Rare earth aluminate cyan fluorescent powder used for high color rendering property energy-saving lamp and its preparation method and use

Abstract

The present invention is blue-green phosphor powder of RE aluminate for high color developing property energy saving lamp and its preparation process and use. The RE aluminate hst molecular expression of SrMg2Al14O25:Eu2+, and main emitting peak at 480 nm. It is prepared through one high temperature solid phase process with the materials alumina, strontium carbonate, europia and magnesia in the weight ratio of 0.7 to 0.21 to 0.028 to 0.05. It may be excited with 250-300 nm ultraviolet ray to emit blue and green light at high efficiency. It has simple preparation process suitable for industrial production. It is applied in making fluorescent lamp through cooperation with other phosphor powder.

Description

technical field [0001] The invention belongs to the field of rare earth luminescent materials, in particular to a rare earth aluminate blue-green fluorescent powder for high color rendering energy-saving lamps and a preparation method thereof. The invention also relates to the use of this product. Background technique [0002] Color rendering is an important technical index of fluorescent lamps, expressed by color rendering index Ra (0-100). Generally, incandescent lamps and daylight have a high color rendering index, Ra reaches 100, and shows a full spectrum in the 380-780nm visible light band. In general, it can also be used as a relative standard to compare and identify the color rendering of fluorescent lamps. [0003] In recent years, it has been reported that people can improve work and study efficiency under natural light or imitation natural light lighting, which is beneficial to physical and mental health and maintains good visual effects. Therefore, the color ren...

AI Technical Summary

Problems solved by technology

[0005] However Y 2 o 3 : Eu red powder, (CeTb)MgAl 11 o 19 Green powder, BaMgAl 10 o 17 :Eu or BaMgAl 10 o 17 : Eu, Mn blue powder composed of tri-primary toner, so far has not been able to make compact energy-saving lamps with Ra≥90 and straight fluorescent lamps with Ra≥95

Studies have shown that as long as the mercury radiation at 405 and 436nm in fluorescent lamps is not reduced, and the blue-green light with a wavelength of 480-520nm and the red light above 620nm are not enhanced, it is difficult to achieve Ra ≥ 90 for compact energy-saving lamps and Ra for straight fluorescent lamps. ≥95