCO3; wherein n equals 1-7. The preparation method comprises the following steps of respectively synthesizing various powders of BaTiO3, NaTiO3, PbTiO3, CaZrO3 and Bi2O3 nTiO2; preparing the various powders of BaTiO3, NaTiO3, PbTiO3, CaZrO3 and Bi2O3 nTiO2 synthesized in the previous step into base stock; and adding MgO and MnCO3 in the base stock synthesized in the previous step, synthesizing, and carrying out technological processes including wet ball-milling, discharging, slurry sedimentation, slurry preparation, centrifugal granulation and deironing to obtain the dielectric material of the ceramic capacitor. The temperature change rate delta epsilon/epsilon 25 of the material is smaller than or equal to |+/-5%| (-25 DEG C-85 DEG C); a dielectric constant epsilon 25 is greater than or equal to 1200; a loss tangent value tg delta is smaller than or equal to 1%; and a breakdown voltage VBDC is greater than or equal to10KV/mm. The dielectric material for a high temperature stable type ceramic capacitor can be used for manufacturing high voltage capacitors with strict requirements on temperature stability and relevant components.
Dielectric material for high temperature stable type ceramic capacitor, and preparation method therefor and application thereof
The invention discloses a dielectric material for a high temperature stable type ceramic capacitor, and a preparation method therefor and application thereof. The dielectric material for the high temperature stable type ceramic capacitor comprises the following components in percentage by weight: 30%-60% of BaTiO3; 5%-35% of NaTiO3; 2%-25% of PbTiO3; 1%-20% of CaZrO3; 1%-30% of Bi2O3 nTiO2; 1%-30% of MgO; and 0.01%-1% of MnCO3; wherein n equals 1-7. The preparation method comprises the following steps of respectively synthesizing various powders of BaTiO3, NaTiO3, PbTiO3, CaZrO3 and Bi2O3 nTiO2; preparing the various powders of BaTiO3, NaTiO3, PbTiO3, CaZrO3 and Bi2O3 nTiO2 synthesized in the previous step into base stock; and adding MgO and MnCO3 in the base stock synthesized in the previous step, synthesizing, and carrying out technological processes including wet ball-milling, discharging, slurry sedimentation, slurry preparation, centrifugal granulation and deironing to obtain the dielectric material of the ceramic capacitor. The temperature change rate delta epsilon/epsilon 25 of the material is smaller than or equal to |+/-5%| (-25 DEG C-85 DEG C); a dielectric constant epsilon 25 is greater than or equal to 1200; a loss tangent value tg delta is smaller than or equal to 1%; and a breakdown voltage VBDC is greater than or equal to10KV/mm. The dielectric material for a high temperature stable type ceramic capacitor can be used for manufacturing high voltage capacitors with strict requirements on temperature stability and relevant components.
Dielectric material for high temperature stable type ceramic capacitor, and preparation method therefor and application thereof
SUN ANHONG (author) / CHANG BAOJU (author)
2016-02-03
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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