Method for growing strontium iodide scintillating crystals by nonvacuum Bridgman method

• Main Authors: SHU KANGYING, QIN LAISHUN, SHI HONGSHENG
• Format: Patent
• Language: Chinese; English
• Published: 15.08.2012
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; CHEMISTRY; CRYSTAL GROWTH; 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 relates to a method for growing strontium iodide scintillating crystals by a nonvacuum crucible descent method, which is characterized by comprising the following steps: selecting one or the mixture of more than one of strong-reduction-property high-purity material carbon powder, silica powder, boron powder or sulphur powder with strong reduction property; doping the above materialsinto the growth raw materials, namely strontium iodide and europium iodide crystal to serve as deoxidant; evenly mixing the raw materials and the deoxidant; placing the mixed raw materials into a crucible, so as to acquire the europium ion-doped strontium iodide scintillating crystal with high optical quality by the crucible descent method. The technique is simple to operate, and is suitable for batch production. The europium ion-doped strontium iodide scintillating crystal manufactured by the invention is suitable for being used in scintillating detection materials in the fields of safety inspection equipment, nuclea