CYLINDER PRESSURE SENSOR USING AL-SUBSTITUTED LGS SINGLE CRYSTAL AS PIEZOELECTRIC ELEMENT

PROBLEM TO BE SOLVED: To provide a small-sized inexpensive cylinder pressure sensor of simple structure capable of dispensing with a cooler. SOLUTION: The problem is solved by using, as a piezoelectric element, any of LGAS, LNGA and LTGA wherein Ga (gallium) is substituted with Al (aluminum) to redu...

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Bibliographische Detailangaben
Hauptverfasser:	IGUCHI YOKO, UCHIDA TAKEMI, YOKOYAMA HIROSHI, IGUCHI KATSUHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR CHEMISTRY CRYSTAL GROWTH ELECTRICITY MEASURING MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE METALLURGY PHYSICS PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH TESTING UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a small-sized inexpensive cylinder pressure sensor of simple structure capable of dispensing with a cooler. SOLUTION: The problem is solved by using, as a piezoelectric element, any of LGAS, LNGA and LTGA wherein Ga (gallium) is substituted with Al (aluminum) to reduce an amount of the Ga, and a change of a specific resistance value of the crystal is kept within 1011Ω even at 500 °C or more. For example, Ga5is substituted with Ga4.8and Al0.2to form La3Ga4.8Al0.2SiO14, and the amount of the Ga is reduced thereby, in the single crystal of the LGAS. COPYRIGHT: (C)2006,JPO&NCIPI