Preparation method for colorless glass-state electronic-grade magnesium metaphosphate

Abstract

The present invention discloses a preparation method for colorless glass-state electronic-grade magnesium metaphosphate. The method comprises the following steps: adding phosphoric acid, water and magnesium carbonate to a reactor; heating the reactor to a temperature of 130-150 DEG C after completing the reaction, then carrying out boiling and evaporation for 3-5 hours until the crystal is generated; removing the crystal from the reactor; carrying out quenching, then carrying out treatments of dilution and settling separation; loading the prepared magnesium dihydrogen phosphate into a box prepared from a magnesium alloy, and heating the box to the temperature less than 650 DEG C; transferring the box to a sealed electric furnace after heating, carrying out the treatment of air exhaust for the electric furnace until the pressure in the electric furnace is the negative pressure, maintaining the constant temperature and carrying out sintering for 4-6 hours; removing the sintered magnesium metaphosphate from the electric furnace and cooling. According to the present invention, the specially-prepared magnesium carbonate is adopted as the raw material; the special magnesium alloy box is adopted for loading the magnesium dihydrogen phosphate; the preparation has the following characteristics that: the operation steps are simple and clear, the industrial process operation has high stability and high safety, the produced magnesium metaphosphate has high purity, the production cost is low, bulk production can be realized, and the like.

Description

technical field [0001] The invention relates to a preparation method of colorless glassy electronic grade magnesium metaphosphate. Background technique [0002] A national defense factory in my country proposed to produce fluorophosphate optical glass ten years ago, because it combines the advantages of fluoride glass and phosphate glass, has a wide range of applications, has low dispersion and good infrared and ultraviolet transmittance, It has a wide range of uses in optical devices, and is more suitable as a gain medium material for high-energy lasers; through combined adjustments, excellent chemical and mechanical properties can be obtained while maintaining its low phonon energy characteristics, and can also be used as a conversion Luminescent materials have many advantages and special uses. [0003] Magnesium metaphosphate is an important raw material for producing fluorophosphate optical glass, and the purity of magnesium metaphosphate directly affects the quality of f...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies of the existing methods for preparing magnesium metaphosphate, to provide a novel preparation method for colorless glassy electronic grade magnesium metaphosphate, to overcome the tedious operation steps of the traditional preparation method, the poor safety of industrial process operation, and the production The purity of the magnesium metaphosphate that comes out is not high enough, the production cost is high and it is difficult to achieve batch production and other shortcomings