Ultrasound Characteristics in High-Temperature Fluid

To investigate the ultrasound characteristics in high-temperature (over 1000 °C) viscous fluid such as molten glass, we developed an experimental apparatus. This apparatus consists of an electric furnace, a glass container and a transducer employing buffer rod with a cooling jacket to use room-temperature ultrasonic transducers. An ultrasonic velocity and its attenuation in molten glass are measured using the pulsed echo method. To derive the desired echoes, the buffer rod with grooves and cross-correlation analysis are applied.