Special rare earth composite phosphor for three-band plant growth lamp and preparation method thereof

Abstract

The invention relates to a special rare earth composite phosphor for a three-band plant growth lamp and a preparation method thereof. The rare earth composite phosphor comprises a base material with an activator including, by weight, 10-30 parts of strontium hydrogen phosphate, 10-25 parts of magnesium oxide, 10-30 parts of alumina, 3-18 parts of germanium oxide, 5-15 parts of europia, 5-18 parts of cerium oxide, 15-20 parts of terbium oxide, with the sum of the components being 100%, and also comprises a cosolvent aluminium fluoride and a special gas. Wherein, the additive amount of aluminium fluoride accounts for 3-20% of the gross weight of the base material, and the special gas includes 7% of hydrogen, 1% of helium and 92% of nitrogen. According to the invention, a light source made with the special rare earth composite phosphor for a ZW-2 three-band plant growth lamp has three-band spectrums, containing a suitable visible spectrum which is high in radiation energy and contributes to the growth and development of plants and ultraviolet light which inhibits excessive growth and promote the formation of anthocyanidin and various pigments, thus enjoying an absolute advantage in light supplement for plants.

Description

technical field [0001] The invention relates to a special rare earth composite fluorescent powder for a ZW-2 three-band plant growth lamp and a preparation method thereof. Background technique [0002] Everything grows by the sun, without sunlight there is no life. The normal growth and development, flowering and fruiting of plants are all accomplished through photosynthesis, photomorphogenesis, and photoperiod regulation. We know that solar radiation is composed of light waves of different wavelengths. The solar radiation reaching the ground includes three parts: ultraviolet rays, visible light and infrared rays. Scientific experiments have proved that different wavelengths of light have different effects on plant growth. [0003] 1. Visible light: the wavelength ranges from 400nm to 750nm, including red, orange, yellow, green, cyan, blue and purple light. Among visible light, red-orange light (wavelength 600-700nm) and blue-violet light (wavelength 400-500nm) are absorbe...

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Problems solved by technology

But so far, most foreign countries use high-pressure sodium lamps and LEDs to "light" plants. The former consumes high energy, the product price is high, and the photosynthesis efficiency is low; the latter is prone to problems such as spectral red shift and light decay due to techn

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