Structure and Morphology of ACEL ZnS:Cu,Cl Phosphor Powder Etched by Hydrochloric Acid

Structure and Morphology of ACEL ZnS:Cu,Cl Phosphor Powder Etched by Hydrochloric Acid
复制标题

盐酸蚀刻ACEL ZnS:Cu,Cl荧光粉的结构与形貌

DOI:
10.1149/1.3207950
复制
发表时间:
2009
影响因子:
3.9
通讯作者:
Withnall R
Withnall R
中科院分区:
工程技术4区
文献类型:
--
作者:
Withnall R

文献摘要

参考文献

被引文献

相似文献

尽管在过去的半个世纪中,交流粉末电致发光的机理仍然没有完全阐明,为此,需要更好地理解交流电致发光(ACEL)荧光粉的相对复杂的结构。因此,本文通过盐酸腐蚀样品的扫描电子显微镜(SEM)和X射线粉末衍射研究了ZnS:Cu,Cl荧光粉的结构和形貌。后一种技术证实,由于在其合成期间的两阶段烧制,磷光体从高温六方(纤锌矿)结构转化为具有高密度平面堆垛层错的低温立方(闪锌矿)多晶型物。光学显微镜观察发现,该荧光粉的晶体习性为六方多晶型,这可以用合成过程中六方相到立方相转变后的闪锌矿假晶来解释。经盐酸蚀刻的磷光体颗粒的SEM显微照片显示出蚀刻坑、沿立方[111]轴沿着的高密度平面堆垛层错以及(111)面上的棱锥。这些观察结果与源自显示金字塔的面的单向晶体生长一致。
Despite many researches over the last half century, the mechanism of ac powder electroluminescence remains to be fully elucidated and, to this end, a better understanding of the relatively complex structure of alternate current electroluminescence (ACEL) phosphors is required. Consequently, the structure and morphology of ZnS: Cu, Cl phosphor powders have been investigated herein by means of scanning electron microscopy (SEM) on hydrochloric acid-etched samples and X-ray powder diffraction. The latter technique confirmed that, as a result of two-stage firing during their synthesis, the phosphors were converted from the high temperature hexagonal (wurtzite) structure to the low temperature cubic (sphalerite) polymorph having a high density of planar stacking faults. Optical microscopy revealed that the crystal habit of the phosphor had the appearance of the hexagonal polymorph, which can be explained by the sphalerite pseudomorphing of the earlier wurtzite after undergoing the hexagonal to cubic phase transformation during the synthesis. SEM micrographs of the hydrochloric-etched phosphor particles revealed etch pits, a high density of planar stacking faults along the cubic [111] axis, and the pyramids on the (111) face. These observations were consistent with unidirectional crystal growth originating from the face showing the pyramids.
DOI: --
发表时间: 1983
期刊:
影响因子: --
作者:
M. Sebastian;P. Krishna
通讯作者: P. Krishna
DOI: --
发表时间: 2001
期刊:
影响因子: --
作者:
A. Wright;I. Viney
通讯作者: I. Viney
晶体中的随机、非随机和周期性断层
DOI: --
发表时间: 1994
期刊:
影响因子: --
作者:
M. Sebastian;P. Krishna;D. Nelson
通讯作者: D. Nelson
通过ε机器光谱重建理论推断密排结构中的平面无序:硫化锌的结构和本征计算。
DOI: --
发表时间: 2007
期刊: Acta Crystallographica Section B Structural Science
影响因子: --
作者:
D. P. Varn;Geoffrey Canright;Geoffrey Canright;J. P. Crutchfield;J. P. Crutchfield
通讯作者: J. P. Crutchfield
DOI: --
发表时间: 1963
期刊:
影响因子: --
作者:
A. G. Fischer
通讯作者: A. G. Fischer