| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Research Abstract |
Zero-CTE temperatures, temperatures at which coefficients of thermal expansion (CTE) become zero, T(zero-CTE), of TiO_2-SiO_2 ultra-low-expansion glasses depend not only on the TiO_2 concentrations C (TiO_2) but also on the fictive temperatures T_f and the OH concentrations C (OH). Calibration lines, viz., interrelationships among T (zero-CTE), C (TiO_2), T_f, C (OH), and acoustic properties (leaky surface acoustic wave velocity, longitudinal velocity, shear velocity, and density), were obtained to evaluate T (zero-CTE) of TiO_2-SiO_2 ultra-low-expansion glasses by the line-focus-beam ultrasonic material characterization system.
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