Sol-gel approach to Sr2CeO4 phosphor from single alkoxide precursors

被引：20

作者：

Kim, H

Kim, YT

Chae, HK ^{[1
]}

机构：

[1] Hankuk Univ Foreign Studies, Dept Chem, Yongin 449791, South Korea

[2] Ajou Univ, Dept Mol Sci & Technol, Suwon 442749, South Korea

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2005年 / 33卷 / 01期

关键词：

single precursor; alkoxide; phosphor; sol-gel; Sr2CeO4;

D O I：

10.1007/s10971-005-6703-1

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Syntheses and characterizations of sol-gel precursors of Sr2CeO4 were carried out. Each molecular precursor, [Sr2Ce(OCH2CH2OCH3)(8)] (1), [Sr2Ce((OPr)-Pr-i)(8)] (2) and [Sr2Ce2((OPr)-Pr-i)(12)((PrOH)-Pr-i)(4)] (3) was prepared from mixtures of Sr complexes and cerium(IV) alkoxides. The molecular structure of 3 showed that [CeO6] octahedra are connected with distorted [SrO6] octahedra by sharing edges with oxo, bridges. X-ray powder diffraction patterns and spectrofluorometry were used to determine the evolution of structure from the precursor molecules to the luminescent oxides. The luminescent strontium cerium oxides were derived at relatively mild reaction conditions (700 degrees C for 1 h), and complete conversion was observed at 1000 degrees C for 1 h from these precursors. Comparing the spectra of the oxides derived from 2 and 3, the emission intensity of the oxide derived from 2 is much stronger.

引用

页码：75 / 80

页数：6

共 16 条

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