Combustion synthesis of fine particle rare earth orthoaluminates and yttrium aluminum garnet

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/0022-4596(90)90239-T· OSTI ID:6085534

Kingsley, J J; Suresh, K; Patil, K C ^[1]

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1. Indian Institute of Science, Bangalore (India)

Fine particle earth orthoaluminates, LnAlO{sub 3}, where Ln = La, Pr, Nd, Sm, Gd, Tb, and Dy, and yttrium aluminum garnet, Y{sub 3}Al{sub 5}O{sub 12} (YAG), have been prepared by a novel combustion process using corresponding rare earth nitrate, aluminum nitrate, and urea/carbohydrazide mixtures. A saturated aqueous solution of the mixture when rapidly heated at 500{degree}C foams and ignites to yield voluminous, crystalline single phase rare earth orthoaluminates in less than 5 min. The solid combustion products were characterized by XRD, SEM, TEM, particle size analysis, and surface area measurements. Rare earth orthoaluminates obtained have 3-4 m{sup 2}/g surface area, with particle size in the range of 0.1-0.6 {mu}m and an average agglomerate size of 4-5 {mu}m.

• OSTI ID: 6085534
• Journal Information: Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 88:2; ISSN JSSCB; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALUMINATES
ALUMINIUM COMPOUNDS
AQUEOUS SOLUTIONS
CHEMICAL PREPARATION
COHERENT SCATTERING
DIFFRACTION
DISPERSIONS
DYSPROSIUM
ELECTRON MICROSCOPY
ELEMENTS
GADOLINIUM
GARNETS
LANTHANUM
METALS
MICROSCOPY
MINERALS
MIXTURES
NEODYMIUM
OXYGEN COMPOUNDS
PRASEODYMIUM
RARE EARTHS
SAMARIUM
SCANNING ELECTRON MICROSCOPY
SCATTERING
SILICATES
SILICON COMPOUNDS
SOLUTIONS
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TERBIUM
TRANSITION ELEMENTS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTRIUM