Search site

Institute for Materials Research

Electroceramics – dielectrics, piezoelectrics and ferroelectrics

Studies of new ferroelectric materials, in ceramic, single crystal and thin film form, have an emphasis on high temperature actuation. We also research multiferroics – materials in which ferromagnetism and ferroelectricity coexist. Our investigations of lead-free piezoelectrics focus on the preparation of grain-oriented materials by templating techniques. We have developed ceramics with promising dielectric stability at high temperatures and we are studying the dielectric breakdown of multilayer ceramic capacitors to support the development of new enhanced electronics components.

MS&T14 High Temperature Electromaterials

Academic Staff

Professor A J Bell
Dr T P Comyn
Dr F Esat
Dr G M Kale
Dr S J Milne
Dr T J Sevenson

Key Papers

Thin Films
Esat F; Comyn TP; Bell AJMicrostructure development of BiFeO3-PbTiO3 films deposited by pulsed laser deposition on platinum substrates.Acta Materialia, vol. 66, pp.44-53. 2014.

Bygrave F; Comyn TP; Bell AJThe effect of post deposition anneal temperature on the structure of BiFeO -PbTiO thin films.Thin Solid Films, 2012.

Khan MA; Comyn TP; Bell AJGrowth and characterization of tetragonal bismuth ferrite-lead titanate thin films.Acta Materialia, vol. 56, pp.2110-2118. 2008.

Khan MA; Comyn TP; Bell AJLeakage mechanisms in bismuth ferrite-lead titanate thin films on Pt/Si substrates.Applied Physics Letters, vol. 92, 2008.

Khan MA; Comyn TP; Bell AJLarge remanent polarization in ferroelectric BiFeO3-PbTiO3 thin films on Pt/Si substrates.Applied Physics Letters, vol. 91, 2007.

High Temperature Dielectrics

Zeb, Aurang; Milne, Steven J. ‘Dielectric Properties of Ba0.8Ca0.2TiO3-Bi(Mg0.5 Ti0.5)O3-NaNbO3 Ceramics’  J. Am. Cer. Soc. 96, 3701-3703 (2013 )

Kruea-In, Chatchai; Rujijanagul, Gobwute; Zhu, Fang Yuan; S J Milne. ‘Relaxor behaviour of K0.5Bi0.5TiO3-BiScO3 ceramics’ Appl. Phys. Letts. 100: 202904 (2012)

Zhu FY, Skidmore TA, Bell AJ, Comyn TP, James CW, Ward M, Milne SJ ‘Diffuse dielectric behaviour in Na0.5K0.5NbO3-LiTaO3-BiScO3 lead-free ceramics’ Mater Chem Phys 129(1-2):411-417   (2011)

Pb-free Piezoelectrics

Zeb, Aurang; Milne, Steven J. ‘Dielectric and Piezoelectric Properties of (1-x)K0.5Bi0.5TiO3xBa(Ti0.8Zr0.2)O3 Ceramics ‘ J. Am. Cer. Soc. 96, 3089-3093 (2013)

A Zeb and S J Milne. ‘Stability of High-Temperature Dielectric Properties for
(1 - x)Ba0.8Ca0.2TiO3–xBi(Mg0.5Ti0.5)O3 Ceramics’. J. Am. Ceram. Soc., 1–6 (2013)

T A Skidmore, T P Comyn, S J Milne. ‘Temperature stability of ([Na0.5K0.5NbO3](0.93)- [LiTaO3](0.07)) lead-free piezoelectric ceramics’. Appl. Phys. Lett 94(22) Art. No. 222902 01. (2009)

A Chowdhury, J Bould, MGS Londesborough, E Vecernikova, SJ Milne. ‘ Evidence of phase heterogeneity in sol-gel Na0.5K0.5NbO3 system.’ Mater Chem Phys 124(1):159-162 01 (2010)

Skidmore TA, Comyn TP, Bell AJ, Zhu F, Milne SJ ‘Phase diagram and structure-property    relationships in the lead-free piezoelectric system: Na0.5K0.5NbO3-LiTaO3. Invited IEEE Trans Ultrason Ferroelectr Freq Control 58(9):1819-1825 (2011)

Royles AJ, Bell AJ, Daniels JE, Milne SJ, Comyn TP ‘Observation of a time-dependent structural phase transition in potassium sodium bismuth titanate ‘.Appl. Phys. Lett 98(18): 182904 (2011)

Chowdhury A, Bould J, Londesborough MGS, Vecernikova E, Milne SJEvidence of phase heterogeneity in sol-gel Na0.5K0.5NbO3 system’  Mater Chem Phys 124(1):159-162 01 (2010)

Chowdhury A, Bould J, Londesborough MGS, Milne SJ ‘The effect of refluxing on the alkoxide-based sodium potassium niobate sol-gel system: Thermal and spectroscopic studies’ J Solid State Chem 184(2):317-324  (2011)

Bomlai P, Songsurin C, Muensit N, Milne SJStructural and electrical properties of (1-x) Na0.465K0.465Li0.07Nb0.93Ta0.07O3-x MnO lead-free piezoelectric ceramics synthesized at low sintering temperatures’ Science Asia 36(3):231-236 (2010)

Chowdhury A, Bould J, Londesborough MGS, Milne SJ ‘Fundamental Issues in the Synthesis of Ferroelectric Na0.5K0.5NbO3 Thin Films by Sol-Gel Processing’    Chem Mater 22(13):3862-3874 13 ( 2010)

Royles AJ, Bell AJ, Jephcoat AP, Kleppe AK, Milne SJ, Comyn TP ‘Electric-field-induced phase switching in the lead free piezoelectric potassium sodium bismuth titanate’ Appl. Phys. Lett. 97(13): Article number 132909 27 (2010)

A Chowdhury, J Bould, Y F Zhang, C James, S J Milne. ‘ Nano-powders of Na0.5K0.5NbO3 made by a sol-gel method’.  J. Nanoparticle.  Res., 12 , 209-215 (2010)

T A Skidmore, T P Comyn, S J Milne. ‘ Dielectric and Piezoelectric Properties in the System: (1- x)[(Na0.5K0.5NbO3)(0.93)-(LiTaO3)(0.07)]-x[BiScO3]’ J. Am. Ceram. Soc., 93(3) (2010)

T Bongkarn, G Rujijanagul, S J Milne. “Antiferroelectric-ferroelectric phase transitions in Pb1-xBaxZrO3 ceramics:  Effect of PbO content”. Appl. Phys. Lett., 92 Art No. 092905 (2008).

P.  Bomlai, P Sinsap, S Muensit, S J Milne. “Effect of MnO on the phase development, microstrues, and dielectric properties of 0.95Na(0.5)K(0.5)NbO(3)-0.05LiTaO(3)”. J. Am. Ceram. Soc, 91 624-627 (2008).

P. Bomlai, S. Muensit,  S J Milne. ‘ Phase transition behaviour and dielectric properties of Na0.5K0.5NbO3-LiTaO3-LiSbO3 lead-free piezoceramic’ Science Asia 35, 261-267, (2009)

A Chowdhury, S O'Callaghan, T A Skidmore, C James, S J Milne.  ‘Nanopowders of Na0.5K0.5NbO3 Prepared by the Pechini Method’.  J. Am. Ceram. Soc., 92, 758-761 (2009)

P. Bomlai, N Sirikulrat, A P Brown, E Condliffe, S J Milne. Compositional analysis and electrical properties of Sb, Mn-doped barium strontium titanate PTCR ceramics with TiO2 and SiO2 sintering additives.  J. Mat. Sci. 42, 2175-80 (2007).

P.  Bomlai, S J Milne ”Properties of barium-strontium titanate PTCR ceramics sintered on different powder beds”.  J. Mat. Sci. 42, 6803-8 (2007).

P.  Bomlai, P Wichianrat, S Muensit, S J Milne. “Effect of calcination conditions and excess alkali carbonate on the phase formation and particle morphology of Na0.5K0.5NbO3 powders”.  J. Amer. Cer. Soc. 90, 1650-5 (2007).

ZnO Varistors

W Onreabroy,  N Sirikulrat,  A P Brown, C Hammond, S J Milne. “Properties and intergranular phase analysis of a ZnO-CoO-Bi2O3 varistor”.  Solid State Ionics, 177, 411-20 (2006).

PTC Thermistors

P Bomlai, N Sirikulrat, A P Brown, S J Milne. “Effects of TiO2 and SiO2 additions on phase formation, microstructures and PTCR characteristics of Sb-doped barium strontium titanate ceramics”.  J. Eur. Cer. Soc. 25, 1905-18 (2005)

Laser Transfer Processing

C W James; T Comyn;  RA Dorey,  D Underhill, S J Milne. ‘Laser-transfer processing of functional ceramic films’. J Eur Cer Soc 30 419-422 (2010)

C James,  T Chakraborty, A Brown, T Comyn, R Dorey, J Harrington,  A J Laister, R E Miles, C  Puchmark,  B Xu,  R E Miles, W Z Xiong, S J Milne. ‘Laser transfer processing for the integration of thin and thick film ferroelectrics’ J. Mater. Sci. 44 5325-5331 (2009)