Abstract
was previously found by us that microcrystals belonging to the hexagonal crystal system played a role of catalytic action in the oxidation of normal hydra carbons at low temperature. The formaldehyde produced in the oxidation was detected. by spectroscopic observation. By this catalytic action the mechanism of the oxidation, the anti-knocking effect of tetraethyl lead, the method of knocking prevention in combustion engines and the microcrystal nature of glass surface were studied. The results obtained were announced in the previous reports (I) and (II).
The microcrystal nature of mica and porcelain were also examined by the catalytic action. The nature was observed remarkably in the case of glass, while it was not so in the cases of mica and porcelain. The electrical conductivity due to the adsorption of water vapour was also studied for body surfaces of these materials. In the case of glass the conductivity was especially large as compared with that in the remaining cases. This was explained by the conduction with ions produced in chemically adsorbed water, for the chemical adsorption was considered to rise on the glass surface having the nature of hexagonal microcrystal.
The effects given when the combustion chambers were coated with copper or tin had already been examined by a technian, Miyazaki. The results obtained by him are also described in this report.
