Nano-multicrystal phase glass ceramics and its production method

Abstract

The present invention discloses a nano multicrystal phase glass-ceramic. Its composition includes (by wt%) 70% of silicon dioxide, 3.1%-4% of lithium oxide, 15% of aluminium oxide, 0.7%-1.2% of magnesium oxide, 0.8%-1.4% of zinc oxide, 0.4%-0.7% of calcium oxide, 0.2% of boron oxide, 1.8%-3.2% of titanium oxide, 1.5%-2.3% of zirconium oxide, 1.8%-2.1% of mixture of potassium oxide and sodium oxide, 0.1%-2.0% of lithium fluoride and / or phosphorus pentoxide and 0.8%-0.9% of mixture of arsenium oxide and antimony oxide. Its production method includes the following steps: grinding the above-mentioned components, uniformly mixing them to obtain mixed material, melting at 1350-1650deg.C, forming, annealing, nucleating for 1-4hr at 500-800deg.C, then heating to 700-1000deg.C and making crystallization treatment for 1-12hr so as to obtain the invented product.

Description

technical field [0001] The invention relates to a glass ceramic and a production method thereof, in particular, a glass ceramic with a polycrystalline phase composition and a crystal grain size in the nanoscale range and a production method thereof. Background technique [0002] Glass ceramics are polycrystalline solid materials produced by controlled crystallization of glass. In this specification, the term "nanocrystal" means that after nucleation and crystallization, the crystal grain size of glass ceramics and products is in the nanoscale range of 1-100 nm. Spherical crystals refer to the size of their diameter, and axial crystals refer to the size of their axial diameter. As stated by Macmillan, a striking characteristic of glass-ceramics is its extremely fine grain size, and it is likely that this characteristic largely determines the valuable properties of the material, how the method of production of the glass-ceramic and its properties It is very valuable to corre...

AI Technical Summary

Problems solved by technology

[0005] In addition, in the past, when glass ceramics were heat treated at low temperature, glass ceramics whose main crystal phase was β-quartz solid solution were obtained. After heat treatment, the main crystal phase changed to glass ceramics of β-spodumene, so there was β-quartz solid solution The process of transforming bulk to β-spodumene, which may lead to changes in the structure and properties of glass ceramics

Images