SILICATE PHOSPHOR, METHOD OF MANUFACTURING SILICATE PHOSPHOR, AND LIGHT-GENERATING DEVICE HAVING SILICATE PHOSPHOR

摘要

PURPOSE: A silicate phosphor is provided to have high light emitting efficiency, to maintain stable light emitting brightness at high temperatures, and to have simple production process and to have small emitting color change. CONSTITUTION: A silicate phosphor is indicated in chemical formula 1: Ca_(2-x-y-z)M_xSiO_4: yCe^(3+), zN, and has an orthorhombic gamma-phase in a space group 62 Pbnm. In chemical formula 1, M comprises at least one selected from Mg, Sr, Ba, Zn, Na, Al, Ga, Ge, P, As and Fe, N comprises at least one selected from Eu^(2+), Mn^(2+), Tb^(3+), Yb^(2+) and Tm^(3+), 0<= x < 0.5, 0< y <=0.1, and 0<= z <0.15. [Reference numerals] (AA) Start; (BB) End; (S10) Preparing raw material mixture; (S20) Sintering raw material mixture; (S30) Cooling; (S40) Grinding