Hafnate luminescent material and preparation method thereof

Abstract

The invention discloses a hafnate luminescent material which has the general formula of Y2-xHf7O17:Eux, wherein, X is 0.01-0.3; the invention also discloses a method for preparing the hafnate luminescent material, which comprises the steps: solid yttrium nitrate and hafnyl chloride are put into a container by taking the mol ratio of 3:25-3:10 as the mixture ratio and dissolved by distilled water; Eu(NO3)3 solution is added into the mixture, and the molar weight of Eu is 1%-30% of the molar weight of Y; the pH value of the solution is regulated to be 1 by using nitric acid; the blended fuel of glycin and urea is added into the solution, and ethylenediamine tetracetic acid (EDTA) having the mass accounting for millesimal of the total mass of the raw material is taken as chelating agent and added into the solution; the mixture is burnt in a furnace at the temperature of 450 DEG C to obtain precursor, and then sintered for 2 hours at 800 DEG C in a high temperature furnace, thereby obtaining the Y2-xHf7O17:Eux material. The material obtained by the invention can be used in an X-ray intensifying screen of high-energy physics, medical use or safety inspection. The preparing method has the advantages of safety, time-saving, energy-efficiency, etc.

Description

technical field [0001] The invention relates to the technical field of inorganic materials and their preparation, in particular to an inorganic hafnate light-emitting material that can be used as a scintillator for high-energy physics or X-ray sensitization for medical or security checks, and provides a preparation method thereof. Background technique [0002] Scintillation materials refer to materials that can absorb high-energy particles or rays and emit visible photons. Inorganic scintillation materials are widely used in the detection of ionizing radiation. Over the past few decades, scintillation materials have grown rapidly in the fields of high-energy physical calorimetry and medical imaging. The development of scintillators is divided into three stages. First, when Roentgen discovered X-rays with calcium tungstate, Becquerel discovered radioactivity with uranium phthalate, when Crooke studied Zns, and Rutherford discovered and calculated radioactivity when he studie...

AI Technical Summary

Problems solved by technology

However, the high-temperature solid-phase method also has certain disadvantages: this method needs to let the crystals grow slowly under high temperature for several hours, and the obtained products generally have larger grains and high hardness, and need to be ground by ball milling, so the crystal form will be destroyed. , the composition is not uniform, the luminous brightness is greatly reduced, in addition, the energy consumption is large, the preparation cycle is long, and it is difficult to avoid the second phase; the sol-gel method is to dissolve inorganic salts and metal alkoxides or other organic salts in water or A uniform solution is formed in an organic solvent. The solute and the solvent undergo hydrolysis, alcoholysis or integration reaction to form a sol, which is then transformed into a gel after evaporation and drying. The gel is dried and heat-treated to obtain the product

The disadvantage of the sol-gel method is that because of the use of metals, the cost is high, the production cycle is long, and there is no obvious improvement in the luminous performance

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