Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (10): 907-911.doi: 10.3866/PKU.WHXB19951010

• ARTICLE • Previous Articles     Next Articles

Elecutron Transfer and its Equilibrium between Eu and Tb in SrMgF4 System

Wu Yinh,Shi Chun-Shan   

  1. Laboratory of Rare Earth Chemistry and Physics,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022
  • Received:1994-12-03 Revised:1995-03-10 Published:1995-10-15
  • Contact: Shi Chun-Shan

Abstract:

Emission of europium(Ⅱ) and europium(Ⅲ) have been observed in SrMgF4:xEu, yTb phosphors which are synthesized in Ar flow. The valence state of Eu is influenced by terbium. It is noted that the intensities of the ESR peaks corresponding to Eu2+are increased when terbium ion is codoped, this can be explained by electron transfer mechanism which is Eu3++Tb3+ →Eu2++Tb4+. And its equilibrium constant is calculated.

Key words: Rare earth valence, Electron transfer, ESR spectrum