DESIGN NOTE: A combined unit for viscosity, surface tension and density measurements in oxide melts
Abstract
A combined experimental unit for high-temperature viscosity, density and surface-tension measurements in oxide melts (glasses, metallurgical slags and coal ash) is described. The high-temperature viscometer is based on the Brookfield device whereas the density and surface-tension measurements are based on the maximum-bubble-pressure method. A vertical tube furnace is capable of reaching temperatures up to 0957-0233/8/7/020/img1. An inert (argon) atmosphere allows the use of non-standard, molybdenum spindles for viscosity measurements and permits investigation of melts susceptible to oxidation. The ranges for the measured values are 0.1 - 460 Pa s for viscosity, 0957-0233/8/7/020/img2 for surface tension, and 0957-0233/8/7/020/img3 for density. Since the range of the pressure transducer can be changed for measurements of higher surface tension and density, the experimental unit can also be used for density and surface-tension measurements in liquid metals and mattes. These high-temperature measurements are accurate to within 0957-0233/8/7/020/img4 for viscosity, 0957-0233/8/7/020/img5 for surface tension and 0957-0233/8/7/020/img6 for density.
- Publication:
-
Measurement Science and Technology
- Pub Date:
- July 1997
- DOI:
- 10.1088/0957-0233/8/7/020
- Bibcode:
- 1997MeScT...8..822V