High Bridge Pottery Posted February 13, 2018 Report Share Posted February 13, 2018 For some reason I always assumed black iron oxide sold was FeO because it is black. After some googling people seem to say it is Fe3O4. The only MSDS I can find for black iron oxide says Fe2O3 so not much clarity there. What am I buying? Link to comment Share on other sites More sharing options...
Sputty Posted February 13, 2018 Report Share Posted February 13, 2018 . Link to comment Share on other sites More sharing options...
High Bridge Pottery Posted February 13, 2018 Author Report Share Posted February 13, 2018 Pretty sure you are right, just always thought it was FeO. Always good to be wrong as long as you find out you are wrong Link to comment Share on other sites More sharing options...
dhPotter Posted February 13, 2018 Report Share Posted February 13, 2018 John Britt's Mid-Range glaze book says Red Iron is (Fe2O3) and it will decompose into Black iron (FeO) around cone 6 to 8, a strong flux. Metallic iron is (Fe3O4) and Yellow iron is (Fe2O3H2O). Link to comment Share on other sites More sharing options...
High Bridge Pottery Posted February 13, 2018 Author Report Share Posted February 13, 2018 That's why it's confusing, two types of iron oxide are named black iron oxide. Link to comment Share on other sites More sharing options...
Tyler Miller Posted February 14, 2018 Report Share Posted February 14, 2018 Black Iron oxide is FeO in glaze chem, Fe3O4 in the bag. Hamada expressed a preference for blacksmith scale and that is proper FeO. Hematite: Fe2O3 Wustite: FeO Magnetite: FeO.Fe2O3/ Fe3O4 — a crystal (spinel) of FeO and Fe2O3. Metallic iron is just Fe. Yellow iron oxide: FeO(OH).nH2O Link to comment Share on other sites More sharing options...
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