MnO2 influence on the electrical properties of SnO2-based ceramic systems
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
01/01/2001
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Resumo |
Tin dioxide is an n-type semiconductor that when doped with other metallic oxides exhibits non-linear electric behavior with high non-linear coefficient values typical of a varistor. In this work, electrical properties of the SnO2.CoO.Ta2O5 and SnO2.CoO.MnO2.Ta2O5 ceramics systems were studied with the objective of analyzing the influence of MnO2 on sintering behavior and electrical properties of these systems. The compacts were prepared by powder mixture process and sintered at 1300°C for 1 hour, in air, using a constant heating rate of 10°C/min. The morphological and structural properties were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The densities of the sintered ceramics were measured using the Archimedes method. The SnO2.CoO.Ta2O5 and SnO2.CoO.MnO2.Ta2O5 systems presented breakdown fields (Eb) about 3100 V.cm-1 and 3800 V.cm-1, respectively, and non-linear coefficient (α) about 10 and 20, respectively. |
Formato |
161-165 |
Identificador |
http://dx.doi.org/10.4028/www.scientific.net/KEM.189-191.161 Key Engineering Materials, v. 189-191, p. 161-165, 2001. 1013-9826 http://hdl.handle.net/11449/66435 10.4028/www.scientific.net/KEM.189-191.161 WOS:000168303300027 2-s2.0-0035151590 |
Idioma(s) |
eng |
Relação |
Key Engineering Materials |
Direitos |
closedAccess |
Palavras-Chave | #Alcohols #Ball milling #Electric properties #Manganese compounds #Microstructure #Morphology #Powders #Scanning electron microscopy #Semiconducting tin compounds #Sintering #Varistors #X ray diffraction #Archimedes method #Dense ceramics #Manganese dioxide #Tin dioxide #Ceramic materials |
Tipo |
info:eu-repo/semantics/article |