Structure of hercynite prepared with existence of metal Fe

In this work, raw materials analytically pure Al2O3 and analytically pure Fe2O3 were mixed in FeO: Al2O3 molar ratio of 1 : 1and pressed into specimens. The specimens were embedded in analytically pure metal Fe powders and fired slowly to 1650 oCin air atmosphere, and then soaked at 1650 oC for 5 hr...

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Bibliographic Details
Published inJournal of Ceramic Processing Research, 17(12) pp. 1226 - 1229
Main Authors Junhong Chen, Dongfang Liu, Mingwei Yan, Yong Li, Jindong Su, Bin Li, Jialin Sun
Format Journal Article
LanguageEnglish
Published 세라믹연구소 01.12.2016
Subjects
재료공학
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Summary:In this work, raw materials analytically pure Al2O3 and analytically pure Fe2O3 were mixed in FeO: Al2O3 molar ratio of 1 : 1and pressed into specimens. The specimens were embedded in analytically pure metal Fe powders and fired slowly to 1650 oCin air atmosphere, and then soaked at 1650 oC for 5 hrs. The fired specimens were investigated by XRD, SEM, and EDS. Theresults show that the specimen synthesized at high temperatures in melting Fe is composed of hercynite and wüstite (FenO(n ≤ 1)); FenO disperses in hercynite; hercynite crystals develop well and are mostly perfect octahedron with grain size around50μm. The hercynite has Fe/Al ratio smaller than 1/2, which is non-stoichimetric. With the existence of melting Fe, althoughthe raw materials are theoretically batched according to FeO·Al2O3, FenO is still excess, so the hercynite obtained is Al-rich. KCI Citation Count: 0
ISSN:1229-9162
2672-152X