High-strength and high-fire-resistance oxygen-nitrogen foam glass and preparation method thereof

Abstract

The invention relates to a high-strength and high-fire-resistance oxygen-nitrogen foam glass and a preparation method thereof and belongs to the field of inorganic nonmetallic materials. The preparation method comprises mixing basalt and nitrides for high-temperature melting in a nitrogen or ammonia atmosphere to obtain an oxygen-nitrogen glass; crushing the oxygen-nitrogen glass into powder, heating the glass powder inside a refractory mold to 1100-1200 DEG C in an air atmosphere, then keeping the temperature for 2-60 min to obtain the high-strength and high-fire-resistance oxygen-nitrogen foam glass. According to the high-strength and high-fire-resistance oxygen-nitrogen foam glass, elemental nitrogen is distributed in an atomic scale inside the glass structure, and then nitrogen is oxidized into uniformly-distributed bubbles.

Description

technical field [0001] The invention relates to a high-strength and high-refractority oxygen-nitrogen foam glass and a preparation method thereof. After mixing basalt and nitride, the basic oxygen-nitrogen glass is obtained by melting at a high temperature under a protective atmosphere, and then using the oxygen-nitrogen glass structure in an air atmosphere A small amount of nitrogen is oxidized and foamed at high temperature to prepare oxygen-nitrogen foam glass, which belongs to the field of inorganic non-metallic materials. Background technique [0002] Because of its heat insulation, corrosion resistance, low density, and certain fire protection compared with organic polymer materials, foam glass has been widely used as a functional material. The raw materials for preparing foam glass in the current technology generally use waste glass, waste glass fiber, tailings and other industrial wastes, such as patent CN101955319A using waste glass fiber to prepare foam glass; pate...

AI Technical Summary

Problems solved by technology

The foaming agent for foam glass prepared by the current technology is in the form of powder particles, which cannot be evenly distributed on a microscopic scale, resulting in uneven foaming, which affects the strength of the foam glass

Finally, the foam glass prepared by the current technology is mostly alkali-silicate glass, which also has the problems of low strength and low refractoriness

[0003] In addition, the current preparation of foam glass, the foaming process is basically to add foaming agents such as carbon black, carbonate, etc., because carbonate generally decomposes at about 800°C, and the softening point of oxynitride glass is generally higher than 800°C, so oxygen Nitrogen glass is not suitable for foaming with carbonate

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