Ceramics-Silikáty 53, (1) 15 - 19 (2009) |
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PYROELECTRIC AND D.C. RESISTIVITY STUDIES OF BARIUM STRONTIUM CERIUM LITHIUM SODIUM NIOBATE CERAMICS
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Chandramouli K. 1, Viswarupachary P. 1, Ramam Koduri 2
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1 Solid State Physics and Materials Research Laboratory, Department of Physics,
Andhra University, Visakhapatnam, India
2 Departmento de Ingenieria de Materials, (DIMAT), Facultad de Ingenieria,
Universidad de Concepcion, Concepcion, Chile
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Keywords: X-ray diffraction, Alkali-Lithium, Pyroelectric properties, D.C. resistivity, Tungsten bronze ceramic system
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Ba1.45Sr2.4Ce0.1LixNa2-xNb10O30 ceramic compositions in the range of x = 0.0 ≤ x ≤ 1.0, which belong to tungsten-bronze
structural family were prepared using a solid-state reaction technique. X-ray diffraction study confirms the formation of
the compounds in an orthorhombic tungsten bronze (mm², OTB) phase at room temperature which has been supported by
tolerance factor and average electronegativity difference. Measurement of conductivity as a function of temperature suggests
that the samples have positive temperature coefficient of resistance (PTCR) with typical semiconductor behavior which could
be suitable for pyroelectric and PTCR applications. The pyroelectric properties of BSCLNN – Barium Strontium Cerium
Lithium Sodium Niobate ceramics are reported. |
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