Structure and dielectric properties of yttrium-doped Ca0.28Ba0.72Nb2O6 ceramics

Autor: Harry Peirson, Juncheng Pan, Yizhe Li, David A. Hall, Andy P. Brown, Rik M. Drummond-Brydson, Steven J. Milne

Publikováno v: Peirson, H, Pan, J, Li, Y, Hall, D A, Brown, A P, Drummond-Brydson, R M & Milne, S J 2023, ' Structure and dielectric properties of yttrium-doped Ca 0.28 Ba 0.72 Nb 2 O 6 ceramics. ', Journal of Alloys and Compounds . https://doi.org/10.1016/j.jallcom.2023.169891

An unfilled tungsten bronze-structured ferroelectric ceramic, Ca0.28Ba0.72Nb2O6 (CBN28), has been doped with Y3+ to produce ceramics with a nominal composition, (Ca0.28Ba0.72)1-3w/2YwNb2O6 [0 ≤ w ≤ 0.05]. The substitution of Y3+ for Ca2+/Ba2+, an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad0c73422891591170ae1f00dc2266c9
https://doi.org/10.1016/j.jallcom.2023.169891

New high temperature dielectrics: Bi-free tungsten bronze ceramics with stable permittivity over a very wide temperature range

Autor: David A. Hall, Zabeada Aslam, Stuart Micklethwaite, Thomas Brown, Thomas E. Hooper, Yizhe Li, Andy Brown, Steven J. Milne

Publikováno v: Brown, T, Brown, A P, Hall, D A, Hooper, T E, Li, Y, Micklethwaite, S, Aslam, Z & Milne, S J 2020, ' New High Temperature Dielectrics: Bi-free tungsten bronze ceramics with stable permittivity over a very wide temperature range ', Journal of the European Ceramic Society . https://doi.org/10.1016/j.jeurceramsoc.2020.10.034

High relative permittivity, er, over a very wide temperature range, −65 °C to 325 °C, is presented for ceramics designed to be compatible with base metal electrode multilayer capacitor manufacturing processes. We report a ≥ 300 °C potential Cl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::029dcceccd6693179ee5588e6a428ac3
https://doi.org/10.1016/j.jeurceramsoc.2020.10.034

Phase and morphology evolution of (Na1-xKx)NbO3 powders related to calcinations and K2CO3 content

Autor: Steven J. Milne, Winai Saengchote, Supasarote Muensit, Pornsuda Bomlai

Publikováno v: Songklanakarin Journal of Science and Technology (SJST), Vol 29, Iss 2, Pp 441-448 (2007)

Sodium-potassium niobate ((Na1-xKx)NbO3) powders with x = 0.2, 0.4, 0.6 and 0.8 were prepared following the conventional mixed oxide method and characterized by TG-DTA, XRD and SEM techniques.The effects of calcination temperature, dwell time and K2C

Externí odkaz: https://doaj.org/article/0526eb5b7bb549ce89dd876dafe3f7e0

Nanoscale compositional segregation and suppression of polar coupling in a relaxor ferroelectric

Autor: Steven J. Milne, Teresa Roncal-Herrero, John Harrington, Aurang Zeb, Andy Brown

Publikováno v: Acta Materialia. 158:422-429

A number of relaxor ferroelectric ceramics have been demonstrated to possess a near stable value of relative permittivity over very wide temperature ranges. This cannot be explained by conventional theories of relaxors. One such system is based on th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::085a44bb7ffa7d7eb31d5be096151c89
https://doi.org/10.1016/j.actamat.2018.07.053

Dielectric stability in the relaxor: Na0.5Bi0.5TiO3-Ba0.8Ca0.2TiO3-Bi(Mg0.5Ti0.5)O3- NaNbO3 ceramic system

Autor: Aurang Zeb, Steven J. Milne

Publikováno v: Ceramics International. 44:7663-7666

Ceramics with temperature-stable dielectric characteristics have been developed in the system: 0.6[0.85Na 0.5 Bi 0.5 TiO 3 -(0.15-x)Ba 0.8 Ca 0.2 TiO 3 -xBi(Mg 0.5 Ti 0.5 )O 3 ]−0.4NaNbO 3 , x ≤ 0.15. Dielectric measurements exhibited relaxor fer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f44ae4c2619a33675ed3c29d0a76cdf3
https://doi.org/10.1016/j.ceramint.2018.01.191