A kind of photoexcitation-free temperature sensing material, preparation method and temperature sensing method
A technology of sensing materials and sensing methods, which is applied in the field of temperature sensing materials, can solve the problems of complex overall structure of sensing devices, limitation of temperature sensing methods, and influence of sensing sensitivity, and achieve low equipment requirements, simplified structure, and improved The effect of sensitivity
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[0043] A preparation method of the above-mentioned photoexcitation-free temperature sensing material, comprising the following steps:
[0044] S1, take the compound raw materials of Sr, M, Zn, Tb and Eu, weigh each raw material according to the stoichiometric ratio of each element, and add co-solvent Li 2 CO 3 , grind evenly to obtain mixed raw materials;
[0045] S2, heating the mixed raw materials to 800-1200° C. under a protective atmosphere or vacuum, keeping the temperature for 10-48 hours, cooling to room temperature, grinding and pulverizing to obtain the photoexcitation-free temperature sensing material. The reaction temperature and reaction time are very critical. If the temperature deviates from this range, the target pure phase cannot be obtained. The incubation time is too short to obtain a pure phase. If the holding time is too long, the target phase will decompose.
[0046] As a further improvement, the raw materials of Sr and M compounds are selected from t...
Embodiment 1
[0052] Select strontium carbonate, zinc sulfide, europium oxide and terbium carbonate as raw materials, take the raw materials according to the molar ratio of each element (specifically as shown in Table 1), put the above raw materials into an agate mortar, add 1% of the total mass of the raw materials Co-solvent Li 2 CO 3 , after grinding and mixing evenly, take an appropriate amount of sample and put it into the corundum crucible, then put the crucible into the corundum boat, push the corundum boat into the tube furnace, and raise the temperature to 1050°C under the protective atmosphere of pure argon. Keep warm for 8 hours, and cool naturally with the furnace. The cooled samples were ground for 20 minutes to obtain materials with stress and temperature sensing functions.
Embodiment 2
[0054] Composite films were prepared by blade rack coating method. Adding Sr to PMMA colloidal solution 0.97 ZnSO:Tb 0.02 , Eu 0.01 Powder (#3), mix well to form a slurry. A transparent flexible PVC film (50mm 50mm 2mm) was used as a substrate to carry the composite film. Glue four layers of scotch tape (total thickness 0.18mm) along both edges of the PVC substrate. Pour the mixed composite slurry on the substrate, scrape it along the scotch tape with a blade, and then cure it in air at 60°C for 10 hours to form a composite film.
[0055] The sample (#1, #2, #3) ratio of table 1 embodiment 1 and the composite film (#4) composition of embodiment 2
[0056]
[0057] figure 1 Prepare the X-ray diffraction figure of sample for embodiment 1, spectral line adopts Bruker d8-advance bruker X-ray diffractometer to measure, test voltage 40kv, test current 40mA, select Cu-Kα ray for use, wavelength is X-ray diffraction analysis shows that the pure phase of SrZnSO can be obtain...
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