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Low temperature sintered glass-ceramic composite insulating material and preparation method thereof

A technology of glass ceramics and composite insulation, applied in the field of material science, can solve the problems of poor process controllability, large energy consumption, and high sintering temperature

Inactive Publication Date: 2015-08-19
ZHEJIANG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] CaO-B 2 o 3 -SiO 2 (referred to as CBS) glass has the characteristics of low raw material cost and low softening point (~690°C), and CaSiO is easy to precipitate during sintering. 3 Crystal, the precipitated CaSiO 3 With low dielectric constant and dielectric loss, it can be used as a candidate material for high-performance insulating materials, but it has low density and flexural strength, and poor process controllability
al 2 o 3 Ceramics have the advantages of high bending strength and good insulation, but their sintering temperature is high (above 1600 ° C), and energy consumption is large

Method used

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  • Low temperature sintered glass-ceramic composite insulating material and preparation method thereof

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Embodiment Construction

[0015] The following examples can make those skilled in the art understand the present invention more fully, but do not limit the present invention in any way:

[0016] The present invention will be further described below in conjunction with embodiment.

[0017] (1) The composition formula of CBS glass is CaO: B 2 o 3 : SiO 2 The mass percentage is 40%: 20%: 40%. First weigh the CBS glass raw material according to the formula, where B 2 o 3 with H 3 BO 3 form introduced, and B 2 o 3 with the introduced H 3 BO 3 The molar ratio is 1:2; CaO to CaCO 3 form introduced, and CaCO 3 The molar ratio to CaO is 1:1.

[0018] Each raw material was added into a planetary ball mill for ball milling and mixing for 4 hours, and was melted at 1450° C. for 4 hours in an alumina crucible. The melted glass was quenched in water, crushed through a 20-mesh sieve, and the sieved glass powder was put into a planetary ball mill jar for ball milling for 4 hours to obtain CBS glass powde...

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Abstract

The invention relates to the field of the material science, and aims at providing a low temperature sintered glass-ceramic composite insulating material and a preparation method thereof. The chemical expression formula of the glass-ceramic composite insulating material is xAl2O3-(1-x)CBS, x is 5-15wt%, and CBS is 40wt%CaO-20wt%B2O3-40wt%SiO2. The addition of Al2O3 makes parts of Al2O3 fused into glass and reduces the CaSiO3 enrichment area, so the crystallization amount and the crystal growth are reduced to a certain degree, the viscosity increase of a molten glass phase is alleviated, and the densification effect is improved, thereby the Al2O3 / CBS composite insulating material maintains good dielectric properties and compactness, and can perfectly meet application demands of high tension transmission line insulation, microelectronic substrates and high frequency capacitance.

Description

technical field [0001] The invention relates to a formula of a low-temperature sintered glass-ceramic composite insulating material and a preparation method thereof, belonging to the field of material science. Background technique [0002] Glass-ceramic composite insulating materials are widely used in high-voltage transmission line insulation, microelectronic packaging and other fields. In these technical fields, the production and application of insulating components requires that the insulating materials used not only have good electrical and thermal properties, but also have good process characteristics. [0003] CaO-B 2 o 3 -SiO 2 (referred to as CBS) glass has the characteristics of low raw material cost and low softening point (~690°C), and CaSiO is easy to precipitate during sintering. 3 Crystal, the precipitated CaSiO 3 With low dielectric constant and dielectric loss, it can be used as a candidate material for high-performance insulating materials, but its den...

Claims

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Application Information

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IPC IPC(8): C03C10/00
Inventor 张启龙刘进壮杨辉周珏辉
Owner ZHEJIANG UNIV
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