Material with reversible thermo-optic modulation characteristics and preparation method thereof
A technology of thermo-optic modulation and characteristics, applied in the directions of luminescent materials, color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of high material cost, difficult to obtain, easy to fatigue, etc., and achieve low price, good reversibility, and synthetic steps. simple effect
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Embodiment 1
[0026] A preparation method of a material with reversible thermo-optic modulation properties:
[0027] Step 1) preparation of raw material, raw material Na 2 CO 3 (99.8%), Li 2 CO 3 (97%), Bi 2 o 3 (99%), TiO 2 (99%) and Ba 2 CO 3 (99%) were dried in an oven at 120°C for 6 hours;
[0028] Step 2) the calcining of material, according to chemical formula 0.993 (Bi 0.5 Na 0.5 TiO 3 -BaTiO 3 )-0.007LiBiO 3, the mass fraction of required various elements weighs the raw material and puts it into a ball mill bottle, takes absolute ethanol as the medium ball mill for 24 hours, and then drys it, and pre-burns it for 6 hours at 800° C. to obtain a pre-calcined product;
[0029] Step 3) Sintering of materials with reversible thermo-optic modulation properties. The calcined product obtained in step 2 is ball-milled for 24 hours with absolute ethanol as the medium, dried and passed through a 100-mesh sieve, and then pressed under a pressure of 100 MPa Form a round blank with ...
Embodiment 2
[0037] A preparation method of a material with reversible thermo-optic modulation properties:
[0038] The steps not specified in particular are the same as the preparation method of Example 1, except that the required component mass fraction of the step 2) satisfies the chemical formula 0.999[Bi 0.5 Na 0.5 TiO 3 -BaTiO 3 ]-0.001 LiBiO 3 .
[0039] 0.001 LiBiO 3 The test method for the transmittance and absorbance performance of the doped material with reversible thermo-optic modulation properties is the same as that of Example 1.
[0040] The performance test result is: In order to prove that 0.999(Bi 0.5 Na 0.5 TiO 3 -BaTiO 3 )-0.001LiBiO 3 Preparation is successful, XRD test is carried out to the sample prepared in embodiment 2, test result is as follows Figure 4 As shown, 0.999(Bi 0.5 Na 0.5 TiO 3 -BaTiO 3 )-0.001LiBiO 3 Prepared successfully.
[0041] After the sample prepared in Example 2 was irradiated with visible light for 10 seconds, it quickly chan...
Embodiment 3
[0046] A preparation method of a material with reversible thermo-optic modulation properties:
[0047] The steps not specifically described are the same as the preparation method of Example 2, except that: the step 3) sintering with heat preservation for 25 hours, to prepare a material with reversible thermo-optic modulation properties.
[0048] 0.001 LiBiO 3 The method for testing the fluorescence spectrum of the doped material with reversible thermo-optic modulation properties is different from that of Example 1, and can be obtained by detection with a fluorescence spectrometer.
[0049] The performance test result is: In order to prove that 0.999(Bi 0.5 Na 0.5 TiO 3 -BaTiO 3 )-0.001LiBiO 3 Excitation and emission situation, the sample prepared in embodiment 3 is carried out fluorescence spectrum test, test result is as follows Image 6 shown. In the excitation spectrum detected by the 350nm laser, six obvious excitation bands can be observed, among which the intensit...
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