A high-sensitivity phosphor material for temperature sensing and its preparation method

Abstract

The invention provides a high-sensitivity phosphor powder material for temperature sensing. The high-sensitivity phosphor powder material has a molecular formula of Y4.67(1-x-y)Yb4.67xHo4.67ySi3O13, wherein 9%<=x<=11%, and 0.9%<=y<=1.2%; in addition, the invention also provides a preparation method of the high-sensitivity phosphor powder material for temperature sensing, and the preparation methodcomprises the following steps: (1), weighing initial raw materials of Y2O3, SiO2, Yb2O3 and Ho2O3 and a fusing assistant Li2CO3 in an agate crucible accurately, adding anhydrous ethanol, performing grinding, and performing even mixing; and (2), placing the ground mixture in an alundum crucible of 5 ml, performing calcination in a heating furnace, taking the crucible out after completion of calcination and cooling of the heating furnace are conducted, and performing grinding to obtain the powdery product which is the phosphor powder material.

Description

technical field [0001] The invention relates to a high-sensitivity phosphor material for temperature sensing and a preparation method thereof, belonging to the technical field of material preparation. Background technique [0002] Temperature, as one of the most important physical quantities, is a parameter that must be accurately measured in many fields such as science, industry, and military affairs. Various temperature sensors are also widely used in daily life, metrology, gas mechanics, atmosphere and maritime affairs, as well as fields such as chemistry, medicine, biology and military technology. With the rapid development of fields such as energy, information and biomedicine, higher and more complex requirements are put forward for the speed and accuracy of temperature detection, such as temperature measurement at submicron or even nanometer scale, temperature detection of cells in living organisms, etc. Traditional temperature detection and sensing materials work bas...

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Problems solved by technology

[0003] Up-conversion luminescent material is a luminescent material that can convert near-infrared light into visible light, usually including activator, sensitizer and matrix, Er 3+ 、Tm 3+ Plasma has abundant energy levels, and some energy levels have a long lifetime. It is the activator of up-conversion materials that have been studied more at present. Er 3+ 、Tm 3+ Up-conversion materials with ions as activators usually use ytterbium ions Yb 3+ As a sensitizer, for the matrix in the up-conversion material, the phosphor with high-efficiency luminescence generally uses fluoride with low phonon energy as the matrix, such as NaYF 4 , is currently the host material with the highest up-conversion luminous efficiency, doped with Yb 3+ -Er 3+ Synthesize up-conversion luminescent materials after various ion pairs, such as NaYF 4 :Er 3+ -Yb 3+ ; but the physical and chemical properties of fluoride itself are very unstable, and it is very sensitive to the surface contact with oxygen, which is easily polluted and deteriorated to affect the subsequent luminous performance; in addition, the fluorine source used in the preparation process of fluoride materials has a strong Corrosive and volatile, easy to cause environmental pollution

[0004] Compared with fluoride, the oxide matrix material has high physical and chemical stability, the production process is simple, easy to synthesize, and no pollutants are produced during the preparation process, such as SrWO 4 、BaMoO 4 etc., but the currently developed luminescent materials, such as BaMoO 4 :Er 3+ -Yb 3 、SrWO 4 :Er 3+ -Yb 3+ etc., the temperature detection sensitivity is compared to NaYF 4 :Er 3+ -Yb 3+ Lower, and the material emits less color

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