SiO2

Artificial quartz single crystals are grown in autoclaves by hydro-thermal method and with left-handed and right-handed forms. Quartz crystals have a low stress birefringence and a high refractive index uniformity, with a light transmission range of 0.15-4 μm. Quartz crystals, for their piezoelectric properties, low thermal expansion coefficient, excellent mechanical and optical properties, are used in electronic, precision optical and laser technologies, optical communication, X-ray optical.

Uses/Applications

Electronic, precision optical and laser technologies, optical communication, X-ray optical.

Features/Benefits

Quartz crystals have a low stress birefringence and a high refractive index uniformity, with a light transmission range of 0.15-4 μm.
Quartz crystals have good piezoelectric properties, low thermal expansion coefficient, excellent mechanical and optical properties.

  • Growth Method

    Hydro-thermal

    Crystal Structure

    Hexagon

    Lattice Constant

    a=4.914Å    c=5.405 Å

    Melting Point

    1610℃phase transition temperature573.1℃

    Density

    2.684 (g/cm3)

    Mohs Harness

    7 (mohs)

    Specific heat

    0.18 (cal/gm)

    Thermal Conductivity

    0.0033 (cal/cm/ ℃)

    Thermoelectric Constant

    1200 μv/℃300℃

    Refractive Index

    1.544

    Thermal Expansion

    α1113.71×10-6 / K α337.48×10-6 /K

    Q value

    1.8×106 min

    Sound Speed (SAW)

    3160m/sec

    Frequency Constant

    1661kHz/mm

    Pressure Electric Conjugation

    K2(%) BAW: 0.65 SAW: 0.14

    Orientation

    YX or Z cutST  cut , AT cut

    Orientation Tolerance

    +/- 12’/30’

    Dimension

    Φ2″(50.8mm)Φ3″(76.2mm)Φ4″(100mm)±0.2mm
    Primary Orientation Flat16±1.5mm (Φ2″);22±1.5mm (Φ3″) ;32±3.0(Φ4″)

    Thickness

    0.5mm±0.05mm

    Roghness

    <1.0nm (or < 0.5nm)


  • Φ2″(50.8mm)、Φ3″(76.2mm)、Φ4″(100mm)±0.2mm


    Primary Orientation Flat:

    16±1.5mm (Φ2″);22±1.5mm (Φ3″) ;32±3.0(Φ4″)