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Cr<3+>-activated alumina glass-ceramic for agricultural greenhouse and its preparation method and use

A technology of glass-ceramics and alumina, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of organic film pollution and waste, and achieve the effect of solving pollution and waste

Active Publication Date: 2013-10-02
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are non-negligible pollution and waste in organic thin films.

Method used

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  • Cr&lt;3+&gt;-activated alumina glass-ceramic for agricultural greenhouse and its preparation method and use
  • Cr&lt;3+&gt;-activated alumina glass-ceramic for agricultural greenhouse and its preparation method and use
  • Cr&lt;3+&gt;-activated alumina glass-ceramic for agricultural greenhouse and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1- Embodiment 7

[0022] Will Al 2 o 3 with Cr 2 o 3 Mix according to the proportions shown in Table 1, put them into a high-temperature furnace and burn them at 1600°C for 2 hours, at 1650°C for 0.5 hours, and cool naturally to obtain a pink powder mixture.

Embodiment 8- Embodiment 14

[0024] (2) Press TeO 2 : Na 2 CO 3 :ZnO:BaCO 3 =7:1:1:1 (molar ratio) Measure each component as the glass-forming matrix, and the glass-forming matrix and the pink powder mixture (embodiment 4) prepared in step (1) are uniform in proportion as described in Table 2 Mix, melt in a high-temperature furnace at 650°C for 2 hours, and anneal at 400°C for 2 hours to obtain Cr 3+ Activated alumina glass-ceramics. The resulting glass sheet is then polished on both sides.

[0025] Table 1

[0026]

[0027]

[0028] Table 2

[0029]

[0030] Choose the Al made in embodiment 4 2 o 3 with Cr 2 o 3 mixture, testing its excitation and emission spectra, such as figure 1 shown. Wherein, the solid line is the excitation spectrum of light with a wavelength of 696nm, and the dotted line is the emission spectrum of light with a wavelength of 400nm. From figure 1 It can be seen that the Al prepared by the present invention 2 o 3 with Cr 2 o 3 The mixture has broadband abs...

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Abstract

The invention discloses a Cr<3+>-activated alumina glass-ceramic for an agricultural greenhouse and its preparation method and use. The Cr<3+>-activated alumina glass-ceramic is obtained by doping 1-10wt% of a mixture of Al2O3 and Cr2O3 in a low-melting point glass material, wherein the mixture of Al2O3 and Cr2O3 comprises 0.1-1mol% of Cr2O3. The Cr<3+>-activated alumina glass-ceramic can realize selective absorption and permeation of light. The Cr<3+>-activated alumina glass-ceramic can be used for the agricultural greenhouse, has a long service life, solves the problem that a film-type light replacement product produces pollution and waste, and is in accordance with development tendency of a light conversion material for plant growth.

Description

[0001] Field [0002] The invention belongs to the field of down-conversion luminescent materials, specifically Cr 3+ Activated alumina glass-ceramics, preparation and applications. Background technique [0003] Solar energy is an inexhaustible source of energy. Studies have shown that different wavelengths of sunlight have different effects on plant growth and development. The energy of sunlight reaching the surface of the earth is mainly concentrated in the spectral range from 290nm to 3000nm. Among them, the ultraviolet light with a wavelength of 290-400nm promotes the aging of branches and the reproduction of germs, which has adverse effects on the growth of plants; the yellow-green light with a wavelength of 500-600nm is harmless to plants; the blue light with a wavelength of 400-500nm and the wavelength of The red light of 600-700nm can promote the photosynthesis of plants, and the blue light is beneficial to the growth of plant vegetative organs (such as stems, leave...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03C4/00C09K11/64
Inventor 杨艳民张伟李刚焦福运李志强杨志平
Owner HEBEI UNIVERSITY
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