High-conductivity glass powder and preparation method thereof, and barium titanate-based glass ceramic based high-conductivity glass powder, and preparation method thereof

A technology of glass ceramics and glass powder, which is applied in the field of dielectric energy storage ceramics, can solve the problem that the temperature stability of dielectric materials needs to be further improved, and achieve the effects of low production cost and low melting temperature.

Active Publication Date: 2019-02-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Second, the temperature stability of the dielectric material needs to be further improved
But currently in BaTiO 3 - Adding high-conductivity glass to Bi-based relaxor ferroelectric ceramics to obtain excellent energy storage performance and temperature stability has not been reported

Method used

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  • High-conductivity glass powder and preparation method thereof, and barium titanate-based glass ceramic based high-conductivity glass powder, and preparation method thereof
  • High-conductivity glass powder and preparation method thereof, and barium titanate-based glass ceramic based high-conductivity glass powder, and preparation method thereof
  • High-conductivity glass powder and preparation method thereof, and barium titanate-based glass ceramic based high-conductivity glass powder, and preparation method thereof

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preparation example Construction

[0031] The preparation method of the barium titanate-based glass ceramics comprises the following steps:

[0032] (1) Preparation of low-melting-point high-conductivity glass powder: analytically pure B 2 o 3 , Na 2 B 4 o 7 and Na 2 SiO 3 Powder according to mass parts (B 2 o 3 40-60 parts of powder, Na 2 B 4 o 7 40-60 parts of powder, Na 2 SiO 3 5 parts to 20 parts of the powder) are weighed, mixed after weighing, and the mixed powder A is obtained; the mixed powder A is ball milled in a ball mill for 12h to 24h and mixed evenly, and the mixed powder A is dried at 60°C to 100°C Then put it into a corundum crucible, burn it into a molten state at 900°C~1000°C, keep it warm for 2h~3h, and the heating rate is 2°C / min~5°C / min; take it out and quench it at high temperature to make glass, and put the obtained glass fragments at 60 Dry at ℃~100℃, grind into fine powder, pass through a 120-mesh sieve, and put it into a ball mill for 12h-24h to mix evenly to obtain the mi...

Embodiment 1

[0042] The chemical formula of the present embodiment ceramic material is: 0.85BaTiO 3 -0.15Bi(Mg 2 / 3 Nb 1 / 3 )O 3 -x45B 2 o 3 -45Na 2 B 4 o 7 -10Na 2 SiO 3 (wt%), wherein x represents the mass fraction of BNN glass, and x=1. The preparation method of above-mentioned glass-ceramic material, comprises the following steps:

[0043] (1) Preparation of low-melting-point high-conductivity glass powder: 45 parts of analytically pure B 2 o 3 , 45 parts Na 2 B 4 o 7 and 10 Na 2 SiO 3 The powder is weighed and mixed to prepare 45B 2 o 3 -45Na 2 B 4 o 7 -10Na 2 SiO 3 (BNN) mixed powder, ball milled for 12 hours and mixed evenly, the mixture was dried at 80°C and put into a corundum crucible, melted at 1000°C, kept for 2 hours, the heating rate was 3°C / min, taken out and quenched at high temperature to obtain glass , drying the obtained glass fragments at 80°C, grinding them into fine powder, passing through a 120-mesh sieve, putting them into a ball mill for 24 ho...

Embodiment 2

[0048] The chemical formula of the present embodiment ceramic material is: 0.85BaTiO 3 -0.15Bi(Mg 2 / 3 Nb 1 / 3 )O 3 -x45B 2 o 3 -45Na 2 B 4 o 7 -10Na 2 SiO 3 (wt%), wherein x represents the mass fraction of BNN glass, and x=3. The preparation method of above-mentioned glass-ceramic material, comprises the following steps:

[0049] (1) Preparation of low-melting-point high-conductivity glass powder: 40 parts of analytically pure B 2 o 3 , 50 parts Na 2 B 4 o 7 and 20 Na 2 SiO 3 The powder is weighed and mixed to prepare 40B2 o 3 -50Na 2 B 4 o 7 -20Na 2 SiO 3 (BNN) mixed powder, ball milled for 12 hours and mixed evenly, the mixture was dried at 80°C and put into a corundum crucible, melted at 1000°C, kept for 2 hours, the heating rate was 5°C / min, taken out and quenched at high temperature to obtain glass, Dry the obtained glass shards at 100°C, grind them into fine powder, pass through a 120-mesh sieve, put them into a ball mill for 24 hours and mix them e...

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Abstract

The invention discloses high-conductivity glass powder and a preparation method thereof, and a barium titanate-based glass ceramic based the high-conductivity glass powder, and a preparation method thereof. According to the present invention, 0.85BaTiO3-0.15Bi(Mg2/3Nb1/3)O3(BTBMN) ceramic powder is prepared by using a solid phase method, a low-melting-point high-conductivity glass B2O3-Na2B4O7-Na2SiO3(BNN) is prepared at a temperature of 900-1000 DEG C by using a melting method, high temperature taking and quenching is performed to obtain a glass, and a BTBMN-xBNN(BG)glass ceramic is preparedby using a solid phase method, wherein x represents the mass fraction of the BNN glass, and x is more than or equal to 1% and is less than or equal to 12%; the dense BG glass ceramic is obtained by sintering at a temperature of 850-1225 DEG C by adjusting the glass addition amount; the glass ceramic has an electric field strength of 240 kV/cm, a release energy density of 1.26 J/cm<3> and an energystorage efficiency of 81%, can meet a temperature change rate |[delta]C/C25 DEG C| of less than or equal to 15% within a temperature range of -61-275 DEG C, has good dielectric constant temperature stability, and can meet the temperature stability requirements of general capacitor operation; the glass ceramic material preparation process is simple, the technology is mature, and the method is suitable for industrial production; and the obtained glass ceramic has high puncture strength and good temperature stability.

Description

【Technical field】 [0001] The invention belongs to the field of dielectric energy storage ceramics, in particular to a high-conductivity glass powder and a preparation method thereof, and a barium titanate-based glass ceramic based on high-conductivity glass and a preparation method thereof. 【Background technique】 [0002] High energy storage density dielectrics have high energy density and high power density, and can be used to develop high-capacity capacitors. They have great application potential in pulse power technology, power electronic circuits, electric vehicles, and grid power regulation. However, most of the existing lead-free energy storage ceramic dielectric materials have two major problems. First, the energy storage density of dielectric materials needs to be further improved. High energy storage density can realize the miniaturization of devices, thereby saving costs. The study found that the dielectric constant and breakdown strength of the material determine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00C03C6/00C03C4/14C03C10/02
CPCC03C1/00C03C4/14C03C10/0072C03C12/00
Inventor 王通王渊浩高淑雅杨海波
Owner SHAANXI UNIV OF SCI & TECH
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