Synthesis of nanocrystalline yttria doped ceria powder by urea-formaldehyde polymer gel auto-combustion process

Journal Article · Thu Apr 12 00:00:00 EDT 2007 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2006.08.017· OSTI ID:21000613

Biswas, M ^[1]; Prabhakaran, K ^[1]; Gokhale, N M ^[1]; Sharma, S C ^[1]

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1. Ceramic Division, Naval Materials Research Laboratory, Defence Research and Development Organization, Shil Badlapur Road, Anandnagar P.O., Addl. Ambernath, Thane 421 506 (India)

Nanocrystalline yttria doped ceria powder has been prepared by auto-combustion of a transparent gel formed by heating an aqueous acidic solution containing methylol urea, urea, cerium(III) nitrate and yttrium(III) nitrate. The TGA and DSC studies showed the combustion reaction of the gel initiated at 225 deg. C and completed within a short period of time. XRD spectrum of the combustion product reveals the formation of phase pure cubic yttria doped ceria during the combustion process. Loose agglomerate of yttria doped ceria particle obtained by the combustion reaction could be easily deagglomerated by planetary ball milling and the powder obtained contains particles in the size range of 0.05-3.3 {mu}m with D {sub 50} value of 0.13 {mu}m. The powder particles are aggregate of nanocrystallites with a wide size range of 14-105 nm. Pellets prepared by pressing the yttria doped ceria powder sintered to 95.2% TD at 1400 deg. C.

• OSTI ID: 21000613
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 4 Vol. 42; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALORIMETRY
CERIUM NITRATES
CERIUM OXIDES
CHEMICAL PREPARATION
COMBUSTION
COMBUSTION PRODUCTS
CRYSTALS
DOPED MATERIALS
FORMALDEHYDE
GELS
HEATING
MICROSTRUCTURE
MILLING
NANOSTRUCTURES
PELLETS
POLYMERS
PRESSING
THERMAL GRAVIMETRIC ANALYSIS
UREA
X-RAY DIFFRACTION
YTTRIUM NITRATES
YTTRIUM OXIDES