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Manganese carbonate doped high temperature stable barium titanate based dielectric material

A high-temperature stable, type barium titanate technology, applied in the field of ceramic compositions, can solve problems such as harsh use environment, and achieve the effects of no pollution in the process and uniform components

Inactive Publication Date: 2015-12-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in aerospace, geological exploration, automotive electronics and other fields, the use environment of MLCC is more harsh

Method used

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  • Manganese carbonate doped high temperature stable barium titanate based dielectric material
  • Manganese carbonate doped high temperature stable barium titanate based dielectric material
  • Manganese carbonate doped high temperature stable barium titanate based dielectric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Na first 2 CO 3 、 Bi 2 o 3 、TiO 2 According to the mass molar percentage of 1:1:4, mixed with deionized water and ball milled, using QM-3SP4 planetary ball mill (ball mill speed 400 rpm) ball milled for 4 hours, dried and pre-fired at 800 ° C to obtain Na 0.5 Bi 0.5 TiO 3 solid particles; the Na 0.5 Bi 0.5 TiO 3 , BaTiO 3 , Nb 2 o 5 According to the mass ratio of 1:6.2:0.17, mix with deionized water for ball milling, use QM-3SP4 planetary ball mill (ball mill speed 400 rpm) for ball milling for 4 hours, dry and pre-fire at 1000°C; Add 5% glass powder by mass percentage (glass powder composition and mass percentage content are: 20% Bi 2 o 3 , 30%Pb 3 o 4 , 30%TiO 2 , 20%H 3 BO 3 ), manganese carbonate with a mass percentage of 4%, mixed with deionized water and ball milled, using a QM-3SP4 planetary ball mill (ball mill speed 400 rpm) for 2 hours, and dried. Add 5% paraffin wax to the obtained drying powder to granulate, and then pass through 1000 hole...

Embodiment 2

[0022] Na first 2 CO 3 、 Bi 2 o 3 、TiO 2 According to the mass molar percentage of 1:1:4, mixed with deionized water and ball milled, using QM-3SP4 planetary ball mill (ball mill speed 400 rpm) ball milled for 4 hours, dried and pre-fired at 800 ° C to obtain Na 0.5 Bi 0.5 TiO 3 solid particles; the Na 0.5 Bi 0.5 TiO 3 , BaTiO 3 , Nb 2 o 5 According to the mass ratio of 1:6.2:0.17, mix with deionized water for ball milling, use QM-3SP4 planetary ball mill (ball mill speed 400 rpm) for ball milling for 4 hours, dry and pre-fire at 1000°C; Add 5% glass powder by mass percentage (glass powder composition and mass percentage content are: 20% Bi 2 o 3 , 30%Pb 3 o 4 , 30%TiO 2 , 20%H 3 BO 3 ), manganese carbonate with a mass percentage of 4.3%, mixed with deionized water for ball milling, using a QM-3SP4 planetary ball mill (ball mill speed 400 rpm) for ball milling for 2 hours, and drying. Add 5% paraffin wax to the obtained drying powder to granulate, and then p...

Embodiment 3

[0024] Na first 2 CO 3 、 Bi 2 o 3 、TiO 2 According to the mass molar percentage of 1:1:4, mixed with deionized water and ball milled, using QM-3SP4 planetary ball mill (ball mill speed 400 rpm) ball milled for 4 hours, dried and pre-fired at 800 ° C to obtain Na 0.5 Bi 0.5 TiO 3 solid particles; the Na 0.5 Bi 0.5 TiO 3 , BaTiO 3 , Nb 2 o 5 According to the mass ratio of 1:6.2:0.17, mix with deionized water for ball milling, use QM-3SP4 planetary ball mill (ball mill speed 400 rpm) for ball milling for 4 hours, dry and pre-fire at 1000°C; Add 5% glass powder by mass percentage (glass powder composition and mass percentage content are: 20% Bi 2 o 3 , 30%Pb 3 o 4 , 30%TiO 2 , 20%H 3 BO3 ), manganese carbonate with a mass percentage of 4.5%, mixed with deionized water and ball milled, using a QM-3SP4 planetary ball mill (ball mill speed 400 rpm) for ball milling for 2 hours, and dried. Add 5% paraffin wax to the obtained drying powder to granulate, and then pass ...

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Abstract

The invention discloses a preparation method of a manganese carbonate-doped high-temperature stable barium titanate-based dielectric material. The preparation method comprises the following steps: mixing Na2CO3, Bi2O3 and TiO2 according to a molar ratio of 1 : 1 : 4, and calcining to prepare Na0.5Bi0.5TiO3 solid particles; mixing Na0.5Bi0.5TiO3, BaTiO3 and Nb2O5 according to a mass ratio of 1 : 6.2 : 0.17, and presintering at 1000 DEG C to prepare molten blocks; adding 5wt% of glass powder and 4wt%-4.5wt% of manganese carbonate, performing ball-milling, and drying; granulating, forming, dewaxing, and sintering at 1130-1160 DEG C to prepare the manganese carbonate-doped high-temperature stable barium titanate-based dielectric material. According to the method, obtained powder components are uniform and a process is pollution-free; the dielectric constant epsilon r is not less than 900 and the capacitance change rate delta C / C100 DEG C within 100-310 DEG C is not more than + / -15%.

Description

technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a MnCO 3 Doped high temperature stable BaTiO 3 Base dielectric material and its preparation method. Background technique [0002] With the rapid development of various mobile electronic devices such as notebook computers, mobile phones, digital cameras, and automotive electronics, chip electronic components have gradually replaced traditional lead electronic components. Chip multilayer ceramic capacitor (MLCC) is currently the chip component with the largest production and sales volume. It stacks electrode materials and ceramic green bodies in parallel in multiple layers and burns them into a whole at the same time. [0003] In recent years, the development trend of dielectric materials for MLCC has been to improve their overall performance, and to expand their operating temperature range on the premise of ensuring their high reliability. -55~125℃), X8R (wor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622
Inventor 李玲霞陈俊晓张宁柳亚然高正东于经洋
Owner TIANJIN UNIV