Preparation method of lightweight cordierite-based thermal insulation material

A technology of thermal insulation material and cordierite, which is applied in the field of thermal insulation materials, can solve the problems that organic thermal insulation materials are easy to burn, cannot have the same life span of buildings, and have hidden fire safety hazards, etc., and achieves environmental protection, good creep resistance and corrosion resistance. , the effect of low thermal expansion coefficient

Inactive Publication Date: 2014-07-16
HEFEI KESIFU SAFETY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problems exposed by organic thermal insulation materials are becoming more and more prominent. The main points are as follows: 1) Organic thermal insulation materials are easy to burn and have fire safety hazards. Due to the characteristics of the material itself, it is easy to release toxic gases when burned , more likely to cause casualties in the event of a fire
2) The aging problem of organic materials has not been solved. It cannot last the same life as the building. At the same time, there are still problems such as reduced thermal insulation efficiency, cracking and falling off during work.

Method used

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  • Preparation method of lightweight cordierite-based thermal insulation material
  • Preparation method of lightweight cordierite-based thermal insulation material
  • Preparation method of lightweight cordierite-based thermal insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 58 parts of kaolin, 31 parts of attapulgite and 11 parts of magnesium oxide into the ball mill jar, add 0.8% gum arabic, and add an appropriate amount of water to prepare a slurry with a solid content of 30%, and ball mill for 24 h. Add 0.8% sodium lauryl sulfate to foam for 3 minutes, pour the foamed slurry directly into the gypsum abrasive, let it stand for 4 hours and then demould. After drying at room temperature for 24 h, the green body was dried in a drying oven at 100 °C for 24 h, and then sintered at 1200 °C. First, the temperature was raised to 500 °C at a rate of 2 °C / min and kept for 1 h; then the temperature was raised to 1200 °C at a rate of 5 °C / min and kept for 2 h; finally, the temperature was cooled to 500 °C at a rate of 5 °C / min; The furnace is cooled to room temperature to obtain a lightweight cordierite-based thermal insulation material. The X-ray diffraction (XRD) pattern of the lightweight cordierite-based thermal insulation material is shown ...

Embodiment 2

[0026] Add 65 parts of kaolin, 14 parts of attapulgite and 21 parts of magnesium oxide into the ball mill jar, add 1.2% gum arabic, and add an appropriate amount of water to prepare a slurry with a solid content of 35%, and ball mill for 24 h. Add 0.8% sodium lauryl sulfate to foam for 3 minutes, pour the foamed slurry directly into the gypsum abrasive, let it stand for 4 hours and then demould. After drying at room temperature for 24 h, the green body was dried in a drying oven at 100 °C for 24 h, and then sintered at 1200 °C. First, the temperature was raised to 500 °C at a rate of 2 °C / min and kept for 1 h; then the temperature was raised to 1200 °C at a rate of 5 °C / min and kept for 2 h; finally, the temperature was cooled to 500 °C at a rate of 5 °C / min; The furnace was cooled to room temperature to obtain a lightweight cordierite-based insulation material.

[0027] The resulting lightweight cordierite-based insulation material has a porosity of 87% and a bulk density of...

Embodiment 3

[0029] Add 58 parts of kaolin, 13 parts of attapulgite and 29 parts of basic magnesium carbonate into the ball mill jar, add 0.8% gum arabic, add an appropriate amount of water, and prepare a slurry with a solid content of 30%, and ball mill for 24 h. Add 0.8% sodium lauryl sulfate to foam for 3 minutes, pour the foamed slurry directly into the gypsum abrasive, let it stand for 4 hours and then demould. After drying at room temperature for 24 h, the green body was dried in a drying oven at 100 °C for 24 h, and then sintered at 1200 °C. Firstly, the temperature was raised to 500 °C at a rate of 2 °C / min and kept for 1 h; then the temperature was raised to 1200 °C at a rate of 5 °C / min and kept for 2 h; finally, the temperature was cooled to 500 °C at a rate of 5 °C / min; The furnace was cooled to room temperature to obtain a lightweight cordierite-based insulation material.

[0030] The resulting lightweight cordierite-based insulation material has a porosity of 88% and a bulk...

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Abstract

The invention relates to a preparation method of a lightweight cordierite-based thermal insulation material. The thermal insulation material is prepared by sintering the following materials in parts by weight: 43 to 64 parts of kaolin, 11 to 34 parts of attapulgite, and 22 to 29 parts of basic magnesium carbonate, or 50 to 73 parts of kaolin, 14 to 39 parts of attapulgite and 10 to 21 parts of magnesium oxide. The preparation method comprises the following steps: mixing the materials; foaming; grouting; demoulding and drying; sintering. The porosity of the obtained lightweight cordierite-based thermal insulation material ranges from 83% to 90%; the volume density of the thermal insulation material ranges from 270kg / m<3> to 400kg / m<3>; the thermal conductivity coefficient of the thermal insulation material ranges from 0.07W / (m.K) to 0.09W / (m.K); the compressive strength of the thermal insulation material ranges from 0.53MPa to 1.13MPa. The prepared thermal insulation material taking cordierite as a principal crystalline phase is low in thermal conductivity, low in specific gravity, low in thermal expansion coefficient, good in thermal stability and resistant to creep deformation and erosion. The preparation process is simple, easy to operate and low in cost, is energy-saving and environment-friendly, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials used in civil engineering, and in particular relates to the preparation of a light cordierite-based thermal insulation material. Background technique [0002] At present, the insulation materials used for wall insulation in my country are still mainly organic insulation materials. However, the problems exposed by organic thermal insulation materials are becoming more and more prominent. The main points are as follows: 1) Organic thermal insulation materials are easy to burn and have fire safety hazards. Due to the characteristics of the material itself, it is easy to release toxic gases when burned , more likely to cause casualties in the event of a fire. 2) The aging problem of organic materials has not been solved. It cannot last the same life as the building. At the same time, there are still problems such as reduced thermal insulation efficiency, cracking and falling off ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B33/13
Inventor 李晔陆松程旭东龚伦伦
Owner HEFEI KESIFU SAFETY TECH
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