制酸剤(ケイ酸マグネシウム)の結合性の持続性に及ぼす影響

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The present paper is concerned with the effects upon durability, of the bond of antacid, magnesium silicate. On the correlation between the durability and structure of antacids, Armstrong et al. reported that the more amorphous magnesium silicate was the more durable it was. Scarecely, however, have studies been made yet upon the kind of factors for durability such as the interaction, bonding state and surface chemistry between silica and magnesia. In the antacid activity test, magnesium silicate showed variation from the theoretical HCI consumption quantity, and this variation was considered to be directly connected with durability. The authors paid special attention to the bond between silica and magnesia as an important factor, and conducted measurements of the differential thermal analysis, IR-ray absorption, X-ray diffraction and surface area with the samples differing in calcining temperature and composition, and also with the comparative specimens (silica-magnesia mixture). On the other hand, studies were conducted on the kinetics of the antacid activity test, irreversible adsorption and exchange reaction of H36Cl gas over the surface of the samples, in order toexamine the mechanism and structure of indicating durability. It is concluded that the durability is influenced by the weak bonding nature between silica and magnesia especially in the region of, in the stable state.
社団法人日本材料学会の論文