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Synthesis of micron sized spherical LaPO 4 :Ce,Tb p hosphor by a homogeneous precipitation method

L. M. SHAN1,* , H. TANG1, Z. H. LI1, Z. Z. WANG1, G. B. LIU2

Affiliation

  1. Department of Material Science, Sichuan Engineering Technical College, Deyang 618000, China
  2. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China

Abstract

Micron sized spherical LaPO 4 :Ce,Tb precipitate w as synthesized by a new homogeneous precipitation method. Then, spherical LaPO 4 :Ce,Tb phosphor w as fabricated using as p repared LaPO 4 :Ce,Tb precipitate as a precursor . The morphologies of LaPO 4 :Ce,Tb precipitate and phosphor were detected by scanning electron microscopy (SEM). The structures of LaPO 4 :Ce,Tb precipitate and phosphor were characterized by X ray diffraction (XR D). Then, the growth mechanism of spherical LaPO 4 :Ce,Tb precipitate was investigated . The results indicate that the LaPO 4 :Ce,Tb precipitate particles were the sec ondary agglomerated particle of needle shape primary nano particles. The LaPO 4 :Ce,Tb phosphor particles remain the same morphology of the precipitate particles. The diameters of LaPO 4 :Ce,Tb phosphor particle s are between 2.0 and 5.0 μm . Meanwhile, as prepared spherical LaPO 4 :Ce,Tb phosphor exhibit s stronger emission intensity than irregular one fab ricated by a conventional co precipitation method, which is ascribed to a smoother surface of the dispersive spherical particles.

Keywords

Morphology, Spherical phosphor, LaPO 4 :Ce,Tb, Co-precipitation.

Citation

L. M. SHAN, H. TANG, Z. H. LI, Z. Z. WANG, G. B. LIU, Synthesis of micron sized spherical LaPO 4 :Ce,Tb p hosphor by a homogeneous precipitation method, Optoelectronics and Advanced Materials - Rapid Communications, 8, 11-12, November-December 2014, pp.1062-1067 (2014).

Submitted at: Oct. 5, 2014

Accepted at: Nov. 13, 2014