Sol-gel preparation and electrical behaviour of Ln:YAG (Ln = Ce, Nd, Ho, Er)

被引：20

作者：

Garskaite, E ^{[1
]}

Jasaitis, D ^{[1
]}

Kareiva, A ^{[1
]}

机构：

[1] Vilnius State Univ, Dept Gen & Inorgan Chem, LT-2006 Vilnius, Lithuania

来源：

JOURNAL OF THE SERBIAN CHEMICAL SOCIETY | 2003年 / 68卷 / 8-9期

关键词：

sol-gel synthesis; garnet crystals; rare-earth doping; electrical properties;

D O I：

10.2298/JSC0309677G

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A sol-gel method has been developed to prepare pure yttrium aluminum garnet, Y3Al5O12 (YAG), and rare-earth substituted (Ce-Y3Al5O12, Nd-Y3Al5O12, Ho-Y3Al5O12, and Er-Y3Al5O12) samples. The XRD patterns of the polycrystalline powders sintered at 1000 T showed the formation of monophasic garner materials. The micro-structural features in the polycristalline samples were studied by scanning electron microscopy A homogeneous distribution of rare-earth dopants in the YAG lattice was achieved in all of the cases. Electrical conductivity measurements were also performed on the compacts of sol-gel derived Ln-YAG samples. In contrast to the expected dielectric behaviour, the conducting properties of the examined specimens indicate metallic behaviour with the resistivity increasing gradually with increasing temperature.

引用

页码：677 / 684

页数：8

共 25 条

[11] Sol-gel processing and sintering of yttrium aluminum garnet (YAG) powders [J].

Manalert, R ;

Rahaman, MN .

JOURNAL OF MATERIALS SCIENCE, 1996, 31 (13) :3453-3458

[12] The sintering behaviour, mechanical properties and creep resistance of aligned polycrystalline yttrium aluminium garnet (YAG) fibres, produced from an aqueous sol-gel precursor [J].

Pullar, RC ;

Taylor, MD ;

Bhattacharya, AK .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1999, 19 (09) :1747-1758

[13] The PTCR effect in BaTiO3 ceramics modified by donor dopant [J].

Qi, JQ ;

Gui, ZL ;

Wang, YL ;

Zhu, Q ;

Wu, YJ ;

Li, LT .

CERAMICS INTERNATIONAL, 2002, 28 (02) :141-143

[14] Synthesis of red-emitting, small particle size luminescent oxides using an optimized combustion process [J].

Shea, LE ;

McKittrick, J ;

Lopez, OA ;

Sluzky, E .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1996, 79 (12) :3257-3265

[15]

Sun TX, 1999, BIOTECHNOL BIOENG, V61, P193

[16] Discovering energy-transfer paths in laser crystals [J].

Toncelli, A ;

DiLieto, A ;

Minguzzi, P ;

Tonelli, M .

OPTICS LETTERS, 1997, 22 (15) :1165-1167

[17] Transmittance examination in sol-gel derived matrices for optoelectronic applications [J].

Ulatowska, A ;

Kudrawiec, R ;

Podbielska, H ;

Bryja, L ;

Misiewicz, J .

OPTICAL MATERIALS, 2001, 17 (1-2) :247-250

[18] Synthesis of yttrium aluminium garnet by the citrate gel process [J].

Vaqueiro, P ;

Lopez-Quintela, MA .

JOURNAL OF MATERIALS CHEMISTRY, 1998, 8 (01) :161-163

[19] Effects of energy back transfer on the luminescence of Yb and Er ions in YAG [J].

Vega-Durán, JT ;

Barbosa-García, O ;

Diáz-Torres, LA ;

Meneses-Nava, MA ;

Sumida, DS .

APPLIED PHYSICS LETTERS, 2000, 76 (15) :2032-2034

[20] Low temperature synthesis of nanocrystalline Y3Al5O12 (YAG) and Ce-doped Y3Al5O12 via different sol-gel methods [J].

Veith, M ;

Mathur, S ;

Kareiva, A ;

Jilavi, M ;

Zimmer, M ;

Huch, V .

JOURNAL OF MATERIALS CHEMISTRY, 1999, 9 (12) :3069-3079

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