Piezoelectric element and method for driving the same

摘要

PCT No. PCT/JP96/01516 Sec. 371 Date Dec. 8, 1997 Sec. 102(e) Date Dec. 8, 1997 PCT Filed Jun. 5, 1996 PCT Pub. No. WO96/39722 PCT Pub. Date Dec. 12, 1996A piezoelectric element characterized by comprising a piezoelectric crystal which has a crystal structure around the crystal phase boundary of tetragonal and rhombohedral (MPB) in a specific temperature range and at least most of which phase-transits to tetragonal when heated to a temperature range higher than the above specific temperature range, and a method for driving the piezoelectric element in a temperature range not lower than the above specific temperature range.