Borate silicate aluminate glass bead, and preparation method thereof

Abstract

The invention provides a borate silicate aluminate glass bead. The borate silicate aluminate glass bead comprises, by mass, 50 to 58% of silica, 3 to 8% of boron oxide, 5 to 10% of alumina, 12 to 18% of sodium oxide, 8 to 15% of calcium oxide, 0 to 1.5% of magnesium oxide. The invention also provides a preparation method of the borate silicate aluminate glass bead. The preparation method comprises a step of raw material preparation, wherein a raw material comprises, by weight, 2.6 to 2.7 parts of carbon black, 0.7 to 0.9 part of boric acid, 2 to 2.3 parts of a calcium salt, 1.6 to 1.8 parts of sodium nitrate, 2.5 to 2.8 parts of aluminium nitrate, 0.2 to 0.4 part of magnesium nitrate, and 0 to 0.1 part of alumina silicate. The preparation method possesses following advantages: the finished product yield is high, water flotation is not needed, flotation ratio is 99% or higher, the compressive strength is high, quality is stable, and the density and the compressive strength are high in uniformity.

Description

technical field [0001] The invention provides a borosilicate alumino-silicate glass microsphere and a preparation method thereof, belonging to the technical field of inorganic non-metallic materials. Background technique [0002] Hollow glass microspheres are hollow glass spheres with a small size. They have the advantages of light weight, low thermal conductivity, compression resistance, high dispersion, sound insulation, electrical insulation and thermal stability. They are widely used in recent years. , A new lightweight material with excellent performance. [0003] Two methods are generally used to prepare hollow glass microspheres: soft chemical method and solid phase powder method. [0004] The Chinese patent (publication number CN102583973A) discloses a soft chemical preparation method of hollow glass microspheres and the hollow glass microspheres and their applications. The production method is a soft chemical method. 0-5%, density 0.1-0.7g / cm 3 , Compressive stre...

AI Technical Summary

Problems solved by technology

[0007] Chinese patent CN101638295A discloses a kind of hollow glass microsphere and its production method, and gives "after melting and clarifying the mixed raw materials, 100 kg of cullet can be produced. The melting temperature and the corresponding clarification temperature are as follows: The manufacturing temperature is 1400-1550°C, and the clarification temperature is 1580°C”; the defect of this patent is that the melting and clarification process takes a long time, and the prepared hollow glass microspheres have low compressive strength

[0012] (2) In the process of preparing glass beads, if the clarification process is removed, there will be more bubbles in the glass liquid, and the size of the bubbles will be uneven, and the quality of the prepared product will be unstable.

[0013] (3) The compressive strength of the product is low

[0014] (4) Long melting time, high sintering temperature and high energy consumption

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