Typical Physical Properties

Purity   Wt %

Saw grade:  > 99.9     Optical grade: 99.99

Crystal Structure

Hex.     a= 4.914 Å   c = 5.405 Å

Growth Method

Hydrothermal

Hardness

7.0   Moh’s

Density

2.684   g/cm³

Melt Point

1610 ^oC          ( phase transition point: 573.1^oC)

Specific Heat

0.18  cal/gm

Thermoelectric Constant

1200 mV/^oC @ 300 ^oC

Thermal Conductivity

0.0033  cal/cm/ ^oC

Thermal Expansion (x10^-6/ ^oC)

a₁₁: 13.71      a₃₃:  7.48

Index of Refraction

1.544

Q Value

Acoustic Velocity, SAW

Frequency Constant, BAW

Piezoelectric Coupling 

1.8 x 10⁶ min.

3160  ( m/sec  )

1661  ( kHz/mm )

K² (%)   BAW:  0.65       SAW: 0.14       

Inclusion

IEC Grade II