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    Special Glass
    Zero Expansion Glass Ceramic
    Zero Expansion Glass Ceramic

      The main components of zero expansion glass ceramic are Li2O, Al2O3 and SiO2;β-quartz solid solution as main crystalline phase formed after strictly controlled crystallization process.

      We supply LW1 zero expansion glass ceramic. It is the preferred material for precision optical components such as laser gyroscope cavity, astronomic telescope glass blanks, astronomical spectrograph and radome. It has various extraordinary properties, including:

    -High mechanical strength

    -Good thermal expansion and thermal shock resistance

    -High chemical resistance

    - Low dielectric loss

    -Excellent electric insulativity


      CDGM zero expansion glass ceramic is available in the form of strips, blocks and cut blanks.

    Supply forms:

    Dimensions: (mm)

    Strips: L(length)×D(width)×H(thickness)

    D≤250,H≤100

    Square blocks: L(length)×D(width)×H(thickness)

    L、D≤800,H≤150

    Large dimension blocks: Ф(diameter)×H(thickness)

    Ф≤1000,H≤150

    cut blanks

    upon request of customers

     


    Thermal properties


    LW1

    α0/50(×10-7/)

    0±0.5×10-7/

    0±1.0×10-7/

    Thermal conductivity(W/m·K)20

    1.483

    Thermal diffusivity (×106m2/s)20

    0.786

    Thermal capacity (J/g·K)20

    0.75

    Mechanical properties

    Young modulus (GPa) 20

    90.67

    Poisson ratio

    0.246

    Knoop hardness(107Pa)

    626

    Density (g/cm3)

    2.54


    Product pictures
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