H-ZBaF type optical glass and preparation method thereof

Abstract

The invention discloses H-ZBaF type optical glass and a preparation method thereof. The H-ZBaF type optical glass is prepared from the following chemical components in parts by weight: 30 to 45 parts of SiO2, 0 to 6 parts of CaO, 5 to 10 parts of B2O3, 25 to 45 parts of BaO, 0 to 3 parts of Al2O3, 7 to 12 parts of TiO2, 0 to 0.2 part of Sb2O3, 0 to 11 parts of ZnO, 1 to 4 parts of MgO and 0 to 5 parts of R2O, wherein R2O is selected from one or two of K2O and Na2O. The H-ZBaF type optical glass disclosed by the invention does not contain components including PbO, As2O3, CdO and the like which have great environmental hazards; a product has the refractive index (nd) of 1.62 to 1.72, the Abbe number (vd) of 38 to 53 and good smelting performance, and is easy to mold; the product does not contain expensive components including Nb2O5, Ta2O5, Bi2O3, GeO2 and the like, so that the product has a cheap price and can meet market requirements on the optical glass relatively well.

Description

technical field [0001] The invention belongs to the field of glass preparation, in particular to an H-ZBaF optical glass and a preparation method thereof. Background technique [0002] In recent years, with the increasing emphasis on environmental protection, the impact of glass production, processing and use on the environment has also attracted more and more attention. China and other countries have also issued corresponding policies, calling for vigorous development of PbO and As-free 2 O 3 , CdO and other green glass. [0003] In addition, the optical glass with a refractive index of 1.62 to 1.72 and an Abbe number of 38 to 53 belongs to the heavy crown optical glass, which is widely used in imaging lenses, telescopes, gun sights and other optical systems, and is the largest amount in the field of optical glass. Great base material. With the increasingly fierce competition in terminal markets such as cameras and telescopes, terminal manufacturers hope to obtain optica...

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Problems solved by technology

[0004] At present, lead-free optical glass with a refractive index (nd) of 1.62 to 1.72 and an Abbe number (vd) of 38 to 53 optical constants contains Nb 2 o 5 、 Ta 2 o 5 、 Bi 2 o 3 、GeO 2 Such expensive components lead to higher glass prices, and also contain PbO, As 2 o 3 , CdO and other environmental pollutants, some also contain Li 2 O and the more expensive ZrO 2 composition, which will not only make the glass easy to devitrify, but also increase the cost of the glass

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