Microstructural Development in SnO2-Doped ZnO-Bi2O3Ceramics

Autor:	Aleksander Rečnik, Slavko Bernik, Drago Kolar, Nina Daneu
Rok vydání:	2000
Předmět:	Materials science Doping Mineralogy Varistor Sintering Microstructure Grain growth Transmission electron microscopy visual_art Phase (matter) Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Composite material
Zdroj:	Journal of the American Ceramic Society. 83:3165-3171
ISSN:	1551-2916 0002-7820
DOI:	10.1111/j.1151-2916.2000.tb01699.x
Popis:	The effects of adding small quantities of SnO2 to the basic ZnO–Bi2O3 varistor composition were studied in terms of phase reactions, microstructural development, and the formation of inversion boundaries. Scanning and transmission electron microscopy studies showed that the inversion boundaries, triggered by the addition of SnO2, cause anisotropic grain growth in the early stages of sintering. ZnO grains that include inversion boundaries grow exaggeratedly, at the expense of normal grains, until they dominate the microstructure. Higher additions of SnO2 lead to an increase in number of grains with inversion boundaries and to a more fine-grained microstructure. The increasing amount of secondary phases is also related to a higher level of SnO2 addition; however, the influence of these phases on ZnO grain growth is subordinate to the role of inversion boundaries.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::04664bf7a1627bd2127fda321d67c976 https://doi.org/10.1111/j.1151-2916.2000.tb01699.x Zobrazit plný text záznamu