Dynamic viscosity of liquid cesium at different temperatures

Dynamic viscosity of liquid cesium at different temperatures

Junjie Chen

Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China

Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com

This silvery metal with a golden cast is the most reactive and one of the softest of all metals. It melts just above room temperature. It is about half as abundant as lead and 70 times as abundant as silver. The primary difficulty associated with the production of pure cesium is that cesium is always found together with rubidium in nature and is also mixed with other alkali metals. Because cesium and rubidium are very similar chemically, their separation presented numerous problems before the advent of ion-exchange methods and ion-specific complexing agents such as crown ethers. Once pure salts have been prepared, it is a straightforward task to convert them to the free metal. Cesium metal is produced in rather limited amounts because of its relatively high cost. Cesium has application in thermionic power converters that generate electricity directly within nuclear reactors or from the heat produced by radioactive decay. Cesium is difficult to handle because it reacts spontaneously in air. If a metal sample has a large enough surface area, it can burn to form superoxides. Cesium superoxide has a more reddish cast. Cesium is the most electropositive and most alkaline element, and thus, more easily than all other elements, it loses its single valence electron and forms ionic bonds with nearly all the inorganic and organic anions. Rubidium and cesium are miscible in all proportions and have complete solid solubility.

Temperature (degrees Celsius), Dynamic viscosity (grams per meter per second)

50                               0.598

100                             0.469

150                             0.389

200                             0.334

250                             0.294

300                             0.264

350                             0.24

400                             0.221

450                             0.206

500                             0.192

550                             0.181

600                             0.171

650                             0.163

700                             0.156

750                             0.149

800                             0.143

850                             0.138

900                             0.134

950                             0.129

1000                                  0.125

1050                                  0.122

1100                                  0.119

1150                                  0.116

1200                                  0.113

1250                                  0.11

1300                                  0.108

1350                                  0.106

1400                                  0.104

1450                                  0.102

1500                                  0.1

1550                                  0.098

1600                                  0.097

1650                                  0.095

1700                                  0.094

1750                                  0.092

1800                                  0.091

1850                                  0.090

1900                                  0.089

1950                                  0.088

2000                                  0.086

Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China