Reduction-resistant Y5P ceramic capacitor dielectric porcelain

Abstract

The invention relates to a reduction-resistant ceramic dielectric material and a preparation method thereof. Ba1-xZnxTi1-yZryO3 (wherein x is more than or equal to 0.001 and less than or equal to 0.10 and y is more than or equal to 0.005 and less than or equal to 0.10) which is synthesized by a solid state reaction is taken as a main crystal phase material which accounts for 88 to 98 mass percent of the dielectric material; and three or more than three of CaO, MgO, Y2O3, Nb2O5, MnO2, SiO2, Al2O3 and R2O3 (R refers to at least one of Eu, Ho, Dy and Yb), which serve as modifiers, are added into the main crystal phase material, wherein the modifiers accounts for 2 to 12 mass percent of the dielectric material. Therefore, the ceramic dielectric material with Y5P temperature characteristic and capable of being sintered in reducing atmosphere is obtained.

Description

technical field [0001] The invention relates to an anti-reduction ceramic dielectric material and a preparation method thereof, in particular to a ceramic dielectric material with Y5P temperature characteristics and a preparation method thereof, and further to a method for manufacturing a ceramic dielectric capacitor. Background technique [0002] With the rapid development of the electronic information industry, the application fields of ceramic dielectric capacitors are becoming wider and wider. A class of ceramic dielectric materials based on barium titanate with Y5P temperature characteristics has a large market demand due to its high dielectric constant, low dielectric loss, high temperature stability and other advantages; at the same time, traditional ceramic dielectric materials of this type Since the material is not resistant to reduction, it can only be sintered in an air atmosphere. When making a monolithic ceramic capacitor, the lead-out electrode must be made of ...

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Problems solved by technology

In the face of increasingly fierce market competition, manufacturers are seeking various ways to reduce production costs in order to develop better; in this case, using relatively cheap metal copper or copper alloy as electrodes is being used more and more More importantly, this substitution can greatly reduce the material cost of ceramic capacitors; but on the other hand, when coating with copper or copper alloy slurry as an electrode, it must be in a reducing atmosphere The electrode is fired; when the electrode is fired in a reducing atmosphere, the traditional ceramic dielectric material matching the precious metal will be reduced, resulting in a decrease in the insulation resistance of the capacitor and an increase in the loss tangent value. Therefore, copper or When copper alloy is used as an electrode, the ceramic dielectric material used must be resistant to reduction, so as to ensure that the corresponding capacitor products still have excellent dielectric properties after high temperature treatment in a reducing atmosphere.

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