LITHIUM TANTALATE CRYSTAL 　　 APPLICATION: SURFACE ACOUSTIC WAVE DEVICE BULK ACOUSTIC WAVE DEVICE LEAKY SURFACE ACOUSTIC WAVE DEVICE PIEZOELECTRIC TRANSDUCER PIEZOELECTRIC SENSOR 2.LITHIUM TANTALATE CRYSTAL CRYSTLE INGOT AND WAFER PARAMETER UNIT FIGURE CRYSTLE CLASS 　 TRIGONAL POINT GROUP 　 3m SPACE GROUP 　 R3c LATTICE PARAMETER nm a 0.5154 c 1.3781 MELING POINT c 1650 DENSITY g/cm3 7.46 CURIE TEMP c ~1650 HARDNESS Mohs 5.5 Dielectric Constant 　 e11/e0 51.7 e33/e0 44.5 Elastic Stiffness Coefficient X1011N/m2 Ce11 2.33 Ce33 2.77 Piezoelectric Strain Constant X10-11C/N D22 2.4 D33 0.8 CUT TYPE Vs(m/s) KS2 TCV(10-6/c) TCD(10-6/C) X-112 Y 3295 0.75 -16.5 22.3 Y-X 3230 0.66 　 35 　 PARAMETER NORM UNIT TYPIC DIAMETER D40+/-2 D50+/-2 D76+/-2 Mm TYPICAL LENGTH 100 80 65 Mm TYPIC 36 Y,X,Z 　 REF FLAT ORIENTATION X OR Y 　 　 PARAMETER NORM UNIT TYPIC DIAMETER D42 D50 D76+/-2 　 Mm TYPIC THICKNESS 0.2~0.5 Mm TYPIC ORIENTATION 127.86Y,64Y,47.5Y,Y,Z 　 FRONT SIDE POLISH 0.26~0.016 Um BACK SIDE LAPPING 10-15 Um FLATNESS 15 20 25 UM BOW 15 20 25 UM 　 APPLICATION: SURFACE ACOUSTIC WAVE DEVICE BULK ACOUSTIC WAVE DEVICE LEAKY SURFACE ACOUSTIC WAVE DEVICE PIEZOELECTRIC TRANSDUCER PIEZOELECTRIC SENSOR