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Fluorescent powder capable of promoting plant growth and preparation and application thereof

A technology for promoting plant growth and phosphors, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as difficulty in large-scale promotion, low energy utilization rate of light sources, and narrow spectral curves.

Active Publication Date: 2022-07-29
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, most of the cultivation of plants uses LED plant lights, but the spectral curve of many plant lights is narrow or does not meet 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; in addition , LED chips themselves are expensive and require electricity, which indirectly increases the cost of planting and is difficult to promote on a large scale

Method used

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  • Fluorescent powder capable of promoting plant growth and preparation and application thereof
  • Fluorescent powder capable of promoting plant growth and preparation and application thereof
  • Fluorescent powder capable of promoting plant growth and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Press Rb 0.2 K 1.8 CaPO 4 F: The stoichiometric ratio shown by the molecular formula of 0.02Eu, weigh 0.3464g of Rb 2 CO 3 , 0.8292g of K 2 CO 3 , 1.4850g of CaCO 3 , 1.7255g of NH 4 H 2 PO 4 , 0.9587g of KF and 0.02640g of Eu 2 O 3。 After fully grinding the weighed raw materials and mixing them evenly, put them into an alumina crucible, place them in a tube furnace, and feed them with 5% H by volume. 2 and 95% of N 2 In the reducing atmosphere formed, the temperature was raised to 850°C at a heating rate of 5°C / min, calcined for 4 hours, cooled to room temperature with the furnace, and the calcined product was ground to obtain a phosphor that can promote plant growth.

Embodiment 2

[0040] Press Rb 0.1 K 1.9 CaPO 4 F: The stoichiometric ratio shown by the chemical formula of 0.1Eu, take the Rb 2 CO 3 , K 2 CO 3 , CaCO 3 , NH 4 H 2 PO 4 , KF and Eu 2 O 3 . According to the method of Example 1, the phosphor powder capable of promoting plant growth was prepared.

Embodiment 3

[0042] Press Rb 0.01 K 1.99 CaPO 4 F: The stoichiometric ratio shown by the chemical formula of 0.01Eu, take Rb by weighing 2 CO 3 , K 2 CO 3 , CaCO 3 , NH 4 H 2 PO 4 , KF and Eu 2 O 3 . According to the method of Example 1, the phosphor powder capable of promoting plant growth was prepared.

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Abstract

The invention discloses fluorescent powder capable of promoting plant growth and preparation and application of the fluorescent powder, the fluorescent powder is formed by doping Eu < 2 + > in halogen phosphate containing Rb < + >, and the fluorescent powder has a Pnma crystal structure; the chemical formula of the fluorescent powder is RbyK < 2-y > CaPO4F: yEu < 2 + >. Weighing the raw materials according to the stoichiometric ratio of the chemical components in the chemical expression, grinding the raw materials to a micron level, and uniformly mixing the raw materials to obtain raw material powder; placing in an environment in which a reducing atmosphere is introduced, raising the temperature to 850 DEG C, and calcining; and naturally cooling to room temperature, and grinding to obtain the fluorescent powder capable of promoting plant growth. The fluorescent powder is formed by sintering through a high-temperature solid-phase method, emits red light beneficial to plant growth under the irradiation of an ultraviolet lamp or sunlight from ultraviolet to blue light, can improve the light energy utilization rate and promote plant growth, and is low in cost, free of pollution, high in efficiency and free of electric energy consumption.

Description

technical field [0001] The invention belongs to the technical field of solid luminescent materials, and relates to a red luminescent material, in particular to a fluorescent powder capable of promoting plant growth and emitting red light after being irradiated by an ultraviolet lamp or sunlight; the invention also relates to a preparation method of the fluorescent powder and applications. Background technique [0002] Plants synthesize carbohydrates through pigment photosynthesis as the basic nutrients for their growth. Plants need light to provide energy in the process of germination and fruit ripening. Therefore, the regulation of light is one of the important means to regulate plant growth. The study found that the absorption of light by plants is mainly carried out by chlorophyll and phytochrome, chlorophyll mainly blue (400nm ~ 500nm) and orange-red light (600nm ~ 700nm); phytochrome absorbs red light and deep red (650nm ~ 750nm) light in the region , corresponding to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/73
CPCC09K11/7737Y02P60/14A01G7/06C01B25/455C09K11/02A01G22/05C09K11/616C09K11/7739C01P2002/54C01P2002/72C01P2004/03C01P2006/60
Inventor 濑户孝俊王育华康自勇
Owner LANZHOU UNIVERSITY