Method for reducing dielectric loss of titanium barium stannate system in reducing atmosphere

Abstract

The invention discloses a method for reducing dielectric loss of a titanium barium stannate system in a reducing atmosphere. The method comprises the following steps: firstly, weighing and blending materials of BaTiO3, SnO2 and BaCO3 according to a formula Ba(SnxTi1-x)O3, in the formula, x is greater than 0 and less than or equal to 0.3; carrying out ball milling, drying and screening, calcining at 1050 DEG C, and synthesizing a main crystal phase; further carrying out secondary ball milling, and pelletizing with an adhesive; further pressing a pelletizing powder material into a blank, degumming the blank, and sintering at 1350-1450 DEG C in a reducing atmosphere, thereby obtaining a low-loss titanium barium stannate medium material in the reducing atmosphere. Due to addition of a secondary ball milling process, the dielectric loss of the titanium barium stannate system is reduced to 0.5-4.0% from 1.0-5.0% of the prior art, so that the properties of a multi-layer flaky ceramic capacitor are greatly improved.

Description

technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a method for reducing the dielectric loss of barium titanium stannate. Background technique [0002] The manufacturing process of MLCC (multilayer chip ceramic capacitor) requires that the internal electrode must be co-sintered with the dielectric material to form a monolithic structure, while common MLCC ceramic materials such as BaTiO 3 The sintering temperature of the system ceramic material is relatively high. For the usual air atmosphere sintering, only those metals with high melting point, difficult to oxidize and low resistivity can be used as internal electrode materials. Generally, precious metals Pt, Pd or Pd-Ag alloy are used as materials. MLCC internal electrodes, so the cost of internal electrode materials accounts for a large proportion of the production cost of MLCC, and once caused the cost of MLCC to remain high due to the high cost of electrod...

AI Technical Summary

Problems solved by technology

[0002] The manufacturing process of MLCC (multilayer chip ceramic capacitor) requires that the internal electrode must be co-sintered with the dielectric material to form a monolithic structure, while common MLCC ceramic materials such as BaTiO 3 The sintering temperature of the system ceramic material is relatively high. For the usual air atmosphere sintering, only those metals with high melting point, difficult to oxidize and low resistivity can be used as internal electrode materials. Generally, precious metals Pt, Pd or Pd-Ag alloy are used as materials. MLCC internal electrodes, so the cost of internal electrode materials accounts for a large proportion of the production cost of MLCC, and once caused the cost of MLCC to remain high due to the high cost of electrode materials, which greatly limited its application range

In addition, the large specific volume of MLCC requires reducing the thickness of the dielectric layer and increasing the number of ceramic dielectric layers, but as the number of dielectric layers increases, the number of internal electrode layers also increases accordingly, resulting in an increase in the production cost of MLCC

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