Magnesia-zircon brick: Evolution of microstructure, properties and performance with increasing sintering temperature | Zendy

Junjie Gao | Zendy; Zixuan Guo | Zendy; Lianjun Wang | Zendy; Wei Jiang | Zendy

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Magnesia-zircon brick: Evolution of microstructure, properties and performance with increasing sintering temperature

Author(s) -

Junjie Gao,

Zixuan Guo,

Lianjun Wang,

Wei Jiang

Publication year - 2013

Publication title -

science of sintering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.309

H-Index - 25

eISSN - 1820-7413

pISSN - 0350-820X

DOI - 10.2298/sos1302181g

Subject(s) - sintering , materials science , microstructure , cubic zirconia , composite material , forsterite , zircon , creep , brick , metallurgy , porosity , mineralogy , ceramic , geology , geochemistry

Depending on phase components and densification, Magnesia-Zircon brick varies in appearance from white to veined and then brown with increasing sintering temperature. Properties including bulk density, apparent porosity and hot modulus of rupture as well as performance embodied with creep resistance and refractoriness continue to improve with sustaining enhancement of sintering temperature. Exceptionally, cold crushing strength first increases then decreases with rising sintering temperature and a peak exists at 1550oC. Microstructural evolution suffers zircon decomposition companying by silica escape, forsterite formation, matrix solidification and zirconia coagulation, until a zirconia/forsterite composites belt tightly coating on magnesia aggregates. Excessive coagulation of zirconia caused by oversintering probably results in microcracks formation and defects enlargement thereby degrades cold crushing strength

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