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Preparation method of high-strength porous glass

A porous glass and high-strength technology, applied in the field of preparation of high-strength porous glass, can solve the problems of inability to produce large-format products, limited improvement of mechanical properties of porous glass, and low flexural strength

Inactive Publication Date: 2011-08-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foam glass prepared by this method has small pore size and low flexural strength
CN200946127Y discloses a kind of foam glass with wire mesh, which solves the problem of low mechanical strength of foam glass, but still cannot solve the problem of light weight, and cannot produce large-format products, and the problems of complicated use procedures, construction quality and difficult effect guarantee
However, the mechanical strength of the refractory fiber is also greatly reduced during the foaming process of the porous glass.
Therefore, the improvement of the mechanical properties of porous glass is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: 1) first clean the cullet, and ball mill it to obtain glass powder below 270 mesh after drying;

[0020] 2) Then by mass fraction 90% glass powder, 1.5% SiC, 3.5% borax, 3% NaNO 3 and 2% of high-strength, high-temperature-resistant, high-silica fibers with a diameter of 0.01 to 0.05 mm and a length of 1 to 100 mm are added to a ball mill tank and ball milled for 30 minutes to obtain a batch;

[0021] 3) Add the batch material into the heat-resistant steel mold, compact the mold, and finally move the mold with the batch material into the foaming furnace and burn it according to the following process;

[0022] In the preheating stage, after heating up from room temperature to 400°C at a heating rate of 15°C / min, keep it warm for 20 minutes;

[0023] In the foaming stage, the heating rate is 5°C / min to 820°C;

[0024] In the foam stabilization stage, keep warm at a constant temperature of 820°C for 30 minutes;

[0025] In the rapid cooling stage, the cooli...

Embodiment 2

[0028] Embodiment 2: 1) first clean the cullet, and ball mill it to obtain glass powder below 270 mesh after drying;

[0029] 2) then by mass fraction 74% glass powder, 2% SiC, 2% borax, 2% NaNO 3 and 20% of the high-strength, high-temperature-resistant, high-silica fibers with a diameter of 0.01 to 0.05 mm and a length of 1 to 100 mm are added to a ball mill tank and ball milled for 10 minutes to obtain a batch;

[0030] 3) Add the batch material into the heat-resistant steel mold, compact the mold, and finally move the mold with the batch material into the foaming furnace and burn it according to the following process;

[0031] In the preheating stage, the temperature is raised from room temperature to 400°C at a rate of 10°C / min, and then kept for 30 minutes;

[0032] In the foaming stage, the heating rate is 8°C / min to 830°C;

[0033] In the bubble stabilization stage, keep warm at a constant temperature of 830°C for 25 minutes;

[0034] In the rapid cooling stage, the co...

Embodiment 3

[0037] Embodiment 3: 1) first clean the cullet, and ball mill it to obtain glass powder below 270 mesh after drying;

[0038] 2) then by mass fraction 80% glass powder, 4% SiC, 5% borax, 4% NaNO 3 and 7% of high-strength, high-temperature-resistant, high-silica fibers with a diameter of 0.01 to 0.05 mm and a length of 1 to 100 mm are added to a ball mill tank and ball milled for 60 minutes to obtain a batch;

[0039] 3) Add the batch material into the heat-resistant steel mold, compact the mold, and finally move the mold with the batch material into the foaming furnace and burn it according to the following process;

[0040] In the preheating stage, the temperature is raised from room temperature to 400°C at a rate of 18°C / min, and then kept for 15 minutes;

[0041] In the foaming stage, the heating rate is 10°C / min to 840°C;

[0042] In the foam stabilization stage, keep warm at a constant temperature of 840°C for 20 minutes;

[0043] In the rapid cooling stage, the coolin...

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PUM

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Abstract

The invention relates to a preparation method of high-strength porous glass, which comprises the following steps: firstly, cleaning glass cullet, and ball-grinding the glass cullet to 270 meshes or below to obtain glass powder; then, adding the glass powder, SiC, borax, NaNO3 and high-strength high-temperature-resistant high-silica fibers into a ball milling tank, and carrying out ball milling to obtain a glass batch; and finally, adding the glass batch into a heat-resistant steel mold to sequentially be subjected to a preheating stage, a foaming stage, a foam stabilizing stage, a quick cooling stage and an annealing stage, thus obtaining the foam glass. The density of the foam glass obtained by the preparation method is 0.1-0.6g / cm<3>, the pore diameter is 0.3-5.0mm, the pore size distribution is uniform, and the folding strength is up to 3.0-10.0MPa.

Description

technical field [0001] The invention relates to a method for preparing porous glass, in particular to a method for preparing high-strength porous glass used in the field of industrial and civil buildings or military anti-riot, earthquake-proof and other building environments. Background technique [0002] In the past few decades, the shocking natural disasters and man-made terrorist attacks all over the world have caused the collapse of buildings, resulting in the casualties of tens of thousands of lives and innumerable property losses. For example, the earthquake that occurred in Tangshan City, Hebei Province, my country on July 28, 1976 killed more than 240,000 people and injured 160,000 people. In 1993, terrorists detonated a car bomb in the garage of the World Trade Center in New York City, causing significant loss of life and property. In 1998, the U.S. embassies in Nairobi and Dar es Salaam were also attacked by terrorist car bombs, causing heavy loss of life and prop...

Claims

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Application Information

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IPC IPC(8): C03C11/00
Inventor 赵彦钊程爱菊郭晓琛郭宏伟
Owner SHAANXI UNIV OF SCI & TECH
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