Method for coating surface of strontium aluminate long persistence luminescent powder
A surface coating, luminescent powder technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of weakening light absorption and emission, difficult to control, cumbersome process, etc., to achieve high industrial application value, easy operation and control, Solve the effect of easy hydrolysis
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0030] The first step: mixing 2g of strontium aluminate long-lasting luminescent powder with 20g of absolute ethanol and fully stirring to obtain a suspension mixture of strontium aluminate long-lasting luminescent powder and absolute ethanol.
[0031] The second step: continue to stir the mixture at 20°C, while adding 0.24 g of concentrated phosphoric acid solution dropwise at 0.01 ml / s, and continue stirring for 2 hours after the addition is complete.
[0032] The third step: The mixture obtained in the second step is allowed to stand at 20°C for 24 hours, and then centrifuged to remove the reaction residue, and then washed with anhydrous ethanol 3 times, and finally put into a 70°C automatic temperature control electric heating constant temperature blast drying Dry in the box for 6 hours to obtain the strontium aluminate long afterglow luminescent powder coated on the surface.
Embodiment 2
[0034] The first step: Mix 2g of strontium aluminate long-lasting luminescent powder with 40g of absolute ethanol and fully stir to obtain a suspension mixture of strontium aluminate long-lasting luminescent powder and absolute ethanol;
[0035] Step 2: At 25°C, continue to stir the mixture while adding 0.47g concentrated phosphoric acid solution dropwise at 0.025ml / s, and continue stirring for 4 hours after the dropwise addition is complete;
[0036] The third step: The mixture is allowed to stand at 25°C for 24 hours, then centrifuged to remove the reaction residue, and then washed with absolute ethanol 3 times, and finally placed in an electric thermostatic constant temperature blast drying oven at 80°C. After drying for 8 hours, the surface-coated strontium aluminate long afterglow luminescent powder is obtained.
[0037] The emission spectra of the obtained strontium aluminate long afterglow luminescent powder (sample 3) after surface coating and the strontium aluminate long aft...
Embodiment 3
[0040] The first step: Mix 2g of strontium aluminate long-lasting luminescent powder with 40g of absolute ethanol and fully stir to obtain a suspension mixture of strontium aluminate long-lasting luminescent powder and absolute ethanol;
[0041] Step 2: At 25°C, continue to stir the mixture while adding 0.47g of concentrated phosphoric acid solution dropwise at 0.03ml / s, and continue stirring for 4 hours after the addition is complete;
[0042] The third step: Put the mixture into a low temperature reaction kettle lined with polytetrafluoroethylene, seal, and place the reaction kettle in an automatic constant temperature electric constant temperature blast drying oven at 100°C for 24 hours, and then centrifuge to remove The reaction residue was washed 3 times with absolute ethanol, and finally placed in an electric thermostatic blast drying oven with automatic temperature control at 80° C. and dried for 8 hours to obtain the surface-coated strontium aluminate long-lasting luminescen...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More