Preparation method of amorphous BaF2

Abstract

The invention belongs to the technical field of material preparation and relates to a preparation method of amorphous BaF2. The preparation method comprises the following steps of preparing cubic fluorite-structure BaF2 nano-crystal grains as initial raw materials having crystal grain sizes of about 14nm by a solvothermal synthesis method, applying pressure to the material by a diamond opposite-pressing anvil press until the highest pressure is 30GPa so that the cubic fluorite structure of the sample is transformed into an amorphous structure, and releasing the pressure in the diamond opposite-pressing anvil press until the pressure is equal to ordinary pressure so that the amorphous structure of the BaF2 sample is still retained under the ordinary pressure. The initial raw materials have the advantages of simple processes, small crystal grain size, uniform morphology and narrow particle size distribution. The product obtained by high-pressure synthesis has a stable amorphous structure under the ordinary pressure and has high phase purity. The BaF2 material has good optical performances. The novel synthetic material has large application potential in fields of optics and biology.

Description

technical field [0001] The invention belongs to the technical field of material preparation, in particular to an amorphous structure BaF 2 method of preparation. Background technique [0002] BaF 2 It is an important member of alkaline earth metal fluorides and has excellent optical properties. In particular, it is a flash component with an average decay time of less than 1 ns, and is the fastest known inorganic scintillator so far. BaF 2 The scintillation properties of the BaF 2 It has become an ideal high-density luminescent material and is widely used in gamma-ray and elementary particle detectors [1, 2]. In addition, BaF 2 With good ionic conductivity, it has become an important candidate material for high-temperature batteries, fuel cells, chemical filters and sensors [3]. Due to its wide application potential, BaF 2 Has been a hot research material, especially BaF with new crystal structure 2 The synthesis of materials has become a new challenge in the field o...

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Problems solved by technology

However, so far only BaF 2 The three crystal structures of BaF without using various phys

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