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Method for preparing ultra-wide temperature stable barium titanate dielectric material by adopting annealing method

A dielectric material, barium titanate technology, applied in the field of ceramic compositions, can solve the problems of harsh use environment, X9R can not fully meet the use requirements, etc., achieve excellent dielectric properties, improve the effect of stability

Inactive Publication Date: 2014-07-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in aerospace, geological exploration, automotive electronics and other fields, the use environment of MLCC is more harsh, and X9R cannot fully meet the use requirements. Therefore, the dielectric temperature stability of barium titanate-based dielectric materials is improved and the working temperature range is obtained as large as possible. It is still one of the current research hotspots, and the current research focus of dielectric capacitor manufacturers is the research around formula and preparation process

Method used

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  • Method for preparing ultra-wide temperature stable barium titanate dielectric material by adopting annealing method
  • Method for preparing ultra-wide temperature stable barium titanate dielectric material by adopting annealing method
  • Method for preparing ultra-wide temperature stable barium titanate dielectric material by adopting annealing method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] 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 mass ratio: Na 0.5 Bi 0.5 TiO 3 : BaTiO 3 : Nb 2 o 5 =1:6.2:0.17 Ingredients, 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 1000°C to obtain frit; In the obtained frit, add 5% glass powder by mass percentage (the composition of glass powder and its mass percentage content are: 20% Bi 2 o 3 , 30%Pb 3 o 4 , 30%TiO 2 , 20%H 3 BO 3 ), and 1.5% by mass of magnesium oxide and 0.3% by mass of cerium oxide were mixed in deionized water for ball milling, using a QM-3SP4 planetary ball mill (ball mill speed 400...

Embodiment 2

[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 mass ratio: Na 0.5 Bi 0.5 TiO 3 : BaTiO 3 : Nb 2 o 5 =1:6.2:0.17 ingredients, 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 1000°C to obtain frit; In the gained frit, adding mass percentage is 5% glass powder (glass powder composition and mass percentage content thereof are: 20% Bi 2 o 3 , 30%Pb 3 o 4 , 30%TiO 2 , 20%H 3 BO 3 ), and 1.5% by mass percentage of magnesium oxide and 0.3% by mass percentage of cerium oxide, mixed in deionized water and ball milled, using a QM-3SP4 planetary ball mill (ball...

Embodiment 3

[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 , Nb2 o 5 According to mass ratio: Na 0.5 Bi 0.5 TiO 3 : BaTiO 3 : Nb 2 o 5 =1:6.2:0.17 Ingredients, 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 1000°C to obtain frit; In the obtained frit, add 5% glass powder by mass percentage (the composition of glass powder and its mass percentage content are: 20% Bi 2 o 3 , 30%Pb 3 o 4 , 30%TiO 2 , 20%H 3 BO 3 ), and 1.5% by mass of magnesium oxide and 0.3% by mass of cerium oxide were mixed in deionized water for ball milling, using a QM-3SP4 planetary ball mill (ball mill speed 400 r...

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Abstract

The invention discloses a method for preparing an ultra-wide temperature stable barium titanate dielectric material by adopting an annealing method. The method comprises the following step: annealing a barium titanate dielectric material obtained by the traditional solid-phase process method at 1,000-1100 DEG C for 1-8 hours to finally obtain the ultra-wide temperature stable barium titanate dielectric material with excellent performance. The stability of the dielectric constant of the barium titanate dielectric material and the dielectric constant of a high-temperature section (150-310 DEG C) is significantly improved; the method has excellent dielectric properties, wherein epsilon r is greater than or equal to 1600, the insulation resistivity is greater than 10<11>ohm.cm, the rate of change of capacitance within a range of -55 DEG C to 310 DEG C, namely delta C / C at 20 DEG C is smaller than or equal to + / -15%, and tan delta is smaller than or equal to 2%.

Description

technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a method for preparing an ultra-wide temperature stable barium titanate-based dielectric material by an annealing 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 used in MLCC has been to improve their comprehensive performance and expand their operating temperature range under the premise of ensuring their high reli...

Claims

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Application Information

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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