ISSN:
1662-9752
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:
A ceramic thermocouple (CTC) was assembled using SiC as the cathode and MoSi2 as theanode for the temperature test of the aluminum electrolysis. The NiFe2O4 was sprayed on the surfaceof SiC cathode for increasing the corrosion resistance ability in the cryolite. The corrosion behavior ofNiFe2O4 in the cryolite was investigated. The results of the corrosion tests show that the NiFe2O4 hasa very low corrosion rate in the cryolite, and a corrosion layer was formed during the corrosion test.The mechanisms of the NiFe2O4 corrosion are reactive corrosion and particles flaking. The thermoemf of SiC-MoSi2 CTC was tested from 25 ºC to 1300 ºC in air. The results show that thermo emf hasa linear relationship with the temperature dependence, and reached 350 mV at 1300 ºC. The CTCwhich consists of SiC-MoSi2 prepared in the same batch has a preferable interchangeability. Byholding temperature at 1300 ºC, the deviation of thermo emf is 0.5 %, which is better than thecriterion of industry thermocouple, 0.75 %. The CTC response time was also analyzed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.2195.pdf
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