Substrate single crystals

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Single-crystal substrates are characterized by the absence of grain boundaries, a consistently ordered crystal structure and high purity. They are therefore predestined for use as a single crystal for investigating fundamental effects or as a substrate for the deposition of thin layers. The quality of the crystal structure and the best possible formation of atomically smooth terraces on the surfaces are essential for all applications.

Kristall

The standard orientations are (111), (110), and (100) for cubic substrates and (0001), (1010) and (1120) for hexagonal crystals. We are also happy to offer other orientations on REQUEST. The standard accuracy of the orientation of substrate surfaces is < 0.5°. On request, an orientation accuracy of <0.1° is also possible. We are also happy to carry out a one-sided or two-sided polish with EPI quality to ensure a coating with good adhesion.

Kristall

The typical thickness for substrates is 0.5 - 1.0 mm with dimensions of 5 x 5 mm to 10 x 10 mm or Ø 5 - 10 mm diameter for round substrates. Kristall

Below are some examples of the single crystal substrates offered by MaTecK. If you have additional or different requirements, please send us an INQUIRY.

I. Substrate single crystals

CrystalStructureM.P. [°C]Dielectric constantGrowth TechniqueInfo
Al2O3
Sapphire
Hexag.
a=4.77Å
c=13.04Å
2040
9.0/11.5
parallel/perpendicular
C-axis
CZ ?
LaAlO3 Rhombo
a=3.790Å
c=13.11Å
2100 24.5 CZ
ø2"
?
Th:
LaAlO3
Cubic
a=7.57Å
2080 24.0 CZ
ø30mm
?
MgO Cubic 2800 10 ? ?
NdCaAlO4 Tetrag.
a=3.685Å
c=12.12Å
1850 19.5 CZ
ø30mm
NdGaO3 Orthor.
a=5.43Å
b=5.50Å
c=7.71Å
1600 25 CZ
ø2"
?
SrLaAlO4 Tetrag.
a=3.756Å
c=12.63Å
1650 16.8 CZ
ø20mm
SrTiO3 Cubic
a=3.90Å
2080 300 Verneuil
ø20mm
?
YAlO3 Orthog.
a=5.176Å
b=5.307Å
c=7.355Å
1870 16`20 CZ
ø30mm
YSZ Cubic
a=5.41Å
~2500 27 Flux ?

II. Substrate Bi-crystals


Material
SrTiO3MgO Al2O3YSZ Nb:SrTiO3
Dimensions (mm) 10 x 10 x 0.5 10 x 10 x 0.5 10 x 10 x 0.5 10 x 10 x 0.5 10 x 10 x 0.5
Surface Orientation (100) ± 1° (100) ± 1° (1012) ± 1° (100) ± 1° (100) ± 1°
Surface Finish one side polished
Junction Angle 24° ± 1°
36.8° ± 1°
24° ± 1° 24° ± 1° 24° ± 1°
36.8° ± 1°
24° ± 1°
36.8° ± 1°
Flatness l/4 l/4 l/2 l/4 l/4
Surface Roughness Ra 10Å,
Rmax 30Å
Ra 10Å,
Rmax 50Å
Ra 10Å,
Rmax 50Å
Ra 10Å,
Rmax 30Å
Ra 10Å,
Rmax 30Å
Crystal Structure cubic cubic hexagonal cubic cubic
a
Lattice Constant (Å)b
c
3.905
4.213
4.758
12.99
5.139
3.905
Phase Transition tetragonal
< 110K
tetragonal
< 110K
Dielectric Constant (e) 310 10 9 27 310
Coefficient of Expansion (10-6/°C) 11.1 14.2 7.5 10.3 11.1
Melting Point (°C) 2080 2800 2030 2500 2080

Overview of elements with access to our shop

1 18
H
2 13 14 15 16 17
He
Li Be B C
N
O
F
Ne
Na Mg 3 4 5 6 7 8 9 10 11 12 Al Si P S
Cl
Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se
Br
Kr
Rb Sr Y Zr Nb Mo
Tc
Ru Rh Pd Ag Cd In Sn Sb Te I
Xe
Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi
Po
At
Ra
Fr
Ra
Ac
Ce Pr Nd
Pm
Sm Eu Gd Tb Dy Ho Er Tm Yb Lu


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