DocumentCode :
2092832
Title :
Microbalance sensor applications using the piezoelectric crystal material GaPO4
Author :
Krispel, F. ; Reiter, C. ; Schauperl, R. ; Mannelli, I. ; Wallnofer, W.
Author_Institution :
Piezocryst Gesellschaft fur Piezoelektr. Technol. mbH, Graz
fYear :
2004
fDate :
5-7 April 2004
Firstpage :
565
Lastpage :
568
Abstract :
Gallium phosphate, GaPO4, is a piezoelectric crystal material homeotypic to quartz which features outstanding thermal stability up to 970degC, higher coupling than quartz and good temperature compensation for resonant applications. We report results in the research and development for high- temperature micro balance including thermo gravimetric analysis and for affinity sensor applications in aqueous liquids, such as biosensors. A sensor head for high-temperature micro balance applications with an integrated heater was developed. The clamping and heating device for the GaPO4 resonator was designed for mechanical stability, reliable contacting and homogeneous temperature distribution. Cycles up to 600degC allow separation of volatile and fixed parts of layers deposited on the resonator surface and pyrolytic cleaning from carbonaceous residues. Another interesting field is the application of GaPO4 for affinity measurements in liquids, e.g. for biosensors. An optimized crystal cut was developed and tested which allows temperature compensation in contact with an aqueous solution. A flow cell with a design for better reproducibility was constructed.
Keywords :
crystal resonators; electric sensing devices; gallium compounds; mechanical stability; microbalances; microsensors; piezoelectric devices; piezoelectric materials; thermal analysis; thermal stability; GaPO4; aqueous solution; carbonaceous residues; clamping; flow cell; gallium phosphate; heating device; high-temperature microbalance sensor; homogeneous temperature distribution; integrated heater; mechanical stability; piezoelectric crystal material; piezoelectric resonator; pyrolytic cleaning; sensor head; temperature 600 degC; temperature 970 degC; temperature compensation; thermal stability; thermogravimetric analysis; GaPO4; affinity sensor; high temperature; micro balance; thermo gravimetric;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Frequency and Time Forum, 2004. EFTF 2004. 18th European
Conference_Location :
Guildford
ISSN :
0537-9989
Print_ISBN :
0-86341-384-6
Type :
conf
Filename :
5075018
Link To Document :
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