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Cordierite-based glass ceramic combined Al2O3-SiO2 system ceramic material and preparation method thereof

A technology for glass-ceramic and ceramic materials, applied in the field of ceramic materials, can solve the problems of difficult sintering of ceramics, high thermal expansion coefficient, poor sintering effect, etc., and achieve the effect of reducing sintering temperature, excellent sintering performance, and solving poor sintering performance.

Active Publication Date: 2021-08-06
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sintering effect of directly adding cordierite is not good, and it is difficult to solve the Al 2 o 3 -SiO 2 The disadvantages of ceramics are difficult to sinter and high thermal expansion coefficient

Method used

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  • Cordierite-based glass ceramic combined Al2O3-SiO2 system ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. In this embodiment, a cordierite-based glass-ceramic bonded with Al 2 o 3 -SiO 2 The system ceramic material includes a base material and a binder. The base material is composed of cordierite-based glass-ceramic powder (75 μm in particle size) 30wt%, mullite aggregate 60wt% (wherein, 30 wt% of particle size 30 mesh, 10wt% of particle size 80 mesh %, particle size 325 mesh 20wt%), corundum aggregate (particle size 120 mesh) 10wt%. Among them, the composition of cordierite-based glass-ceramic powder is MgO 17wt%, Al 2 o 3 23 wt%, SiO 2 60 wt%. The binding agent is a PVA solution with a concentration of 5wt%, and its dosage is 8wt% of the base material.

[0024] 2. In this example, cordierite-based glass-ceramic bonded with Al 2 o 3 -SiO 2 The preparation method of system ceramic material, its steps are as follows:

[0025] (1) After mixing according to the composition ratio of the above-mentioned cordierite-based glass-ceramic powder, place it in an electric ...

Embodiment 2

[0029] 1. In this embodiment, a cordierite-based glass-ceramic bonded with Al 2 o 3 -SiO 2The system ceramic material includes a base material and a binder. The base material is composed of cordierite-based glass-ceramic powder (35 μm in particle size) 20 wt %, mullite aggregate (50 mesh in particle size) 10 wt %, and corundum aggregate 60 wt % (where , particle size 30 mesh 40wt%, particle size 200 mesh 10wt%, particle size 325 mesh 10wt%), quartz aggregate 10wt% (particle size 325 mesh). Among them, the composition of cordierite-based glass-ceramic powder is MgO 15wt%, Al 2 o 3 25 wt%, SiO 2 60 wt%. The binding agent is a PVA solution with a concentration of 5wt%, and its dosage is 12wt% of the base material.

[0030] 2. In this example, cordierite-based glass-ceramic bonded with Al 2 o 3 -SiO 2 The preparation method of system ceramic material, its steps are as follows:

[0031] (1) After mixing according to the composition ratio of the above-mentioned cordierite-...

Embodiment 3

[0035] 1. In this embodiment, a cordierite-based glass-ceramic bonded with Al 2 o 3 -SiO 2 The system ceramic material includes a base material and a binder. The base material is composed of cordierite-based glass-ceramic powder (10 μm in particle size) 5 wt %, mullite aggregate (60 mesh in particle size) 10 wt %, and corundum aggregate 60 wt % (where , particle size 30 mesh 30wt%, particle size 500 mesh 30wt%), quartz aggregate 25wt% (grain size 120 mesh 15wt%, particle size 325 mesh 10wt%). Among them, the composition of cordierite-based glass-ceramic powder is MgO19wt%, Al 2 o 3 25 wt%, SiO 2 56 wt%. The binding agent is a PVA solution with a concentration of 5wt%, and its dosage is 10wt% of the base material.

[0036] 2. In this example, cordierite-based glass-ceramic bonded with Al 2 o 3 -SiO 2 The preparation method of system ceramic material, its steps are as follows:

[0037] (1) After mixing according to the composition ratio of the above-mentioned cordierit...

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Abstract

The invention discloses a cordierite-based glass ceramic combined Al2O3-SiO2 system ceramic material, which comprises a base material and a binding agent, the base material comprises 5-30 wt% of cordierite-based glass ceramic powder, 10-60 wt% of mullite aggregate, 10-60 wt% of corundum aggregate, and 0-30 wt% of quartz aggregate; the cordierite-based microcrystalline glass powder is prepared from the following components in percentage by weight: 15 to 22 percent of MgO, 20 to 25 percent of Al2O3 and 25 to 60 percent of SiO2; and the use amount of the binding agent is 8-12wt% of the base material. In addition, the invention also discloses a preparation method of the cordierite-based glass ceramic combined Al2O3-SiO2 system ceramic material. According to the invention, cordierite-based microcrystalline glass is taken as a sintering aid, and cordierite crystals are added into an Al2O3-SiO2 system ceramic matrix in an in-situ synthesis manner, so that not only is a low-temperature sintering aid provided, but also the performance of the Al2O3-SiO2 system ceramic material is effectively improved; and the method has important significance in improving the quality of the Al2O3-SiO2 system ceramic material and saving the product cost, and is beneficial to popularization and application as well as progress and development of the industry technology.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a cordierite-based glass-ceramics combined with Al 2 o 3 -SiO 2 Systematic ceramic materials and methods for their preparation. Background technique [0002] Al 2 o 3 -SiO 2 Ceramics (corundum, mullite, corundum-mullite ceramics, etc.) have been widely used in refractory materials, aerospace, environmental protection, energy and other fields because of their excellent refractoriness, mechanical properties and chemical stability. application. With scientific and technological workers on Al 2 o 3 -SiO 2 The understanding of the excellent properties of ceramics will be deepened, and its application range will be further expanded. However, high thermal expansion coefficient and high sintering temperature (>1600°C) have always been constraints on Al 2 o 3 -SiO 2 It is a key issue in the development of high-temperature structural ceramics. This is because hig...

Claims

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Application Information

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IPC IPC(8): C04B35/185C04B35/64
CPCC04B35/185C04B35/64C04B2235/36C04B2235/3481C04B2235/3217C04B2235/3418C04B2235/6567C04B2235/9607
Inventor 徐笑阳劳新斌涂治
Owner JINGDEZHEN CERAMIC INSTITUTE
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