ファイヤライト(Fe_2SiO_4)の生成と還元反応について

概要

論文の詳細を見る
In this work, the rate of formation of fayalite (Fe_2SiO_4) from mixture of ferrous oxide and α-quartz was measured. The influence of various oxide additions on the formation of fayalite was also studied. These synthetized samples were reduced with H_2 or in graphite crucible. The rate of reduction was measured, and reduction products were investigated with X-ray diffraction. The results obtained are as follows : 1) The rate of formation satisfies with JANDER's equation. 2) The formation of fayalite was generally delayed by additions. The stoichiometric molar ratio of FeO/SiO_2 was altered as a result of the reaction of added compounds with FeO and SiO_2. 3) Especially, the formation of fayalite was delayed when magnetite and tridymite co-existed with fayalite as a reaction product. 4) The rate of reduction agrees with MCKEWAN's equation, during the early period of reduction. When the reduction proceeds further with formation of amorphous SiO_2, MCKEWAN's equation was not valid, since fayalite reduction is prevented by amorphous SiO_2. 5) FeO was reduced first in the samples which contain FeO and additions. The rate of reduction of fayalite was influenced little by additions. 6) It is found that fayalite is decomposed into Fe and Fe_<2-x>SiO_<4-y> at the primary stage of reduction. When Fe_<2-x>SiO_<4-y> was reduced further, it changed to amorphous SiO_2 at low temperature, and α-crystobalite at high temperature.
社団法人日本鉄鋼協会の論文
1968-10-01

ファイヤライト(Fe_2SiO_4)の生成と還元反応について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク