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Materials 2014, 7(6), 4773-4788; doi:10.3390/ma7064773
Article

Sintering Behaviour of Waste Olivine and Olivine/Alumina Blends

* ,
 and
Department of Chemistry, Physics and Environment, University of Udine (UNIUD), Via del Cotonificio 108, I-33100 Udine, Italy
* Author to whom correspondence should be addressed.
Received: 23 April 2014 / Revised: 9 June 2014 / Accepted: 10 June 2014 / Published: 20 June 2014
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Abstract

The sintering behaviour of several green compacts made with olivine or olivine/alumina powder blends has been examined. To this goal, powders were attrition milled, uniaxially pressed into specimens and air sintered at temperatures ranging from 1100 to 1300 °C. The resulting samples were characterized by water absorption, shrinkage, phase composition and density. Compositions containing 5%, 10% and 20% Al2O3 have a sintering behaviour similar to that of olivine alone, reaching low residual porosity when fired at 1300 °C. Conversely, the composition containing 40% Al2O3 displays an almost flat shrinkage profile and maintains high residual porosity in the examined temperature range.
Keywords: olivine; alumina; sintering; crystal phases; microstructure olivine; alumina; sintering; crystal phases; microstructure
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Furlani, E.; Aneggi, E.; Maschio, S. Sintering Behaviour of Waste Olivine and Olivine/Alumina Blends. Materials 2014, 7, 4773-4788.

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