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Use of aluminum nitride to obtain temperature measurements in a high temperature and high radiation environment

United States Patent

April 26, 2016
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
An aluminum nitride piezoelectric ultrasonic transducer successfully operates at temperatures of up to C. and fast (>1 MeV) neutron fluencies of more than 10.sup.18 n/cm.sup.2. The transducer comprises a transparent, nitrogen rich aluminum nitride (AlN) crystal wafer that is coupled to an aluminum cylinder for pulse-echo measurements. The transducer has the capability to measure in situ gamma heating within the core of a nuclear reactor.
Wernsman; Bernard R. (Jefferson Hills, PA), Blasi; Raymond J. (North Huntingdon, PA), Tittman; Bernhard R. (State College, PA), Parks; David A. (Tulsa, OK)
U.S. Department of Energy (Washington, DC)
14/ 186,244
February 21, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT This invention was made with U.S. Government support under Contract No. DE-NR0000031 awarded by the United States Department of Energy. The U.S. Government has certain rights in the invention.