ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Sr0.48Ba0.24Ca0.28TiO3-based varistor ceramics with an excellent capacitor-varistor multifunctionalcharacteristics (V1mA = 11 ~ 49 ν.mm-1, α = 6.1 ~ 11.3, εr max=3.5×105, tanδmin = 5%) wereprepared using conventional solid method. The effect of oxidation temperature and time on structure andelectrical properties were investigated. The results show that with increasing the oxidation temperaturefrom 800°C to 900°C, the varistor voltage V1mA and non-linearity coefficient α defining varistorcharacteristics increase linearly, while the dielectric constant εr and dielectric loss tanδ decrease linearly.There exists an optimum α value when the specimens were oxidized at 850°C for 3h. This behavior wasexplained through various defect reactions of dopants
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.775.pdf
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