Morphotropic piezoelectric ceramics

Claim 1

A PIEZOLECTRIC CERAMIC COMPOSITION COMPRISING A SOLID SOLUTION CONSISTING OF THE COMPOUNDS OF: LEAD TITANE, LEAD STANNATE, AND LEAD ZIRCONATE, SAID COMPOUNDS HAVING PROPORTIONS SUCH THAT IF THE PROPORTION OF ONE OF SAID COMPOUNDS WERE CONSISTED FIXED, THE PROPORTIONS OF THE REMAINING TWO COMPOUNDS WOULD BE WITHING ABOUT 10 MOLE PERCENT OF THE MORPHOTROPIC PHASE BOUNDARY OF SAID SOLID SOLUTION, SAID BOUNDARY BEING APPRIXIMATELY DETERMINED BY THE SMOOTH CURVE DRAWN THROUGH THE POINTS OF FOUR BOUNDARY COMPOSITIONS ON A COMPOSITION DIAGRAM OF THE TERNARY SYSTEM LEAD STANNATE-LEAD TITANE-LEAD ZIRCONATE, SAID FOUR BOUNDARY COMPOSITIONS BEING SUBSTANTIALLY AS FOLLOWS: 58 MOLE PERCENT LEAD STANNATE-42 MOLE PERCENT LEAD TITANE, 40 MOLE PERCENT LEAD STANNATE-45 MOLE PERCENT LEAD TITANE-15 MOLE PERCENT LEAD ZIRCONATE, 20 MOL PERCENT LEAD STANNATE-48 MOLE PERCENT LEAD TITANE-32 MOLE PERCENT LEAD ZIRCONATE, AND 46 MOLE PERCENT LEAD TITANATE54 MOLE PERCENT LEAD ZIRCONATE.