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:
In this work, a sub-micron grained sized (〈500nm) ceramic (〉 92% of theoretical) has beenobtained using nano-sized BaTiO3 powders synthesized through a high-gravity reactive precipitation(HGRP) process. Permittivity of the prepared ceramic is greater than 2500. Also, low change ratio oftemperature in the range of −55°C~ 125°C[removed info] i.e.〈 ±15% renders the ceramic to meet the EIA X7Rcharacteristics. In the ceramic compositions, Dy2O3, BaCO3, CaCO3, MnCO3 and MgO were used asdopants. After being mixed and dry-pressed, the above mentioned compositions in reducingatmosphere (N2 and 5% H2) were sintered at 1210°C−1290°C for 2h, respectively. Experimentalresults show that HGRP BaTiO3 powders have good dielectric properties. The dielectric properties aswell as the microstructure of the ceramic are both sensitive to the change of sintering temperature
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.98.pdf
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