石英玻璃棒Clear Quartz Rod 具有純度高，耐高溫性強以及熱膨脹系數低的特點，用于單端鹵素燈的壓橋棒、光纖照明、石英纖維的制造以及半導體硅片的加工等。 This clear quartz rod has the characteristics of high purity, heat resistance and low coefficient of thermal expansion. It serves as the material of the bridging rod for single-ended halogen lamps, optical fiber lighting, quartz fiber and semiconductor silicon chip processing, etc.   尺寸公差Dimensional Tolerance 外徑范圍Range of OD 外徑OD ≤6mm ±2.0% 6.00-15.00mm ±1.25% 15.00-20.00mm ±1.25% 20.00-25.00mm ±1.25% 25.00-30.00mm ±1.35% 30.00-50.00mm ±1.5%   化學成份  Chemical composition   單位：Unit : ppm 鉻Cr 鍺Ge 鐵Fe 鎂Mg 鈦T i 鈣Ca 鋁Al 鈉Na 鋰Li 鉀K 羥基OH <0.5 0.5 1.2 0.8 2.0 2.0 20 1.2 0.5 1.5 <25   物理性能：Physical Properties 密度        Density 20℃ kg*m-3(×103) 2.2 熱膨脹系數  Coefficient of expansion 25-300℃ ℃-1(×10-6) 0.56 軟化點      Softening point（℃） 1670 退火點      Annealing point（℃） 1210 變形點      Strain point(℃) 1110 楊氏模量    Youngs modulus(Pa) 7.3×105