000058756 001__ 58756
000058756 005__ 20170831220647.0
000058756 037__ $$aTAZ-TFM-2016-230
000058756 041__ $$aspa
000058756 1001_ $$aLaita Florian, Elisa
000058756 24200 $$aMineral transformations in aluminium-rich clays with firing and their relation with significant properties
000058756 24500 $$aTransformaciones minerales durante los procesos de cocción de arcillas alumínicas y su relación con propiedades físicas de interés
000058756 260__ $$aZaragoza$$bUniversidad de Zaragoza$$c2016
000058756 506__ $$aby-nc-sa$$bCreative Commons$$c3.0$$uhttp://creativecommons.org/licenses/by-nc-sa/3.0/
000058756 520__ $$aMineralogical and textural transformations and changes in physical properties of three shales fired from 800 to 1300ºC have been studied. Initially these samples were formed by variable proportions of illite, pyrophyllite, orthoclase, quartz, kaolinite, mixed layers I/S and organic matter. Raw and fired samples were analysed by X-ray diffraction, transmitted light microscopy, field emission scanning electron microscopy and transmission electron microscopy. Kaolinite, mixed layers I/S and organic matter were destabilized at temperatures below 800°C indicating that they are the least stable phases to the firing process. Illite, pyrophyllite and orthoclase remain until 1000ºC and they show a larger stability field during the ceramic process than in natural environments. Quartz remains during all the firing process, although it is partly replaced by vitreous material. When temperature increases, hematite and mullite crystallize and the vitrification starts from 1000ºC. This vitreous phase is the precursor of mullite. Changes in colour (grey-orange-brown) are due to the loss of organic matter, to the formation of hematite and its subsequent destabilization. Variations in linear contraction, density, total porosity and in average pore size are related to the destabilization of the different phases, the progress of vitrification and the crystallization of mullite.
000058756 521__ $$aMáster Universitario en Geología: Técnicas y aplicaciones
000058756 540__ $$aDerechos regulados por licencia Creative Commons
000058756 700__ $$aBauluz Lázaro, Blanca$$edir.
000058756 7102_ $$aUniversidad de Zaragoza$$bCiencias de la Tierra$$cCristalografía y Mineralogía
000058756 8560_ $$f629846@celes.unizar.es
000058756 8564_ $$s3329125$$uhttps://zaguan.unizar.es/record/58756/files/TAZ-TFM-2016-230.pdf$$yMemoria (spa)
000058756 909CO $$ooai:zaguan.unizar.es:58756$$pdriver$$ptrabajos-fin-master
000058756 950__ $$a
000058756 951__ $$adeposita:2017-01-26
000058756 980__ $$aTAZ$$bTFM$$cCIEN