Preparation method of low density and high strength foam glass sintering at low temperature

Abstract

The invention discloses a preparation method of low density and high strength foam glass sintering at low temperature. The glass powder is prepared from: by mass, SiO2 55.3-61.6%, Na2CO3 13.3-18.6%, CaCO3 9.0-11.6%, Al2O3 5-5.7%, MgCO3 3.56-5.8%, K2CO3 0.73-3.7%, Fe2O3 0.51-1.2%, BaCO3 0.53-1.1%, Na2SO4 0.47-0.9%, SrO 0.05-0.3%. The foam glass is prepared from glass powder, lithium carbonate using as a foaming agent 4-8 m%, and foam stabilizer 0-2 m% or foaming promoter 0-2 m%. The foam glass is prepared by sintering at low temperature of 725-775 DEG C and using a practical powder sintering method having convenient operation. The foam glass prepared by the invention has uniform pores, low density, and good mechanical properties, the properties such as porosity and water absorption can all reach the use standard, and the color is pure which is convenient to dye. In addition, the method can reduce the production cost, and can substantially improve the production efficiency.

Description

technical field [0001] The invention relates to a multifunctional material with light weight, high strength, heat preservation and sound insulation, in particular to a preparation method of low-temperature firing foam glass. Background technique [0002] Foam glass is an inorganic non-metallic foam material composed of a glass phase and a large number of uniform pores with a diameter of 0.5-5 mm. Foam glass has many excellent properties such as light weight and high strength, heat insulation and cold preservation, waterproof and anti-corrosion, non-toxic and non-combustible, chemical stability, insect resistance and bacteriostasis, ecological environmental protection, etc., making foam glass in many fields such as low temperature insulation, pipeline protection, noise reduction and noise reduction. has an irreplaceable role. But only a small amount of foam glass products are put into industrial production at present, and the output is also very limited. In the past, the ma...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art that the foaming temperature is high, the porosity and the mechanical properties are not ideal enough, and provide a kind of mechanical properties such as low bulk density, relatively uniform pores, and compressive strength, and can A method for preparing cellular glass products that meet usage standards, are pure in color, and can be sintered at low temperature. In addition, firing cellular glass at a low temperature can not only reduce its production cost, but also greatly improve its production efficiency

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