Efficient UV-emitting X-ray phosphors: Octahedral Zr(PO4) 6 luminescence centers in potassium hafnium-zirconium phosphates K2Hf1-xZrx(PO4)2 and KHf2(1-x)Zr2x(PO4)3

C. C. Torardi; C. R. Miao; J. Li

doi:10.1016/S0022-4596(02)00087-7

Efficient UV-emitting X-ray phosphors: Octahedral Zr(PO₄) ₆ luminescence centers in potassium hafnium-zirconium phosphates K₂Hf_1-xZr_x(PO₄)₂ and KHf_2(1-x)Zr_2x(PO₄)₃

C. C. Torardi, C. R. Miao, J. Li

School of Arts and Sciences, Chemistry & Chemical Biology

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

Potassium hafnium-zirconium phosphates, K₂Hf _1-xZr_x(PO₄)₂ and KHf _2(1-x)Zr_2x(PO₄)₃, are broad-band UV-emitting phosphors. At room temperature, they have emission peak maxima at approximately 322 and 305nm, respectively, under 30kV peak molybdenum X-ray excitation. Both phosphors demonstrate luminescence efficiencies that make them up to ∼60% as bright as commercially available CaWO₄ Hi-Plus. The solid-state and flux synthesis conditions, and X-ray excited UV luminescence of these two phosphors are discussed. Even though the two compounds have different atomic structures, they contain zirconium in the same active luminescence environment as that found in highly efficient UV-emitting BaHf_1-xZr_x(PO₄)₂. All the three materials have hafnium and zirconium in octahedral coordination via oxygen-atom corner sharing with six separate PO₄ tetrahedra. This octahedral Zr(PO₄)₆ moiety appears to be an important structural element for efficient X-ray excited luminescence, as are the edge-sharing octahedral TaO₆ chains for tantalate emission.

Original language	English (US)
Pages (from-to)	289-293
Number of pages	5
Journal	Journal of Solid State Chemistry
Volume	170
Issue number	2
DOIs	https://doi.org/10.1016/S0022-4596(02)00087-7
State	Published - Feb 1 2003

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Keywords

Potassium hafnium-zirconium phosphate
Tantalum luminescence
UV emission
X-ray phosphor
Zirconium luminescence

Access to Document

10.1016/S0022-4596(02)00087-7

Cite this

@article{69ee00e6cf024defa18abf9380135f4f,

title = "Efficient UV-emitting X-ray phosphors: Octahedral Zr(PO4) 6 luminescence centers in potassium hafnium-zirconium phosphates K2Hf1-xZrx(PO4)2 and KHf2(1-x)Zr2x(PO4)3",

abstract = "Potassium hafnium-zirconium phosphates, K2Hf 1-xZrx(PO4)2 and KHf 2(1-x)Zr2x(PO4)3, are broad-band UV-emitting phosphors. At room temperature, they have emission peak maxima at approximately 322 and 305nm, respectively, under 30kV peak molybdenum X-ray excitation. Both phosphors demonstrate luminescence efficiencies that make them up to ∼60% as bright as commercially available CaWO4 Hi-Plus. The solid-state and flux synthesis conditions, and X-ray excited UV luminescence of these two phosphors are discussed. Even though the two compounds have different atomic structures, they contain zirconium in the same active luminescence environment as that found in highly efficient UV-emitting BaHf1-xZrx(PO4)2. All the three materials have hafnium and zirconium in octahedral coordination via oxygen-atom corner sharing with six separate PO4 tetrahedra. This octahedral Zr(PO4)6 moiety appears to be an important structural element for efficient X-ray excited luminescence, as are the edge-sharing octahedral TaO6 chains for tantalate emission.",

keywords = "Potassium hafnium-zirconium phosphate, Tantalum luminescence, UV emission, X-ray phosphor, Zirconium luminescence",

author = "Torardi, {C. C.} and Miao, {C. R.} and J. Li",

year = "2003",

month = feb,

day = "1",

doi = "10.1016/S0022-4596(02)00087-7",

language = "English (US)",

volume = "170",

pages = "289--293",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

number = "2",

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TY - JOUR

T1 - Efficient UV-emitting X-ray phosphors

T2 - Octahedral Zr(PO4) 6 luminescence centers in potassium hafnium-zirconium phosphates K2Hf1-xZrx(PO4)2 and KHf2(1-x)Zr2x(PO4)3

AU - Torardi, C. C.

AU - Miao, C. R.

AU - Li, J.

PY - 2003/2/1

Y1 - 2003/2/1

N2 - Potassium hafnium-zirconium phosphates, K2Hf 1-xZrx(PO4)2 and KHf 2(1-x)Zr2x(PO4)3, are broad-band UV-emitting phosphors. At room temperature, they have emission peak maxima at approximately 322 and 305nm, respectively, under 30kV peak molybdenum X-ray excitation. Both phosphors demonstrate luminescence efficiencies that make them up to ∼60% as bright as commercially available CaWO4 Hi-Plus. The solid-state and flux synthesis conditions, and X-ray excited UV luminescence of these two phosphors are discussed. Even though the two compounds have different atomic structures, they contain zirconium in the same active luminescence environment as that found in highly efficient UV-emitting BaHf1-xZrx(PO4)2. All the three materials have hafnium and zirconium in octahedral coordination via oxygen-atom corner sharing with six separate PO4 tetrahedra. This octahedral Zr(PO4)6 moiety appears to be an important structural element for efficient X-ray excited luminescence, as are the edge-sharing octahedral TaO6 chains for tantalate emission.

AB - Potassium hafnium-zirconium phosphates, K2Hf 1-xZrx(PO4)2 and KHf 2(1-x)Zr2x(PO4)3, are broad-band UV-emitting phosphors. At room temperature, they have emission peak maxima at approximately 322 and 305nm, respectively, under 30kV peak molybdenum X-ray excitation. Both phosphors demonstrate luminescence efficiencies that make them up to ∼60% as bright as commercially available CaWO4 Hi-Plus. The solid-state and flux synthesis conditions, and X-ray excited UV luminescence of these two phosphors are discussed. Even though the two compounds have different atomic structures, they contain zirconium in the same active luminescence environment as that found in highly efficient UV-emitting BaHf1-xZrx(PO4)2. All the three materials have hafnium and zirconium in octahedral coordination via oxygen-atom corner sharing with six separate PO4 tetrahedra. This octahedral Zr(PO4)6 moiety appears to be an important structural element for efficient X-ray excited luminescence, as are the edge-sharing octahedral TaO6 chains for tantalate emission.

KW - Potassium hafnium-zirconium phosphate

KW - Tantalum luminescence

KW - UV emission

KW - X-ray phosphor

KW - Zirconium luminescence

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