Lead magnesium niobate-lead titanate fibres by a modified sol-gel method

Journal Article · Thu Nov 03 00:00:00 EST 2005 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2005.05.024· OSTI ID:20888111

Lam, K -H ^[1]; Kun, Li ^[1]; Chan, H L.-W. ^[1]

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1. Department of Applied Physics and Materials Research Centre, Hong Kong Polytechnic University, Hunghom, Kowloon, Hong Kong (China)

Lead magnesium niobate-lead titanate (PMN-PT) ceramic fibres with the nominal composition of 0.65Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-0.35PbTiO{sub 3} have been fabricated by a modified sol-gel method. Due to the difficulty of dissolving the magnesium component, the mixed oxide method was used together with the traditional sol-gel method. To obtain crack-free fibres, pyrolysis was carried out at a very slow heating rate under specific atmosphere to control the organic burnout. The thermal and microstructural properties were investigated using thermogravimetric analysis, scanning electron microscopy and X-ray diffraction. The optimum sintering temperature is 1200 deg. C and yields a fibre with a final diameter of around 100 {mu}m. A single PMN-PT fibre has been poled and its electrical properties were measured. The properties of the fibre are found to be better than that of a ceramic disc.

• OSTI ID: 20888111
• Journal Information: Materials Research Bulletin, Vol. 40, Issue 11; Other Information: DOI: 10.1016/j.materresbull.2005.05.024; PII: S0025-5408(05)00209-6; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BURNOUT
CERAMICS
ELECTRICAL PROPERTIES
FIBERS
HEATING RATE
LEAD
MAGNESIUM
MICROSTRUCTURE
NIOBATES
OXIDES
PYROLYSIS
SCANNING ELECTRON MICROSCOPY
SINTERING
SOL-GEL PROCESS
THERMAL GRAVIMETRIC ANALYSIS
TITANATES
X-RAY DIFFRACTION
YIELDS