Phosphor powder capable of promoting plant growth and preparation method thereof

A technology for promoting plant growth and phosphor powder, applied in the fields of botanical equipment and methods, plant growth regulators, plant growth regulators, etc. problem, to achieve the effect of improving the utilization rate of light energy, low price and reducing cost

Active Publication Date: 2020-05-05
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the spectral curve of LED plant lights currently on the market is quite different from the spectral curve absorbed by plant photosynthesis, and the energy utilization rate of the light source is not high, which is not suitable for plant growth; electricity, which indirectly increases the cost of planting and is difficult to promote on a large scale

Method used

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  • Phosphor powder capable of promoting plant growth and preparation method thereof
  • Phosphor powder capable of promoting plant growth and preparation method thereof
  • Phosphor powder capable of promoting plant growth and preparation method thereof

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preparation example Construction

[0039] The present invention also provides a kind of preparation method of above-mentioned fluorescent powder, specifically carries out according to the following steps:

[0040] 1) Press Al (2-x) o 3 :xCr 3+(In the formula, 0.005≤x≤0.06) The stoichiometric ratio of each chemical composition in the chemical expression weighs the first aluminum compound and chromium compound respectively, and mixes and grinds the first aluminum compound and chromium compound to micron level to obtain the first a powder;

[0041] The first aluminum compound is aluminum oxide (Al 2 o 3 ), aluminum-containing hydroxides, aluminum-containing nitrates, aluminum-containing sulfates or aluminum-containing phosphates, etc.

[0042] Chromium compound adopts chromium oxide (Cr 2 o 3 ), chromium-containing hydroxide, chromium-containing nitrate, chromium-containing carbonate, chromium-containing sulfate or chromium-containing phosphate, etc.

[0043] 2) Place the first powder prepared in step 1) i...

Embodiment 1

[0054] Press Al 1.98 o 3 :0.02Cr 3+ The stoichiometric ratio shown in the molecular formula, weigh 1.9698g of Al 2 o 3 and 0.0297g of Cr 2 o 3 , will weigh the Al 2 o 3 and Cr 2 o 3 After grinding and mixing evenly, put it into an alumina crucible, place it in an environment with a temperature of 1450°C and calcinate it under a nitrogen atmosphere for 4 hours, and cool it to room temperature with the furnace to obtain a calcined product; after grinding, a powder is obtained. The XRD pattern of the powder is as follows figure 1 As shown, the peak shape and peak position in the figure correspond to the PDF card one by one. On this basis, through structure refinement, it is proved that the phase of the prepared powder is Al 2 o 3 Simplex.

[0055] Excitation and emission spectra of the prepared powders, such as figure 2 As shown, the excitation spectrum shows that there are two broad peaks, the peaks are located at 400nm and 550nm respectively, and the emission spec...

Embodiment 2

[0057] press Y 2.94 Al 5 o 12 :0.06Ce 3+ For the stoichiometric ratio shown in the molecular formula, weigh 1.1117g of Y 2 o 3 , 0.0346g of CeO 2 and 0.8535g of Al 2 o 3 , and then weighed 0.1gH 3 BO 3 (5wt%) as a co-solvent, mixed and ground the weighed materials evenly, put them into an alumina crucible, and calcined for 4 hours in a reducing atmosphere at a temperature of 1480 ° C. The reducing atmosphere was composed of 95% by volume nitrogen and 5 % hydrogen composition, the calcined powder is cooled to room temperature with the furnace to obtain the calcined product; after grinding, the powder is obtained. The XRD spectrum of the powder is as follows image 3 shown, from image 3 It can be seen that the peaks of the powder correspond to the PDF card one by one, and there are no miscellaneous peaks. On this basis, the structure is refined, which proves that the phase of the powder is YAG:Ce 3+ Simplex. Figure 4 For the YAG that embodiment 2 makes: Ce 3+ The...

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Abstract

The invention discloses fluorescent powder capable of promoting plant growth and a preparation method thereof. The fluorescent powder is prepared from Ce-doped oxide powder and Al2O3:Cr3+ powder whichare mixed, wherein the Ce-doped oxide powder has a garnet structure. The preparation method comprises the steps: a first aluminum compound and a chromium compound are weighed, and mixed and ground tothe micron grade, and first powder is obtained; the first powder is calcined at the high temperature, cooled and ground, and the Al2O3:Cr3+ powder is obtained; a second aluminum compound, a yttrium compound and a cerium compound are weighed, mixed, ground, calcined at the high temperature under the reducing atmosphere, cooled and ground, and YAG:Ce3+ powder is obtained; and the YAG:Ce3+ powder and the Al2O3:Cr3+ powder are mixed according to the mass ratio of 1:(1 to 20), and ground, and the fluorescent powder capable of promoting plant growth is prepared. The fluorescent powder can emit redlight beneficial to plant growth, the utilization rate of light energy can be increased, plant growth can be promoted, the cost is low, the efficiency is high, and electric energy is not consumed.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and relates to a fluorescent powder for plant growth and a preparation method thereof, in particular to a preparation method of a fluorescent powder which can emit red light after being irradiated with ultraviolet light or visible light. Background technique [0002] Plants synthesize carbohydrates through photosynthesis as the basic nutrients for their growth, so light is one of the foundations for plant growth and development. Studies have shown that chlorophyll in plants mainly absorbs blue-violet light with a wavelength of 380-500nm and red-orange light with a wavelength of 610-720nm. At this time, the photosynthesis efficiency is the highest, and light in other bands of sunlight is rarely absorbed, contributing to photosynthesis. rare. Therefore, in fact, the utilization rate of solar radiation energy by plants is very low, so trying to improve the utilization rate of light en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/06A01N59/16A01G7/06A01P21/00
Inventor 王育华濑户孝俊王琳
Owner LANZHOU UNIVERSITY
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