A New Capillary‐Type Closed Viscometer for Molten Salt Research

Abstract

A new capillary‐type closed viscometer is described that can be used for many kinds of liquids. The viscometer is of simple design, incorporating a transparent measuring section and a suspended level enabling a flow of liquid under a constant mean hydrostatic head, the value of which is not affected by the total volume of liquid in the instrument. The viscometer is especially suitable for precise measurements with liquids having high vapor pressures, strongly corrosive properties, or showing chemical reactions with the atmosphere. As the viscometer has been used in molten salt research, a short description of the high temperature furnace, which involves an automatic optoelectronic device for recording the efflux time of the liquid, is also given. After a series of calibration experiments with molten KNO3 , the viscosity of molten CdCl2 was determined in the temperature range 590°–800°C. Experimental results are given and compared with literature data.

Density, Electric Conductivity, and Viscosity of Several N‐Alkylpyridinium Halides and Their Mixtures with Aluminum Chloride

“…V~scosity measurements.~A closed capillary, suspended level, all-glass viscometer, similar in design to that described by van Os and Ketelaar (19) was employed. The capillary diameter was such that flow times ranged between 140 and 450 sec.…”