The crystal structure and luminescent properties of nitrogen-rich Ca-α-sialon:Eu with saturated calcium solubility fabricated by the alloy-nitridation method

doi:10.1088/1674-1056/21/7/077802

中国物理B ›› 2012, Vol. 21 ›› Issue (7): 77802-077802.doi: 10.1088/1674-1056/21/7/077802

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

The crystal structure and luminescent properties of nitrogen-rich Ca-α-sialon:Eu with saturated calcium solubility fabricated by the alloy-nitridation method

杨建军, 陈国动, 杜飞飞, 刘泉林

School of Materials Science & Engineering and State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

收稿日期:2011-11-24 修回日期:2011-12-15 出版日期:2012-06-01 发布日期:2012-06-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 90922027), the National High Technology Research and Development Program of China (Grant No. 2009AA03Z432), and the Doctoral Fund of Ministry of China (Grant No. 20100006110011).

The crystal structure and luminescent properties of nitrogen-rich Ca-α-sialon:Eu with saturated calcium solubility fabricated by the alloy-nitridation method

Yang Jian-Jun(杨建军), Chen Guo-Dong(陈国动), Du Fei-Fei(杜飞飞), and Liu Quan-Lin(刘泉林)^†

School of Materials Science & Engineering and State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

Received:2011-11-24 Revised:2011-12-15 Online:2012-06-01 Published:2012-06-01
Contact: Liu Quan-Lin E-mail:qlliu@ustb.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 90922027), the National High Technology Research and Development Program of China (Grant No. 2009AA03Z432), and the Doctoral Fund of Ministry of China (Grant No. 20100006110011).

摘要/Abstract

摘要： Nitrogen-rich Ca- -sialon: Eu²⁺ phosphors with saturated calcium solubility are synthesized through a solidstate reaction (SSR) at 2173 K with stable alloy and nitride as the starting materials. The Ca_1.83-1.5xSi_8.34 Al_3.66O_xN_16-x: xEu phosphors have intensive orange emissions, whose peaks are located at approximately 585–600 nm, and the emission wavelengths tend to shift toward the red region when the Eu concentrations increase from 0.5% to 18% (mole percentage). When the Eu concentration is equal to 9%, the phosphors suffer from concentration quenching. The low-temperature photoluminescence properties indicate that Ca_1.83-1.5xSi_8.34Al_3.66O_xN_16-x: xEu phosphors show excellent thermal quenching. The crystal structures of Ca_1.83-1.5xSi_8.34Al_3.66OO_xN_16-x: xEu are also investigated, and are found to have nitrogen-rich compositions with saturated calcium cations at the interstitial sites of the α-sialons. In addition, the influencing factors of -sialons with different compositions on the crystal lattice are discussed in detail.

关键词: Ca-α-sialon, crystal structure, luminescence, alloy-nitridation

Abstract: Nitrogen-rich Ca- -sialon: Eu²⁺ phosphors with saturated calcium solubility are synthesized through a solidstate reaction (SSR) at 2173 K with stable alloy and nitride as the starting materials. The Ca_1.83-1.5xSi_8.34 Al_3.66O_xN_16-x: xEu phosphors have intensive orange emissions, whose peaks are located at approximately 585–600 nm, and the emission wavelengths tend to shift toward the red region when the Eu concentrations increase from 0.5% to 18% (mole percentage). When the Eu concentration is equal to 9%, the phosphors suffer from concentration quenching. The low-temperature photoluminescence properties indicate that Ca_1.83-1.5xSi_8.34Al_3.66O_xN_16-x: xEu phosphors show excellent thermal quenching. The crystal structures of Ca_1.83-1.5xSi_8.34Al_3.66OO_xN_16-x: xEu are also investigated, and are found to have nitrogen-rich compositions with saturated calcium cations at the interstitial sites of the α-sialons. In addition, the influencing factors of -sialons with different compositions on the crystal lattice are discussed in detail.

Key words: Ca-α-sialon, crystal structure, luminescence, alloy-nitridation

中图分类号: (Other solid inorganic materials)

78.55.Hx

81.05.Je (Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)) 61.66.Fn (Inorganic compounds)

杨建军, 陈国动, 杜飞飞, 刘泉林 . The crystal structure and luminescent properties of nitrogen-rich Ca-α-sialon:Eu with saturated calcium solubility fabricated by the alloy-nitridation method[J]. 中国物理B, 2012, 21(7): 77802-077802.

Yang Jian-Jun(杨建军), Chen Guo-Dong(陈国动), Du Fei-Fei(杜飞飞), and Liu Quan-Lin(刘泉林) . The crystal structure and luminescent properties of nitrogen-rich Ca-α-sialon:Eu with saturated calcium solubility fabricated by the alloy-nitridation method[J]. Chin. Phys. B, 2012, 21(7): 77802-077802.

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The crystal structure and luminescent properties of nitrogen-rich Ca-α-sialon:Eu with saturated calcium solubility fabricated by the alloy-nitridation method

The crystal structure and luminescent properties of nitrogen-rich Ca-α-sialon:Eu with saturated calcium solubility fabricated by the alloy-nitridation method

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