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Lightweight iolite-mullite composite ceramic material and preparation method thereof

A technology of composite ceramics and composite materials, which is applied in the field of lightweight cordierite-mullite composite ceramic materials and its preparation, can solve the problems of uneven distribution of phase composition, low thermal shock resistance, and high impurity content, and achieve Uniform distribution, low price, high reactivity effect

Inactive Publication Date: 2014-07-16
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the currently prepared porous lightweight cordierite-mullite composite ceramic materials have the following disadvantages: low strength, uneven distribution of phase composition, high impurity content, and low thermal shock resistance

Method used

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  • Lightweight iolite-mullite composite ceramic material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A light cordierite-mullite composite ceramic material and a preparation method thereof. The concrete steps of this method are:

[0024] Step 1, using 20-40wt% diaspore, 10-18wt% amorphous silica, 20-30wt% talcum powder and 30-40wt% clay as raw materials, plus 7-10wt% of the raw materials Water, stir evenly, machine press molding under the condition of 60~80MPa, dry the molded green body at 100~150℃ for 12~24 hours, raise the temperature to 1250~1280℃, keep it warm for 2~4 hours, and make porous viola Bluestone-mullite composite.

[0025] Step 2, breaking the obtained porous cordierite-mullite composite material into porous cordierite-mullite composite material particles with a particle size of 2-1 mm, and porous cordierite-mullite composite material with a particle size of 1-0.088 mm Material particles and porous cordierite-mullite composite material powder with particle size less than 0.088mm.

[0026] Step 3, with 20~40wt% of porous cordierite-mullite composite mat...

Embodiment 2

[0030] A light cordierite-mullite composite ceramic material and a preparation method thereof. The concrete steps of this method are:

[0031] Step 1, using 30~50wt% diaspore, 15~20wt% amorphous silica, 15~20wt% talcum powder and 20~30wt% clay as raw materials, plus 5~7wt% of the raw materials Water, stir evenly, machine press molding under the condition of 60~80MPa, dry the molded green body at 150~300℃ for 24~36 hours, raise the temperature to 1280~1320℃, keep it warm for 4~6 hours, and make porous viola Bluestone-mullite composite.

[0032]Step 2, breaking the obtained porous cordierite-mullite composite material into porous cordierite-mullite composite material particles with a particle size of 2-1 mm, and porous cordierite-mullite composite material with a particle size of 1-0.088 mm Material particles and porous cordierite-mullite composite material powder with particle size less than 0.088mm.

[0033] Step 3, with 30~50wt% of porous cordierite-mullite composite mater...

Embodiment 3

[0037] A light cordierite-mullite composite ceramic material and a preparation method thereof. The concrete steps of this method are:

[0038] Step 1, using 50-70wt% diaspore, 15-25wt% amorphous silica, 5-15wt% talcum powder and 10-20wt% clay as raw materials, plus 3-5wt% of the raw materials Water, stir evenly, machine press molding under the condition of 80~100MPa, dry the molded green body at 150~300℃ for 12~24 hours, raise the temperature to 1300~1350℃, keep it warm for 2~4 hours, and make porous viola Bluestone-mullite composite.

[0039] Step 2, breaking the obtained porous cordierite-mullite composite material into porous cordierite-mullite composite material particles with a particle size of 2-1 mm, and porous cordierite-mullite composite material with a particle size of 1-0.088 mm Material particles and porous cordierite-mullite composite material powder with particle size less than 0.088mm.

[0040] Step 3, with 40~50wt% of porous cordierite-mullite composite mate...

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Abstract

The invention provides a lightweight iolite-mullite composite ceramic material and a preparation method thereof. According to a technical scheme in the invention, the preparation method comprises the following steps: with 20 to 70 wt% of diaspore, 10 to 30 wt% of amorphous silica, 5 to 30 wt% of talcum powder and 10 to 40 wt% of clay as raw materials, adding 3 to 10 wt% of water and carrying out stirring, molding, drying and maintenance at a temperature of 1250 to 1350 DEG C for 2 to 6 h so as to prepare a porous iolite-mullite composite material; and then with composite material particles respectively with a particle size of 2 to 1 mm and a particle size of 1 to 0.088 mm as aggregate and powder with a particle size of less than 0.088 mm as a matrix, adding dextrin water and successively carrying out uniform mixing, molding, drying and maintenance at a temperature of 1250 to 1350 DEG C for 2 to 6 h so as to prepare the lightweight iolite-mullite composite ceramic material. The preparation method has the characteristics of low cost, environment friendliness, energy conservation, environment friendliness and controllable chemical composition; and the prepared lightweight iolite-mullite composite ceramic material has small volume density, uniform phase component and pore size distribution, excellent mechanical properties at normal temperature, good high temperature performance and high thermal shock resistance.

Description

technical field [0001] The invention belongs to the technical field of lightweight composite ceramic materials. Specifically relates to a light cordierite-mullite composite ceramic material and a preparation method thereof. Background technique [0002] With the rapid development of the ceramic industry, ceramic products tend to be high-quality, high-yield and low-consumption, and the firing process tends to be fast-firing technology, which makes cordierite-mullite kiln furniture materials widely popularized. At present, there have been many researches on cordierite-mullite kiln furniture at home and abroad, and its manufacturing methods can generally be summarized into the following three types: (1) Pre-synthesize cordierite and mullite clinker separately, as aggregate (2) Pre-synthesize mullite clinker as aggregate, and then generate cordierite in situ in the matrix; (3) Direct in situ synthesis of cordierite-mullite composites . The first two types are mainly used in ...

Claims

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Application Information

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IPC IPC(8): C04B35/195C04B35/185C04B35/622C04B35/66
Inventor 梁峰叶林峰赵雷薛正良方伟王富成陈辉陈欢
Owner WUHAN UNIV OF SCI & TECH
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