Manufacturing method of red fluorescent powder for tri-phosphor energy saving lamp

Abstract

The invention relates to a manufacturing method of red fluorescent powder for a tri-phosphor energy saving lamp. The manufacturing method of the red fluorescent powder comprises the following steps of: firstly, sieving raw materials, namely Y2O3, Eu2O3, LiF, H3BO3 and BaCl2, and then mixing to form a raw material of the red fluorescent powder; secondly, mixing the sieved raw materials, placing the mixed raw materials into a tunnel furnace under the oxidation atmosphere, firing at a high temperature, and cooling to obtain a fired product, namely a primary product; thirdly, grinding the fired fluorescent primary product, sieving with a 100-mesh sieve, throwing the sieved fluorescent powder into a dispersion machine, sieving powder syrup with a 500-mesh water sieve, washing, carrying out suction filtration, drying, and sieving the dried powder with a 200-mesh sieve, thus the red fluorescent powder for the tri-phosphor energy saving lamp is obtained. The obtained fluorescent powder has the characteristics of small high temperature attenuation, moderate particle size and high lighting effect.

Description

technical field [0001] The invention belongs to the technical field of fluorescent powder preparation, and in particular relates to a method for manufacturing red fluorescent powder for tricolor energy-saving lamps. Background technique [0002] At the end of the 20th century, from the perspective of energy-saving lighting, people's demand for energy-saving lamps has become more and more extensive. Energy-saving lamps made of tri-primary energy-saving lamp powder are widely used. However, the shortcomings of this energy-saving lamp are gradually emerging, especially in the application of compact tri-primary energy-saving lamps. The temperature in the bulb is relatively high, generally 70-180 degrees Celsius, which requires the phosphor powder coated on the inner wall of the bulb to have high temperature resistance, especially the three-color red used in it has high temperature resistance at this temperature, specifically , The red phosphor powder used in this kind of bulb l...

AI Technical Summary

Problems solved by technology

Energy-saving lamps made of tri-primary energy-saving lamp powder are widely used. However, the shortcomings of this energy-saving lamp are gradually emerging, especially in the application of compact tri-primary energy-saving lamps. The temperature in the bulb is relatively high, generally 70-180 degrees Celsius, which requires the phosphor powder coated on the inner wall of the bulb to have high temperature resistance, especially the three-color red used in it has high temperature resistance at this temperature, specifically , the luminous efficiency of the red phosphor powder used in this kind of bulb lamp cannot be reduced in a closed environment of 70-180 degrees Celsius, and the phenomenon of thermal quenching cannot occur when used at high temperatures