Description
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 |
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 |
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Higher |
Lower |
Medium |
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