Abstract
Experiments have been conducted in an electric furnace at atmospheric pressure with the object of investigating the seed arcing characteristics and electrical conductivities of seed materials, and ceramic consumption rates by seed arcing. Many important facts have been clarified from these experiments, namely that the arcing behaviors of molten seeds resemble closely those of mercury in a mercury rectifier, the cathode voltage drop of K 2CO3 seed is close to that obtained for the copper electrode in an MHD channel, the molten seed has an electrical conductivity comparable to those of advanced ceramic electrodes, and so on. These results show that so-called mode molten seed electrodes are highly promising for practical application. The arc mode molten seed cathodes for commercial MHD generating channels are discussed.
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