Sol-gel synthesis and characterizations of crystalline NaGd(WO4)2 powder for anisotropic transparent ceramic laser application

被引：39

作者：

Durairajan, A. ^{[1
]}

Thangaraju, D. ^{[1
]}

Balaji, D. ^{[1
]}

Babu, S. Moorthy ^{[1
]}

机构：

[1] Anna Univ, Ctr Crystal Growth, Madras 600025, Tamil Nadu, India

来源：

OPTICAL MATERIALS | 2013年 / 35卷 / 04期

关键词：

Transparent ceramics; NaGd(WO4)(2); Nanocrystalline powders; Sol-gel; FE-SEM; Raman; SODIUM GADOLINIUM TUNGSTATE; SINGLE-CRYSTALS; PHYSICAL-CHARACTERIZATION; RAMAN-SPECTRA; GD; YB;

D O I：

10.1016/j.optmat.2012.08.018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

NaGd(WO4)(2) powders were synthesized at different pH (3.5, 4.5, 5.5, 6.5 and 7.5) values by conventional Pechini method. Sodium and gadolinium nitrate salts and ammonium paratungstate are used as starting precursors. Metal cations were chelated by citric acid and individual citrates were bound together with ethylene glycol. Synthesized gel was analyzed using differential thermal analysis (DTA), thermo gravimetric (TG) and FT-IR spectroscopy to understand the degradation of gel and formation of metal citrates. Calcined powders (250, 600, 700 and 800 degrees C) were characterized by powder XRD, FT-IR, Raman and FE-SEM analysis. The temperature dependent phase formation was examined by powder XRD. The morphological changes at different pH derived powders were observed with FE-SEM micrographs. Stepwise organic liberation with respect to temperature and presence of carbon content in the pre-fired powder were analyzed using FT-IR analysis. Raman spectrum reveals disordered tungstate vibrations in the NGW matrix. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：740 / 743

页数：4

共 24 条

[1] Growth and properties of NaEr(WO4)2 crystals [J].

Cheng, ZX ;

Lu, QM ;

Zhang, SJ ;

Liu, JH ;

Yi, XJ ;

Song, F ;

Kong, YF ;

Han, JR ;

Chen, HC .

JOURNAL OF CRYSTAL GROWTH, 2001, 222 (04) :797-800

[2] Raman spectroscopy of the molybdate minerals chillagite (tungsteinian wulfenite-I4), stolzite, scheelite, wolframite and wulfenite [J].

Crane, M ;

Frost, RL ;

Williams, PA ;

Kloprogge, JT .

JOURNAL OF RAMAN SPECTROSCOPY, 2002, 33 (01) :62-66

[3]

Faure N, 1996, APPL PHYS B-LASERS O, V63, P593

[4] Sol-gel modified Pechini method for obtaining nanocrystalline KRE(WO4)2 (RE = Gd and Yb) [J].

Galceran, M. ;

Pujol, M. C. ;

Aguilo, M. ;

Diaz, F. .

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2007, 42 (01) :79-88

[5] Synthesis of monoclinic KGd(WO4)2 nanocrystals by two preparation methods [J].

Galceran, M. ;

Pujol, M. C. ;

Mendez, C. ;

Garcia, A. ;

Moreno, P. ;

Roso, L. ;

Aguilo, M. ;

Diaz, F. .

JOURNAL OF NANOPARTICLE RESEARCH, 2009, 11 (03) :717-724

[6] Ceramic laser materials [J].

Ikesue, Akio ;

Aung, Yan Lin .

NATURE PHOTONICS, 2008, 2 (12) :721-727

[7] Optical spectroscopy and visible stimulated emission of Dy3+ ions in monoclinic α-KY(WO4)2 and α-KGd(WO4)2 crystals -: art. no. 125108 [J].

Kaminskii, AA ;

Gruber, JB ;

Bagaev, SN ;

Ueda, K ;

Hömmerich, U ;

Seo, JT ;

Temple, D ;

Zandi, B ;

Kornienko, AA ;

Dunina, EB ;

Pavlyuk, AA ;

Klevtsova, RF ;

Kuznetsov, FA .

PHYSICAL REVIEW B, 2002, 65 (12) :1-29

[8]

Klevtsov P.V., 1970, Journal of Solid State Chemistry, V2, P278, DOI DOI 10.1016/0022-4596(70)90080-0

[9] Morphology-Controlled Synthesis, Physical Characterization, and Photoluminescence of Novel Self-Assembled Pomponlike White Light Phosphor: Eu3+-Doped Sodium Gadolinium Tungstate [J].

Lei, Fang ;

Yan, Bing .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (03) :1074-1082

[10] Polarized Raman spectra of the oriented NaY(WO4)2 and KY(WO4)2 single crystals [J].

Macalik, L ;

Hanuza, J ;

Kaminskii, AA .

JOURNAL OF MOLECULAR STRUCTURE, 2000, 555 :289-297

← 1 2 3 →