Purity

 99.99%

Color

Light Brown

Crystal Struture

Tetragonal

Lattice Constant

a = b = 3.756 A   C = 12.636 A

Density

 5.92 g / cc

Melt Point

1650 ^oC

Thermal Expansion Coeff.

12 ppm / ^oC

Dielectric Constant 

16.81 at a axis 20.02 at c axis

Properties/Crystal

SrTiO3

LaAlO3

SrLaAlO4

Structure

Cubic

Rhombohedral at 25 ^oC
   Cubic at > 435 ^oC            

Tetragonal

Lattice Constant

a=3.905

a=3.821 A

a=b=3.756 A     c= 12.636

mismatch to YBCO (a=3.9)

+0.12%

-2.0%

-3.7%

Dielectric Constant

~300

~ 25 

~ 17

Grown Method

Vernuil

CZ

CZ

Thermal expansion

10.4 (x10^-6/ ^oC)

10 (x10^-6/ ^oC)

12 (x10^-6/ ^oC)

Melting point

2080

2080 ^oC        

1650 ^oC

Density

5.175 g/cm³

6.52 g/cm³

5.92 g/cm³

Max. Crystal Size

30 mm dia.

75 mm dia

35 mm dia

Wide rocking curve due to dislocation density

Visible  twin due to phase transition around 400 oC

Narrow  rocking curve, no twins, less defects

Higher

Lower

Medium

Other Crystal Wafer A-Z

Plasma Cleaner

 Wafer Containers

Dicing Saw

Film Coater