Imperial College London

ProfessorNeilAlford

Central FacultyOffice of the Provost

Associate Provost (Academic Planning)
 
 
 
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Contact

 

+44 (0)20 7594 6724n.alford

 
 
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Assistant

 

Miss Catherine Graham +44 (0)20 7594 3330

 
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Location

 

2..05 (in RSM) or 3.09 (in the Faculty Building)Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Seabra:2004:10.1111/j.1551-2916.2004.00584.x,
author = {Seabra, MP and Avdeev, M and Ferreira, VM and Pullar, RC and Alford, NMN and Reaney, IM},
doi = {10.1111/j.1551-2916.2004.00584.x},
journal = {Journal of the American Ceramic Society},
pages = {584--590},
title = {Structure-property relations in xBaTiO<inf>3</inf>-(1-x)La(Mg<inf>1/2</inf>Ti<inf>1/2</inf>)O<inf>3</inf> solid solutions},
url = {http://dx.doi.org/10.1111/j.1551-2916.2004.00584.x},
volume = {87},
year = {2004}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The microwave dielectric properties and microstructures of compounds in the solid solution series xBaTiO3-(1-x)La(Mg1/2-Ti1/2)O3 (BTLMT) have been investigated. The structural phase transitions that occur as a function of x have been studied and are related to changes in the dielectric properties. For compounds where x ≤ 0.1, X-ray diffraction (XRD) showed evidence of 1:1 ordering between Mg and Ti cations. For x ≤ 0.3, XRD and electron diffraction revealed that compounds were tilted in both antiphase and in-phase. However, for 0.3 < x < 0.7, only antiphase tilting was present. The temperature coefficient of resonant frequency (τf) vs the relative permittivity (εr) was linear until x = 0.5 at which point in the solid solution the transition to a nontilted structure resulted in nonlinear behavior. τf values close to zero (-2 ppm/°C) were achieved at x = 0.5 (εr ∼ 60), which had a quality factor (Q·fo) of 9600 GHz.
AU - Seabra,MP
AU - Avdeev,M
AU - Ferreira,VM
AU - Pullar,RC
AU - Alford,NMN
AU - Reaney,IM
DO - 10.1111/j.1551-2916.2004.00584.x
EP - 590
PY - 2004///
SN - 0002-7820
SP - 584
TI - Structure-property relations in xBaTiO<inf>3</inf>-(1-x)La(Mg<inf>1/2</inf>Ti<inf>1/2</inf>)O<inf>3</inf> solid solutions
T2 - Journal of the American Ceramic Society
UR - http://dx.doi.org/10.1111/j.1551-2916.2004.00584.x
VL - 87
ER -