The microstructure of inorganic polymers (IP) formed from fayalite slag was investigated as a function of the composition of different activating solutions. The starting slag was 80 wt% amorphous, and after activation using sodium silicate solutions with varying SiO₂/Na₂O molar ratios, the amorphous phase dissolved and a binder phase was formed. The morphology of this binder, including the population and size of remnant particles and pores, was dependent on the particular activating solution used, and became denser as the level of silicate rose. ⁵⁷Fe Mössbauer spectroscopy revealed that the IP synthesis reaction is combined with the oxidation of Fe²⁺ from the fayalite slag to Fe³⁺ in the inorganic polymer binder. The reaction extent varied and could be quantified using the absorption areas of these ions. Data corroborate that the Fe²⁺ ions in the amorphous part of the fayalite slag and the Fe³⁺ ions in the new binder phase had an average oxygen‐coordination number of 5.

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铁橄榄石矿渣制成的无机聚合物：铁的微观结构和行为

研究了由铁橄榄石炉渣形成的无机聚合物（IP）的微观结构，它是不同活化溶液组成的函数。起始炉渣是80wt％的非晶态，并且在使用具有变化的SiO ₂ / Na ₂ O摩尔比的硅酸钠溶液活化之后，非晶态相溶解并且形成了粘结相。该粘合剂的形态，包括残余颗粒和孔的数量和大小，取决于所用的特定活化溶液，并且随着硅酸盐含量的增加而变得更致密。⁵⁷铁穆斯堡尔谱发现该IP合成反应与Fe的氧化组合²⁺从铁橄榄石炉渣成Fe ³⁺在无机聚合物粘合剂中。反应程度各不相同，可以使用这些离子的吸收面积进行量化。数据证实，铁橄榄石炉渣无定形部分中的Fe ²⁺离子和新的粘结相中的Fe ³⁺离子的平均氧配位数为5。