Another invention patent was granted



Recently, another invention patent of nitride red phosphor was granted, named Nitride fluorescent powder and preparation method thereof, numbered ZL 201210410887.2.

The invention discloses nitride fluorescent powder and its preparation method. The nitride fluorescent powder has the chemical structural formula of Ca1-r-tLitAlaSibNcOd : rR, wherein a is ranged from 0 to 1; b is ranged from 0.9 to 1; c is ranged from 2 to 3; d is ranged from 0 to 3r/2, r is ranged from 0.001 to 0.3, and t is ranged from 0.001 to 0.1; R is Eu; or Eu is mixed with any one of La, Ce, Gd, Ho, Er, Tm, Yb and Lu based on any ratio. The preparation method comprises steps as follows: weighing corresponding raw materials according to stoichiometric ratio; adding proper activating agents and active carbon; sealing after mixing in a glovebox; then roasting on sections under protective atmosphere by normal-pressure and high-temperature; and then processing to obtain the nitride fluorescent powder. The luminescent materials provided by the invention has the characteristics of high chemical stability, high luminous efficiency and good resistance to light failure; and the advantage of simple production, free of pollution and low cost.

The invention patent has been applied in the company's products, which effectively ensures the promotion and application of the company's independent intellectual property products.