Scintillation crystals areNuclear medicine imaging, nuclear physics detection, space physics detection, safety inspection, geological exploration and industrial production fieldsIt has a wide range of uses. Bismuth germanate (BGO) is an important scintillation crystal that is widely used in positron emission tomography (PET) and high-precision electromagnetic energy meters. However, the disadvantage of BGO crystal is that it has a long decay time, and the raw material GeO₂It's expensive. BSO crystal has the same structure and similar properties as bismuth germanate (BGO) crystal. BSO crystal has a faster decay time than BGO crystal, and has the advantages of low raw material cost, good mechanical properties and high chemical stability. It is a scintillation crystal material with excellent performance. It is the first in the world to solve the problems of composition segregation and metastable region growth in the growth process of BSO crystals. Through double substitution of Si and Bi sites of bismuth silicate scintillation crystals, research on luminescence mechanism, screening of doped ions and composition optimization, crystallization behavior control, and obtain a BSO scintillation crystal with high light yield and fast decay. Using multi-crucible growth technology with independent intellectual property rights, large-scale production of large size and high-quality BSO crystals has been realized, and small-batch supply to foreign buyers has been realized. The BSO crystal has grown to 3 inches. We have 3 invention patents for this series of crystals. Compared with commonly used scintillation materials such as lead tungstate crystals and BGO crystals, BSO crystals have low cost and excellent performance. They can be widely used in nuclear medicine imaging, safety inspection and other fields. They are a new type of scintillation material with independent intellectual property rights. The research and development and application of BSO crystals are of great significance to maintaining my country's leading position in the field of scintillation crystals.

Won the second prize in the 2012 Zhejiang Province Natural Science and Technology Award.

It has obtained 2 invention patents authorized by the state and applied for 3 invention patents.

1. Obtained 2 invention patents authorized by the state:

CN201710112231.5 A high-light output bismuth silicate scintillation crystal and its preparation method;CN201410317866.5 A method for preparing bismuth silicate powder;

2. Currently applied for 3 invention patents:

CN201810018733.6 An intrinsic luminescent scintillation crystal magnesium tantalate and its preparation method and use;

CN201810019067.8 Magnesium tantalate series crystals and preparation method thereof;

CN201810106289.3 Lead bromosilicate crystal and preparation method thereof;