A kind of preparation method of phosphate optical glass and phosphate optical glass obtained according to the method

Abstract

The invention provides a preparation method of phosphate optical glass and phosphate optical glass obtained by the method. The main steps of the preparation method are: a. Provide A component, wherein A component is calculated as oxides, containing: P2O5: 40-55%, BaO: 30-45%, CaO: 8-18%, MgO: 0~10%; Among them, A component does not contain B2O3; b. Provide B component, wherein B component is calculated as oxide, containing: B2O3: 60~85%, Al2O3: 15~30%, ZrO2: 0 ~10%; the above percentages are all percentages by weight; c. Make clinker C from component A; d. Mix the above clinker C and component B to make batch D; e. Melt batch D For phosphate optical glass. The above preparation method can make the preparation process of B2O3-RO-P2O5-Al2O3 system glass controlled.

Description

Technical field [0001] The invention relates to a preparation method of phosphate optical glass and a phosphate optical glass obtained according to the method, belonging to the technical field of glass preparation. Background technique [0002] The melting of optical glass is to first weigh the raw materials according to the composition ratio of the raw materials, then mix the raw materials that meet the glass composition uniformly to form a batch, and then put the qualified batch into the furnace for melting, high-temperature clarification and homogenization. To eliminate bubbles and streaks, obtain the required optical glass. [0003] B 2 O 3 -RO-P 2 O 5 -Al 2 O 3 System Phosphate optical glass, where RO refers to oxides such as BaO or / and CaO or / and MgO provided in the form of carbonate or / and nitrate, and there are many inconveniences in the preparation process. During the production of batch materials, due to P 2 O 5 Exposure to air has strong water absorption, and the proces...

AI Technical Summary

Problems solved by technology

[0003] B 2 o 3 -RO-P 2 o 5 -Al 2 o 3 System phosphate optical glass, where RO refers to oxides such as BaO or / and CaO or / and MgO provided in the form of carbonate or / and nitrate, there are many inconveniences in the preparation process

During the production of batch materials, due to P 2 o 5 It has strong water absorption when exposed to air, and the process releases a lot of heat, which induces H 3 BO 3 Or / and boric anhydride and RO nitrate or / and carbonate have violent physical and chemical reactions during the preparation or / and storage of the batch, which brings inconvenience to the preparation, storage and transportation of the batch

At the same time, after the batch material is put into the melting pot during the smelting process, P 2 o 5 Thermal decomposition exothermic reaction, H 3 BO 3 The decomposition reaction of nitrate or / and carbonate of RO and the violent physical and chemical reaction between the raw materials occur simultaneously, resulting in the overflow of a large amount of reaction gas products, causing the surface of the feed liquid to vibrate during the feeding process, and making the feeding process difficult to control. Moreover, the gas content in the batch is high, which makes it difficult to eliminate the bubbles in the glass

[0004] Patent application CN1694848A discloses a method for preparing glass materials. It mixes degassed raw materials under melting conditions, heats them to the degassed temperature, melts them, degasses them and cools them, then mixes them with other non-degassed raw materials to form a glass batch. Preparation of glass materials containing silica, alumina, alkali metal and alkaline earth metal oxides and / or boron oxide in glass melting furnaces cannot be extended to the preparation of phosphate optical glasses

Images