High-strength pore-closed mullite material and preparation method thereof

A mullite and closed-cell technology, which is applied in the preparation of new porous ceramics or porous refractory materials, high-strength closed-pore mullite materials and their preparation, can solve problems such as environmental pollution and adverse effects on material erosion resistance, and achieve Good corrosion resistance, high load softening temperature point, and controllable pore size
CN106431371AInactive Publication Date: 2017-02-22ZHENGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHENGZHOU UNIV
Publication Date
2017-02-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a high-strength pore-closed mullite material and a preparation method thereof. The material comprises, by weight, 30-84wt% of alumina raw material, 1-55wt% of alumina-silica raw material, 15-60% of silica raw material and 2-10wt% of additive. The preparation method includes: mixing the raw materials according to the above proportion, adding the additive, stirring well, and pouring into a die; performing mechanical pressing under 80-150MPa to obtain a blank, and drying the blank at 60-140 DEG C for 3-16h; putting the blank in a high-temperature kiln for calcining to obtain the high-strength pore-closed mullite material. Sintering in-situ pore forming technology is adopted, so that the high-strength pore-closed mullite material prepared by the method has the advantages of high closed porosity, high pressure-resistant strength and high refractoriness under load and can be used for a long time at high temperature of 1550-1700 DEG C.
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Description

technical field

[0001] The invention belongs to the technical field of inorganic non-metallic materials, and relates to a preparation method of novel porous ceramics or porous refractory materials, in particular to a high-strength closed-pore mullite material and a preparation method thereof.

[0002] technical background

[0003] With the continuous deterioration of the environment, energy-saving materials have become one of the important directions of new materials. In order to further reduce emissions in high-temperature industries, lightweight porous refractory materials have been widely used. Due to the high open porosity, poor strength and wear resistance, low softening temperature under load, and poor corrosion resistance in traditional porous materials, they can only be used in low-temperature heat insulation layers and are not directly in contact with high-temperature melts. used in the working layer.

[0004] In order to overcome the shortcomings of traditional po...

Claims

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