Low Frequency Vibration-Cutting (LFV) is a new machining technology developed to improve the turning process. Vibration applied to the feed drive in the feed direction can be synchronized with the rotation spindle. This technology has the significant feature of discharging the chips intermittently, because it has “air-cutting” times during cutting.
Using a piezoelectric single crystal having a piezoelectric performance to high temperature, it has been developed combustion pressure sensor for measuring the combustion pressure of the internal combustion engine directly. In this paper, the measurement of the compressive strength of Ca2Al2SiO7 (CAS), one of the piezoelectric single crystal of a candidates for the combustion pressure sensor, and we confirmed the compressive strength improvement by element substitution of Ca to Sr, SrCaAl2SiO7 (SrCAS).