1991/01/01 by A.J. Faber, Faber, Anne J., Simonis, Frank +4
Engineering · Materials Science · #660 #Flow Measurement and Analysis #Glass properties and applications #Structural Analysis of Composite Materials
paper · doi:10.34657/14078
openalex publication_date 1991/01/01 · openalex created_date 2016/07/22 · openalex updated_date 2026/07/01
The potential applications of ultrasonic measurements in glass melts have been studied, using a measuring system comprising ultrasonic waveguides of polycrystalline translucent Al2O3. These high-temperature buffer rods serve to transport ultrasonic signals into the glass melt and to receive acoustic echoes generated in the melt, respectively. The fundamental acoustic properties of a soda-lime-silica glass composition as a function of temperature have been obtained experimentally: The observed sound velocity varies from 2.86 km/s at 1150 °C to 2.70 km/s at 1300 °C. The observed attenuation of 1 MHz waves has a minimum at 1300 °C of 840 dB/m. For 100 kHz waves the attenuation is a factor 100 lower. It is concluded that 100 kHz ultrasonic signals can be utilized for detection of bubbles with critical radii (≥ 0.2 mm) in a feeder, for measurement of glass flow velocities and for measurements of glass temperature. For measurement of the residual thickness of refractory bricks of a glass tank, application of echo acoustic sensors an the outer surface of the wall probably is more practical.