Preparation method of high-purity magnesium fluoride crystal material

• Main Author: HOU MINBO
• Format: Patent
• Language: Chinese; English
• Published: 06.09.2022
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; CRYSTAL GROWTH; INORGANIC CHEMISTRY; METALLURGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

The invention discloses a preparation method of a high-purity magnesium fluoride crystal material, which comprises the following steps: calcining magnesite powder at high temperature to obtain light calcined ore powder, heating with an ammonium chloride solution with the mass concentration of 15-20% to obtain a leaching solution containing magnesium and calcium ions, uniformly mixing the leaching solution with a surfactant, precipitating with ammonia water, and drying to obtain the high-purity magnesium fluoride crystal material. And treating the obtained filter residue with an ammonium chloride solution with the mass concentration of 5-8% to remove calcium ions, carrying out high-temperature calcination to obtain powder, uniformly mixing the powder with a proper amount of water, and then adding hydrofluoric acid to react to obtain the high-purity magnesium fluoride crystal material. The preparation process is simple, and the prepared magnesium fluoride crystal material has high purity and can meet the perfor