Synthesis of a luminescent material with considerable adaptability

For high-temperature solid-phase luminescent particles coarser prepared by ball milling crystal is destroyed, so that the significant decline in brightness shortcomings , people developed the " combustion " preparation techniques . Kingsley , etc. A certain amount of Al (NO3) 3.9 H2O, Sr (NO3) 2.4 H2O and urea , dissolved in a small amount of water , and the resultant solution was placed in a constant temperature of about 500 ℃ horse boiling furnace. Initially solution was boiled , then photochromic masterbatch, decomposition , accompanied by a large amount of gases (mainly NO and NH3). Then start blistering , swelling, the bubble burst and burned , emits white light . The resulting product is a porous foam SrAl2O4, single phase product , photoluminescent exit signs material synthesized with considerable adaptability of the gas generated in the combustion process can restore the Eu3 + Eu2 +, without the need to restore the protective atmosphere . This approach can significantly reduce the furnace temperature , a meaningful synthesis of energy-efficient .