Preparation of Thermal Insulation Block by Slip Casting and Drying at Ambient Pressure and Room Temperature

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Journal of Materials Engineering ›› 2011, Vol. 0 ›› Issue (9) : 33-38.

Preparation of Thermal Insulation Block by Slip Casting and Drying at Ambient Pressure and Room Temperature

ZHANG Ming-can, ZENG Ren-jie

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Abstract

A thermal insulation block with suitable compressive strength was prepared.Silica aerogel was used as a matrix,E-glass fiber as a framework,titanium dioxide as an opacifier.Compressive strength(R),thermal conductivity(λ) and volume resistivity(ρ) at room temperature(25℃) were measured,respectively.Results show that the aqueous slurry is well dispersed when pH=8-9;the sample heated at 730℃ for 0.5h has a lower density(D) of 151kg·m^-3 compared with The Standard of American Society for Testing of Materials(ASTM C533—85),and the same R value 0.41MPa as the standard.At ambient pressure,the sample has thermal conductivity(λ_n) of 0.036W·m^-1·K^-1. at room temperature and 0.061W·m^-1·K^-1. at 480℃,respectively.The values are lower or much lower than those of traditional thermal insulation blocks,respectively.The preparation processing of thermal insulation block was investigated systematically.The white Portland cement clinker was creactively used as a binder,and the block was made by slip casting and then being dried at ambient pressure and room temperature.Both the raw materials and the sample are non-toxic.This project has good industrialization prospects owing to its processing simple and low cost.

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silica aerogel / E-glass fiber / titanium dioxide / white Portland cement clinker

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ZHANG Ming-can, ZENG Ren-jie. Preparation of Thermal Insulation Block by Slip Casting and Drying at Ambient Pressure and Room Temperature[J]. Journal of Materials Engineering, 2011, 0(9): 33-38

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