Current time in Korea 00:38 Sep 23 (Wed) Year 2020 KCS KCS Publications
KCS Publications
My Journal  Log In  Register
HOME > Search > Browsing(BKCS) > Archives

Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 11, Number 5
BKCSDE 11(5)
May 20, 1990 

 
Title
Formation Process of a Red Phosphor, Y2O2S : Eu3+
Author
So-Young Chang, Chai-Ik Jeon, Chong-Hong Pyun, Q. Won Choi, Chang-Hong Kim
Keywords
Abstract
Yttrium oxysulfide incoporated with europium has been prepared by direct heating the mixture of Y2O3, Eu2O3, NaOH(or Na2CO3), and S. The reaction of the mixture at low temperatures and treatment at higher temperatures are studied. The formation of Y2O2S is completed at lower temperature (ca. 500℃) and incorporation of Eu3+ into Y2O2S lattice proceeds at higher temperature (above 1000℃) along with crystal growth. Small amount of the unknown phase considered to be Y2O2S2 is formed along with Y2O2S in the temperature range from 400℃ to 460℃.
Page
386 - 390
Full Text
PDF