effect of polymorphism of al2o3 on sintering and grain growth of magnesia aluminate spinel

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ID: 229673
2007
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Abstract
The effect of polymorphism of Al2O3 on sintering and grain growth of magnesia aluminate spinel was studied. γ - Al2O3 and α - Al2O3 were mixed with MgO according to the stoichiometric MA ratio, respectively, and pressed into billets with a 20mm diameter and 15mm height, and then were sintered at temperature from 1250ºC to 1400ºC in air atmosphere. Bulk density, apparent porosity and grain size were measured. The results indicated that the grain size of MA with γ-Al2O3 is larger than the grain size of MA with α - Al2O3. This is because the activation energy of grain growth of magnesia aluminate spinel prepared by γ-Al2O3 is lower than that by α -Al2O3, the former is 159KJ/mol and the latter is 217KJ/mol.
Reference Key
z.2007scienceeffect Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Zhihui Z.;Nan L.;Guozhi R.
Journal european romantic review
Year 2007
DOI
10.2298/SOS0701009Z
URL
http://www.doiserbia.nb.rs/img/doi/0350-820X/2007/0350-820X0701009Z.pdf
Keywords
grain growthchemical technology

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