Zobrazeno 1 - 10
of 88
pro vyhledávání: '"E. Kashchieva"'
Publikováno v:
Key Engineering Materials. 538:233-237
Bismuth-titanate ceramics containing SiO2and Nd2O3as additives are synthesized by melt quenching method in the system Bi2O3-TiO2-Nd2O3-SiO2at temperature 1450 oC. By X-ray diffraction analysis are determined the crystal phases participating in the ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3656a17e44bcbb61707596bea14c6cfd
https://doi.org/10.4028/www.scientific.net/kem.538.233
https://doi.org/10.4028/www.scientific.net/kem.538.233
Publikováno v:
Processing and Application of Ceramics, Vol 6, Iss 3, Pp 117-122 (2012)
Bismuth-titanate ceramics containing SiO2 and Nd2O3 as additives are synthesized by melt quenching method in the system Bi2O3-TiO2-Nd2O3-SiO2 in the temperature range of 1250-1500 ?C. The phase composition of the obtained materials is determined by X
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e026c4057f8a049f09dc4002f4f65efa
https://doi.org/10.2298/pac1203117s
https://doi.org/10.2298/pac1203117s
Publikováno v:
Journal of Non-Crystalline Solids. 356:1526-1529
This paper discusses the microstructure and stability of medieval glass bracelets from 11th–13th cent. AD excavated in Drastar Castle, Bulgaria. All considered fragments represent high-magnesia soda–lime–silica glasses. Their chemical compositi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d658297c2638b4f9680df14db2bada03
https://doi.org/10.1016/j.jnoncrysol.2010.04.023
https://doi.org/10.1016/j.jnoncrysol.2010.04.023
Publikováno v:
Processing and Application of Ceramics, Vol 3, Iss 3, Pp 125-130 (2009)
In the present work the results of the research on the sol-gel synthesis and structure of cordierite (2MgO·2Al 2 O 3 ·5SiO 2 ), tialite (Al 2 O 3 ·TiO 2 ) and cordierite/tialite glass-ceramics as well cordierite containing 2 wt.% of Co and Co+Cu h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::282d72e6aec70386cbc5183e6406f320
Autor:
Georgi Chernev, A. Wu, Bisserka Samuneva, Lyudmila Kabaivanova, E. Emanuilova, E. Kashchieva, Maria Helena Fernandes, Isabel M. Miranda Salvado, P. Djambaski
Publikováno v:
Journal of Sol-Gel Science and Technology. 48:73-79
In this work the research results on the sol–gel synthesis and structure of silica nanocomposites, containing carrageenan and their application as carriers for cell immobilization were described. The samples were prepared at room temperature by rep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9cd32e2d155d31ece77d74c22da5f30
https://doi.org/10.1007/s10971-008-1799-8
https://doi.org/10.1007/s10971-008-1799-8
Autor:
E. Kashchieva, Plamen Stefanov, Maria Milanova, Hiroshi Funakubo, Nikolay A. Grozev, T. Kamo, D. Todorovsky, Salzitsa Anastasova
Publikováno v:
Applied Surface Science. 254:1545-1558
The results reported concern the characterization of thin layer SiO 2 -based matrices with an oxygen sensing component Ru(II)-tris(4,7-diphenyl-1,10-phenanthroline) immobilized, when a sol–gel process along with dip- and spin-coating deposition met
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf62365f28dfff03a3dbf891b6a49590
https://doi.org/10.1016/j.apsusc.2007.07.090
https://doi.org/10.1016/j.apsusc.2007.07.090
Autor:
Isabel M. Miranda Salvado, Maria Helena Fernandes, Lyudmila Kabaivanova, Aiying Wu, E. Emanuilova, Georgi Chernev, Peter Djambaski, Bisserka Samuneva, E. Kashchieva
Publikováno v:
Journal of Non-Crystalline Solids. 354:733-740
The present paper deals with the influence of the main silica precursors and the type and quantity of organic components (HEMA, PEO and chitin) on the structure of hybrid materials and their applicability for microbial cell immobilization. The sol–
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c015656a0c0ccca4d7811a7d86915d27
https://doi.org/10.1016/j.jnoncrysol.2007.07.094
https://doi.org/10.1016/j.jnoncrysol.2007.07.094
Autor:
Barbara Malič, Luminita Predoana, Liliana Pavlova, Irena Mihailova, Maria Zaharescu, Bisserka Samuneva, Lachezar Radev, E. Kashchieva
Publikováno v:
Processing and Application of Ceramics. 2:103-108
LaCoO3 powders are studied because they exhibit interesting electrical, magnetic and catalytic properties. In this paper, new synthesized La2O3-CoO-SiO2 powders with different quantity of silica were prepared via solgel method in aqua media, starting
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ccca0abdaefe10312dd565584f039fb3
https://doi.org/10.2298/pac0802103r
https://doi.org/10.2298/pac0802103r
Publikováno v:
Journal of Materials Science. 42:3378-3382
The aim of the present investigation is to establish the appropriate routе of nanoparticles formation during heat treatment of selected selenite glasses. Multicomponent compositions containing SeO2, V2O5, TeO2, MoO3, ZnO and Ag2O have been selected.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28c53fdce014f8aaaadb69db361c2121
https://doi.org/10.1007/s10853-006-0965-z
https://doi.org/10.1007/s10853-006-0965-z
Publikováno v:
Journal of Non-Crystalline Solids. 351:1158-1161
Several structural investigations using diffraction techniques, Raman spectroscopy, nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) have supported the idea that the structure of vitreous B 2 O 3 ( v -B 2 O 3 ) is built up pred
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f8097effdfcc4f38cfc5bf96507555a
https://doi.org/10.1016/j.jnoncrysol.2005.01.030
https://doi.org/10.1016/j.jnoncrysol.2005.01.030