GSGG Crystals


  • Composition: (Gd2.6Ca0.4)(Ga4.1Mg0.25Zr0.65)O12
  • Crystal Structure: Cubic: a =12.480 Å
  • Molecular wDielectric constanteight: 968,096
  • Melt Point: ~1730 oC
  • Density: ~ 7.09 g/cm3
  • Hardness: ~ 7.5 ( mohns)
  • Refractive index: 1.95
  • Dielectric constant: 30
  • Product Detail

    Technical parameters

    GGG/SGGG/NGG Garnets are used for liquid epitaxy.SGGG subatrates is dedicated substrates for magneto-optical film.In the optical communication devices,require a lot of using 1.3u and 1.5u optical isolator,it's core component is YIG or BIG film been placed in a magnetic field. 
    SGGG substrate is excellent for growing bismuth-substituted iron garnet epitaxial films,is good material for YIG,BiYIG,GdBIG.
    It's good physical and mechanical properties and chemical stability.
    Applications:
    YIG,BIG epitaxy film;
    Microwave devices;
    Substitute GGG

    Properties:

    Composition (Gd2.6Ca0.4)(Ga4.1Mg0.25Zr0.65)O12
    Crystal Structure Cubic: a =12.480 Å ,
    Molecular wDielectric constanteight 968,096
    Melt Point ~1730 oC
    Density ~ 7.09 g/cm3
    Hardness ~ 7.5 ( mohns)
    Refractive index 1.95
    Dielectric constant 30
    Dielectric loss tangent (10 GHz) ca. 3.0 * 10_4
    Crystal growth method Czochralski
    Crystal growth direction <111>

    Technical Parameters:

    Orientation <111> <100> within ±15 arc min
    Wave Front Distortion <1/4 wave@632
    Diameter Tolerance ±0.05mm
    Length Tolerance ±0.2mm
    Chamfer 0.10mm@45º
    Flatness <1/10 wave at 633nm
    Parallelism < 30 arc Seconds
    Perpendicularity < 15 arc min
    Surface Quality 10/5 Scratch/Dig
    Clear Apereture >90%
    Large Dimensions of Crystals 2.8-76 mm in diameter