Ultra-high-refractivity environment-friendly cameo glass and preparation method thereof

Abstract

The invention discloses ultra-high-refractivity environment-friendly cameo glass. The cameo glass comprises components in percentage by weight as follows: 10-20% of SiO2, 32-45% of BaO, 35-45% of TiO2, 0-5% of ZnO, 0-8% of ZrO2, 0-3% of K2O, 1-3% of B2O3, 2-5% of CaO, 0.5-2% of La2O3, 0-1.5% of Y2O3, 0.05-0.5% of Nd2O3, 0.02-0.4% of Er2O3 and 0.008-0.02% of NiO. The refractivity of the cameo glass is in a range of 1.9-2.1, the visible light transmittance is in a range of 81-85%, and the cameo glass is pure in color, low in melting temperature and good in chemical stability and has characteristics of easiness in grinding and polishing and the like. The invention further discloses a preparation method of the cameo glass. The melting quality of the glass is guaranteed through secondary melting, and erosion to refractory materials is reduced through low-temperature rapid melting, so that the effect caused by impurities on the quality of the glass is controlled.

Description

technical field [0001] The invention relates to an environment-friendly sapphire glass composition that does not contain harmful oxides such as lead and arsenic, and has high transparency and refractive index. The sapphire glass has a high refractive index of 1.9-2.1, good chemical stability, and visible light transmittance. High, its quality is similar to zircon. technical background [0002] The reason why gemstones are cherished by people is not only because of their rare and precious characteristics, but also because they can present bright colors and different colors after processing and polishing, highlighting their magnificence and nobility. After all, sudden gemstones are rare and limited, and the price is high, which is difficult for ordinary people to accept. Because of the high price of gemstones, a large number of imitation gemstone materials have appeared. With the continuous development of industrial materials and production and processing technology, a large ...

AI Technical Summary

Problems solved by technology

At present, the quality of imitation sapphire glass in the market is not high enough, and it is uneven. Although there are better samples, such as optical glass, most of them are mainly composed of high lead or rare earth, which has great environmental problems and high cost.

[0004] Patent CN101381202A discloses a formula and preparation method of antimony ruby ​​glass. Although it is environmentally friendly, it has a large quality gap compared with gemstones with a refractive index above 2.0 and better dispersion.