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Synthesis of nano-sized and highly sinterable Nd:YAG powders by the urea homogeneous precipitation method

Author:
Lv, Yaohui, Zhang, Wei, Liu, Hong, Sang, Yuanhua, Qin, Haiming, Tan, Jie, Tong, Liuniu
Source:
Powder technology 2012 v.217 pp. 140-147
ISSN:
0032-5910
Subject:
urea ammonium sulfate, aluminum, urea, ceramics, powders, ammonium sulfate, metal ions, yttrium
Abstract:
Neodymium-doped yttrium aluminum garnet (Nd:YAG) nanopowders were synthesized via the urea homogeneous precipitation method. The morphology and sintering property controlling effects of ammonium sulfate and urea during the synthesis process were discussed. Spawn-like and fibrillar precipitates were obtained without and with sulfate ions, respectively. Dispersive Nd:YAG nanopowder with proper sintering property was obtained with 1273K calcination for 2h from the precursor with 4.56wt.% ammonium sulfate. Combined with the influence of the [urea]/[metal ions]([U]/[M]) concentration ratio, the dispersion, composition and morphology of the Nd:YAG nanopowders could be controlled via homogeneous precipitation process. A transparent Nd:YAG ceramic was achieved from the Nd:YAG powders obtained with 4.56wt.% ammonium sulfate and a [U]/[M] concentration ratio of 40.
Agid:
1059817