000109595 001__ 109595
000109595 005__ 20240122154814.0
000109595 0247_ $$2doi$$a10.1016/j.ceramint.2021.02.032
000109595 0248_ $$2sideral$$a123348
000109595 037__ $$aART-2021-123348
000109595 041__ $$aeng
000109595 100__ $$0(orcid)0000-0002-1954-6180$$aLaita, E.$$uUniversidad de Zaragoza
000109595 245__ $$aMineral and textural transformations in mixtures of Al-rich and Al–K-rich clays with firing: Refractory potential of the fired products
000109595 260__ $$c2021
000109595 5060_ $$aAccess copy available to the general public$$fUnrestricted
000109595 5203_ $$aThe present work analyses a set of cylinders manufactured by pressing and fired from 1000 °C to 1270 °C, which are composed of pure Al-rich rocks (bauxite) and mixtures of bauxite with Al–K-rich clays. The aim of the study is to determine the mineral and textural transformations that take place in the mixtures with firing and their influence on the physical properties of the final products in order to evaluate their refractory potential by comparing them with various fired commercial bauxites. To this end, raw and fired samples were analysed by X-ray diffraction, X-ray fluorescence, and optical and field emission scanning electron microscopy, and significant physical properties (e.g. density, linear shrinkage, porosity, colour, water absorption, thermal conductivity and point load resistance) were determined in the fired cylinders. The raw bauxite was mainly formed by boehmite, kaolinite and hematite whereas the illite- and kaolinite-rich clay was formed by quartz, illite and kaolinite. Kaolinite, illite and boehmite are not detected at 1000 °C and, from this temperature upwards, mullite, corundum, ¿-Al2O3, hercynite, ilmenite, cristobalite and vitreous phase are formed. Changes in physical properties with rising temperature are associated with the mineralogical changes. The increases in density and linear shrinkage are related to the formation of vitreous phase and the crystallization of mullite, and correlate with the decrease in porosity, water absorption and thermal conductivity. The changes in the colour of the samples are related to the hematite content at each temperature, whereas the point load resistance is greater with higher corundum content. Both the firing temperature and the clay content play an important role in the refractory potential of the mixtures, since samples mixed with illite- and kaolinite-rich clay present similar properties at lower temperatures to those of the fired commercial bauxites.
000109595 536__ $$9info:eu-repo/grantAgreement/ES/DGA-FEDER/E18-20R-Aragosaurus-Recursos Geológicos y Paleoambientes$$9info:eu-repo/grantAgreement/ES/MCIU/RTI2018-093419-B-100
000109595 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000109595 590__ $$a5.532$$b2021
000109595 592__ $$a0.887$$b2021
000109595 594__ $$a8.0$$b2021
000109595 591__ $$aMATERIALS SCIENCE, CERAMICS$$b3 / 29 = 0.103$$c2021$$dQ1$$eT1
000109595 593__ $$aElectronic, Optical and Magnetic Materials$$c2021$$dQ1
000109595 593__ $$aSurfaces, Coatings and Films$$c2021$$dQ1
000109595 593__ $$aProcess Chemistry and Technology$$c2021$$dQ1
000109595 593__ $$aCeramics and Composites$$c2021$$dQ1
000109595 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000109595 700__ $$0(orcid)0000-0002-4970-6333$$aBauluz, B.$$uUniversidad de Zaragoza
000109595 700__ $$0(orcid)0000-0003-0410-6948$$aMayayo, M.J.$$uUniversidad de Zaragoza
000109595 700__ $$0(orcid)0000-0002-2169-4561$$aYuste, A.$$uUniversidad de Zaragoza
000109595 7102_ $$12000$$2120$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Cristalografía Mineralog.
000109595 773__ $$g47, 10 A (2021), 14527-14539$$pCeram. int.$$tCeramics International$$x0272-8842
000109595 8564_ $$s815289$$uhttps://zaguan.unizar.es/record/109595/files/texto_completo.pdf$$yPostprint
000109595 8564_ $$s2405968$$uhttps://zaguan.unizar.es/record/109595/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000109595 909CO $$ooai:zaguan.unizar.es:109595$$particulos$$pdriver
000109595 951__ $$a2024-01-22-15:35:32
000109595 980__ $$aARTICLE