Ceramic material suitable for sintering multilayer ceramic capacitor in low temperature and preparing method thereof

Abstract

The present invention provides ceramic material suitable for sintering a multilayer ceramic capacitor in low temperature and a preparing method thereof, which relates to the technical field of functional ceramic material. The main material of the ceramic material is composition indicated by aBaO-bLn2O3-cBi2O3-dTiO3, wherein a, b, c and d satisfy: a plus b plus c plus d is equal to 1, a is larger than or equal to 0.13 and is smaller than or equal to 0.17, b is larger than or equal to 0.12 and is smaller than or equal to 0.22, c is larger than or equal to 0.02 and is smaller than or equal to 0.1, and d is larger than or equal to 0.4 and is smaller than or equal to 0.74.The assistant material of the ceramic material is a mixture composed of eBi2O3-fB2O3-gZnO-hSiO2 glass 1 and jBaO-kLi2O-lCaO-mSrO-nSi02 glass 2, wherein e, f, g and h satisfy: e plus f plus g plus h is equal to 100, e is larger than or equal to 50 and is smaller than or equal to 90, f is larger than or equal to 5 and is smaller than or equal to 30, g is larger than or equal to 4 and is smaller than or equal to 30, and h is larger than or equal to 1and is smaller than or equal to20; and j, k, l, m and n satisfy: j plus k plus l plus m plus n is equal to 100, j is larger than or equal to 20 and is smaller than or equal to 25, k is larger than or equal to 5 and is smaller than or equal to 10, l is larger than or equalto 5 and is smaller than or equal to 10, m is larger than or equal to 0 and is smaller than or equal to 10, and n is larger than or equal to 50 and is smaller than or equal to 70.The present invention not only can keep high specific inductive capacity under a lower-temperature sintering condition, but also has good NPO character.

Description

technical field [0001] The invention relates to the technical field of functional ceramic materials, in particular to a ceramic material suitable for low-temperature sintered multilayer ceramic capacitors and a preparation method thereof. Background technique [0002] Multilayer Ceramic Capacitors (Multilayer Ceramic Capacitors) referred to as MLCC, it is the electrode material and the ceramic green body alternately stacked in multiple layers and fired into a whole. In the digital flat panel TV, communication, network and other products, in the circuit design of flat panel display (FPD), power supply module, receiving / transmitting and digital audio module, etc., a large number of products need to have stable temperature coefficient, high cut-off frequency, and large wave resistance. NPO breakdown-resistant MLCC components with surge voltage and other characteristics. According to the International Electronic Industries Association EIA (Electronic Industries Association) sta...

AI Technical Summary

Problems solved by technology

For example, in the "dielectric material and its manufacturing method" disclosed in Chinese patent 200410085174, the basic composition of the ceramic material is BaO-Nd 2 o 3 -TiO 2 -Bi 2 o 3 , its material conforms to the NPO standard, but its dielectric constant is low, only 40-60

Low dielectric constant will lead to low volume ratio of MLCC, which limits the miniaturization of MLCC components

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