MgAl6O10

MgAl6O10 single crystal is a new substrate material for GaN and ZnO epitaxial growth. MgAl6O10 single crystal belongs to cubic system, the space group is fd-3m (227), the cell parameter a = 7.9780 Å, and its density is 3.585g/cm3. Compared with MgAl2O4 crystal, MgAl6O10 single crystal has smaller thermal expansion mismatch and lattice mismatch with GaN. The thermal expansion mismatch with GaN is 2.2 × 10 − 6 K − 1, lattice mismatch is − 11.5%. In addition, MgAl6O10 single crystal is easier to grow large-size and high-quality crystals because its melting point is lower than that of MgAl2O4 crystal. Experiments show that the luminescence performance of GaN and ZnO devices prepared on MgAl6O10 single crystal substrate is better than that of sapphire.

Uses/Applications

A substrate material for GaN and ZnO epitaxial growth.

Features/Benefits

Compared with MgAl2O4 crystal, MgAl6O10 single crystal has smaller thermal expansion mismatch and lattice mismatch with GaN.
MgAl6O10 single crystal is easier to grow large-size and high-quality crystals because its melting point is lower than that of MgAl2O4 crystal.
Experiments show that the luminescence performance of GaN and ZnO devices prepared on MgAl6O10 single crystal substrate is better than that of sapphire.

  • Crystal Structure

    Hexagonal

    Lattice Constant

    a=4.748Å, c=12.97Å

    Density

    3.98 (g/cm3)

    Melt Point

    2040

    Growth Method

    Czochralski, Kyropoulos

    Mohs Hardness

    9mohs

    Refractive Index

    300K,    c1.762 @630nm

    c1.770 @630nm

    Thermal Expansion

    5.8 ×10-6/K

    Thermal ConductivityW/mK)

    c

    //c


    23℃, 55

    26℃, 60


    77 ,40

    70℃, 41

    Loss Tangent at 293K

    1×10-41MHz

    Dielectric Constant at 103-109Hz @25

    c11.5

    c9.3

    Transmittance

    80@ 400~4000nm

    Orientation

    A-plane

    <11-20>

    2.379 Å


    R-plane

    <1-102>

    1.740 Å


    M-plane

    <10-10>

    1.375 Å


    C-plane

    <0001>

    2.165 Å

    Crystallographic Orientation Tolerance

    ±0.5°

    Regular Size

    10×3mm,10×5mm10×10mm,15×15mm20×15mm20×20mm

    Regular Thickness

    0.5mm1.0mm

    Polishing

    One side or two sides

    Surface Roughness

    Ra<5Å5×5μm

    Package

    Class 100 clean bag, Class 1000 super clean room


  • Regular Size

    10×3mm,10×5mm,10×10mm,15×15mm,20×15mm,20×20mm


    Regular Thickness

    0.5mm,1.0mm