くすべの機構について (I)

概要

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The thermal efficiencies of the kilns for firing the smoked-tiles are generally lower than that of the kilns which are used for the other ceramic products. The main cause in these lower thermal efficiencies of these kilns is found largely in the process of smoking or blueing. For that reason the consideration about the mechanism of smoking must be given.In this paper, the author has investigated the processes of smoking generally in use to-day by the use of the gas analysis in a test tube furnace. And the results obtained are as follows:(1) The “smoking” is a vapor phase cracking at the heated surfaces of the stock at 850° to 1000°C. Which is a natural transition to the pyrogenetic decomposition of the liquid products of the destructive distillation of wood accompanied by the formation of large amounts of coke and gas.(2) The liquid products of the destructive distillation of wood play the chief part in “smoking”, and the gaseous products play one of the useful diluents.
社団法人日本セラミックス協会の論文