Preparation method of repeatable memory type stress film based on stress luminescent material

Abstract

The invention relates to a preparation method of a repeatable memory type stress film based on a stress luminescent material, and belongs to the technical field of stress luminescent materials. The preparation method comprises the following steps: grinding and uniformly mixing high-purity CaCO3, Ga2O3, Bi2O3 and Tm2O3 to obtain mixed powder A; placing the mixed powder A at the temperature of 1200-1250 DEG C, performing high-temperature sintering for 10-12 hours in an oxidizing atmosphere, and grinding to obtain CaGa2O4: Bi < 3 + >, Tm < 3 + > stress luminescent powder; then uniformly mixing CaGa2O4: Bi < 3 + >, Tm < 3 + > stress luminescent powder with PMMA colloid to obtain mixed liquid, putting the mixed liquid into a mold, coating the mixed liquid with a preservative film, and heating and curing the colloid in the mold to obtain the repeatable memory type stress film. The repeatable memory type stress film disclosed by the invention has relatively high stress luminous intensity, can keep the original stress luminous intensity in a long-term repeated use process, and can record the trace of each time of force application in real time; the stress film has the characteristics of high stress luminescence brightness, high stability, high sensitivity, repeatability and the like.

Description

technical field [0001] The invention relates to a method for preparing a repeatable memory stress film based on a stress luminescent material, and belongs to the technical field of stress luminescent materials. Background technique [0002] Stress-luminescent materials are characterized by mechanically stimulated photons, which are crucial for applications in medical health diagnosis, biomechanical sensing, flaw detection of building structures, and activation of light sources. At present, the application of the discovered stress luminescence material (CaAl 2 Si 2 O 8 :Eu 2+ , CaNb 2 O 7 :Pr 3+ etc.) have the following disadvantages: (1) the efficiency of converting the applied mechanical stimulus into light energy is low, and cannot effectively produce stress luminescence with high brightness, which greatly limits its accuracy in analyzing force applications; (2) After the stress luminescent material and colloid are mixed and packaged, the optical properties such as ...

AI Technical Summary

Problems solved by technology

At present, the application of the discovered stress luminescence material (CaAl 2 Si 2 o 8 :Eu 2+ , CaNb 2 o 7 :Pr 3+ etc.) have the following disadvantages: (1) the efficiency of converting the applied mechanical stimulus into light energy is low, and cannot effectively produce stress luminescence with high brightness, which greatly limits its accuracy in analyzing force applications; (2) After the stress luminescent material and colloid are mixed and packaged, the optical properties such as stress luminescence are seriously reduced, which has become a bottleneck in the field of coating film formation; (3) Since most of the traditional stress luminescent materials are fractal luminescent materials, stress luminescence is composed of Breakage of atomic and chemical bonds results in poor reproducibility and limits application potential

[0003] Therefore, there is an urgent need for a stable high-brightness, high-sensitivity, repeatable memory stress film to solve the problems of low brightness, uneven dispersion of powder in the colloid after packaging, and poor repeatability in traditional stress-luminescent materials.

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