Environment friendly heavy-lanthanide flint optical glass

Abstract

The present invention provides environmental-friendly dense-lanthanum optical flint glass, comprising the following compositions in percentage by weight: 2 to 6 percent of SiO2, 16 to 25 percent of B2O3, 10 to 20 percent of La2O3, 15 to 25 percent of Nb2O5, 0 to 3 percent of Li2O, 1.5 to 6 percent of Na2O, 0 to 3 percent of K2O, 0 to 3 percent of MgO, 1 to 5 percent of CaO, 0 to 3 percent of SrO, 8 to 22 percent of BaO, 3 to 12 percent of TiO2, 4 to 9 percent of ZrO2, 0 to 3 percent of GeO2, 0 to 3 percent of WO3, 0 to 3 percent of P2O5, 0 to 3 percent of Gb2O3, 0 to 3 percent of Ta2O5, and 0 to 1 percent of Sb2O3. The optical flint glass has a refractive index between 1.81 and 1.90, an Abbe number between 25 and 33, and no PbO and As2O3, and has perfect optical property and excellent devitrification resistance.

Description

technical field

[0001] The invention relates to lead-free, arsenic-free heavy lanthanum flint optical glass with high refractive index and high dispersion. Background technique

[0002] In recent years, with the development of the optoelectronic industry, the requirements for miniaturization, light weight and high performance of optical components have been put forward. High refractive index glasses with a refractive index above 1.81 are suitable as optical components for manufacturing such miniaturized and lightweight optical components. glass material. Traditionally used optical glass with a high refractive index usually contains PbO to obtain ideal optical performance, but with the improvement of people's environmental awareness, more and more countries have proposed the environmental protection requirements of lead-free and arsenic-free optical materials . We know that the introduction of TiO in silicate-based or borate-based glasses 2 , Nb 2 o 5 , La 2 o 3 , Y 2...

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