Preparation and characterization of high purity calcium, strontium and barium

Add time:08/28/2019    Source:sciencedirect.com

The alkaline earth metals calcium, strontium and barium with the highest purities reported hitherto were prepared by metallothermic reduction of their high purity oxides with high purity aluminium in ultrahigh vacuum. The vapour pressure of aluminium at the reduction temperature is considerable (approximately 0.01 mbar), resulting in contamination of the alkaline earth metal condensates. By subsequent ultrahigh vacuum distillation (calcium, 880 °C; barium, 880 °C; strontium, 760 °C) the content of the aluminium impurity was markedly decreased. The high purity metals calcium, strontium and barium were characterized by trace analytical techniques and by the residual resistivity ratio. The trace analytical techniques were standardized chemically.

We also recommend Trading Suppliers and Manufacturers of BARIUM CALCIUM TUNGSTEN OXIDE 99.9% (cas 15552-14-4). Pls Click Website Link as below: cas 15552-14-4 suppliers

Prev:Synthesis and thermionic properties of tungsten–barium titanate composites
Next:Combined experimental and density functional theory (DFT) studies on the catalyst design for the oxidative coupling of methane)