Light conversion film capable of promoting plant growth and preparation method thereof
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A technology that promotes plant growth and light conversion. It is applied in the field of agricultural light conversion materials. It can solve the problems that plants cannot provide strong red light, the energy utilization rate of light sources is not high, and the price of LED chips is high. It achieves wide coverage, low cost, and avoids Effects of yellowing and disintegration
Inactive Publication Date: 2020-11-03
GANSU YINIAN TRADING CO LTD
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However, LED plant lights have many disadvantages: the spectral curves of LED plant lights currently on the market are quite different from those absorbed by plant photosynthesis, the energy utilization rate of light sources is not high, the price of LED chips is high, and a large amount of power resources are consumed
In addition, this method of covering plants with a film cannot provide strong red light to the plants, because half of the red light emitted by the film is emitted outside the plants.
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[0035] press Y 1.97 BaAl 3.95 SiO 12 : 0.03Ce, stoichiometric ratio shown in 0.05Cr chemical formula, weigh 0.2224g of Y 2 o 3 , 0.1973g of BaCO 3 , 0.2015g of Al 2 o 3 , 0.0601g of SiO2 、0.0052g的CeO 2 和0.0038g的Cr 2 o 3 ,将称取的各原料充分研磨混合均匀后放入氧化铝坩埚,置于管式炉中,在温度为1450℃(体积百分比5%H 2 和95%N 2 气氛)下煅烧4小时(管式炉预热温度为200-300℃,原料放入管式炉之后的升温速度为5℃ / min),随炉冷却至室温,得煅烧物;研磨所得煅烧物,制得荧光粉1。荧光粉1的XRD图谱如 figure 1 所示,图中各峰峰形、峰位与PDF卡片一一对应,证明制得的粉末的物相为单相。
[0038] press Y 1.97 BaAl 3.95 SiO 12 : 0.03Ce, stoichiometric ratio shown in 0.05Cr chemical formula, weigh 0.2224g of Y 2 o 3 , 0.1973g of BaCO 3 , 0.2015g of Al 2 o 3 , 0.0601g of SiO 2 、0.0052g的CeO 2 和0.0038g的Cr 2 o 3 ,再加4wt%的AlF 3 为助熔剂,将称取的各原料充分研磨混合均匀后放入氧化铝坩埚,置于管式炉中,在温度为1450℃(5%H 2 和95%N 2 气氛)下煅烧4小时(管式炉预热温度为200-300℃,原料放入管式炉之后的升温速度为5℃ / min),随炉冷却至室温,得煅烧物;研磨所得煅烧物,制得荧光粉2。荧光粉2的XRD图谱(如 image 3 所示),图中各峰峰形、峰位与PDF卡片一一对应,证明制得的粉末的物相为单相,从荧光粉2的发射光谱与荧光粉1的发射光谱的对比(如 Figure 4 ),我们可以看出荧光粉的发光强度相对于荧光粉1提高了46.4%。
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Abstract
The invention discloses a light conversion film capable of promoting plant growth and a preparation method thereof, wherein the light conversion film comprises garnet fluorescent powder with the formula of Y(3-x)BaxAl(5-x)SixO12: mCe, nCr, 0 <= x <= 1, m > 0 and n > 0, and a polymer resin or glass with refractive index of 1.4-1.65, wherein the garnet fluorescent powder is uniformly dispersed in the polymer resin or glass. The preparation method comprises the following steps: (1) respectively weighing compound raw materials of yttrium, aluminum, barium, silicon, chromium and cerium according tothe stoichiometric ratio of each chemical composition of an expression, mixing, and grinding to a micron scale; 2) calcining the raw material powder in a reducing atmosphere for 4-5 hours to obtain acalcined product; and 3, grinding the calcined product to a micron order to prepare Ce and Cr-containing fluorescent powder with a garnet structure, mixing the fluorescent powder with polymer resin according to a mass ratio of 1:4-1:1, and preparing the light conversion film according to the existing film preparation process. The fluorescent powder has the advantages that the emission intensity of the fluorescent powder in a red light region is greatly enhanced, the plant light supplementing capability is high, the efficiency is high, and plant growth is promoted.
Description
technical field [0001] The invention belongs to the technical field of agricultural light conversion materials, and relates to a light conversion film used for plant growth. Background technique [0002] Plants need light to provide energy in the process of growth and development, so the regulation of light is one of the important means to regulate plant growth. Phosphor powder for plant growth is a phosphor powder that promotes rapid growth of plants and shortens the maturity cycle. Plants absorb light mainly through chlorophyll and carotenoids, which absorb light in the blue light region (400nm-500nm) and red light region (600nm-700nm), and phytochrome absorbs red light and deep red (650nm -750nm) region, corresponding to phototropism, photosynthesis and photomorphogenesis, respectively. Among them, the most important thing for plant growth is the light in the red light region (600nm-700nm), because red light has a great influence on the flowering and mature stages of pla...
Claims
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