LITHIUM NIOBATE CRYSTAL R & D DEPARTMENT WORKS FOR SUPPLY RAW MATERIAL SAW DEPT AND ALSO SUPPLY TO CUSTOMER SEMI-PRODUCTS AS FOLLOWING. 1.LITHIUM NIOBATE CRYSTAL CRYSTLE INGOT AND WAFER PARAMETER UNIT FIGURE CRYSTLE CLASS 　 TRIGONAL POINT GROUP 　 3m SPACE GROUP 　 R3c LATTICE PARAMETER nm a 0.5148 c 1.3863 MELING POINT c 1250 DENSITY g/cm3 4.64 CURIE TEMP c ~1160 HARDNESS Mohs 5 Dielectric Constant 　 e11/e0 85 e33/e0 29.5 Elastic Stiffness Coefficient X1011N/m2 Ce11 2.04 Ce33 2.46 Piezoelectric Strain Constant X10-11C/N D22 2.04 D33 19.22 CUT TYPE Vs(m/s) KS2 TCV(10-6/c) TCD(10-6/C) 127.86 Y-X 3970 5.5 -60 78 Y-X 3485 4.3 -85 95 　 PARAMETER NORM UNIT TYPIC DIAMETER D40+/-2 D50+/-2 D76+/-2 Mm TYPICAL LENGTH 300 150 100 Mm TYPIC 127.86Y 64Y Y,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