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Boletín de la Sociedad Española de Cerámica y Vidrio
Article . 2021 . Peer-reviewed
License: CC BY NC ND
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The use of perlite as flux in the production of porcelain stoneware tiles

Authors: Kağan Kayacı;

The use of perlite as flux in the production of porcelain stoneware tiles

Abstract

In this study, the effect of perlite from NW Turkey on the physical properties of ceramic tile bodies was investigated. The phases present in the raw materials were measured by X-ray diffraction while chemical analysis of the raw materials were determined by X-ray flouresence. Colour, water absorption and firing shrinkage of the raw materials were investigated. The data obtained from this study showed that the addition of NW Turkey perlites improved sintering behaviour of ceramic tile bodies, Therefore, alternative tile compositions were formulated using perlite as a substitute for common alkali bearing raw materials. The sintering behaviour of the standard bodies and that of the perlite containing bodies were characterized using a double-beam optical non-contact dilatometer. Moreover, the effect of perlite on firing shrinkage (%), water absorption (%), apparent porosity (%), apparent density (g/cm3), bending strength and colour values (L, a, b) were studied and resultant microstructures were characterized by X-ray diffraction (XRD) and scanning electron microscope studies (SEM). It was clearly observed that perlite improves sinterability of the tile bodies but increases the firing shrinkage due to the presence of water in its structure. The low thermal expansion values of the sintered bodies containing perlite makes it a visible raw material for porcelain stoneware tiles. Resumen: Se ha investigado el efecto de una perlita de la región de Biga (noroeste de Turquía) sobre las propiedades físicas de composiciones estándar de gres porcelánico. Las fases presentes en las materias primas y su composición química se han determinado por difracción de Rx y fluorescencia de Rx, respectivamente. También se determinó algunas propiedades físicas de las materias primas cocidas como el color, la contracción y la absorción de agua. Se han planteado composiciones alternativas empleando perlita como sustituto de materias primas aportadoras de óxidos alcalinos. El comportamiento en la sinterización de las composiciones propuestas ha sido evaluado por dilatometría. Además, también se ha estudiado el efecto de la perlita sobre las propiedades físicas de las piezas sinterizadas, así como sobre las fases y la microestructura de las mismas mediante difracción de Rx y microscopía electrónica de barrido. Se observó que la perlita mejora la sinterabilidad de las piezas, pero aumenta la contracción de cocción debido, en parte, al contenido de agua estructural de este mineral. Se observó claramente que la perlita mejora la sinterización de las de los azulejos, pero aumenta la contracción de cocción debido a la presencia de agua en su estructura. Los bajos valores de expansión térmica de piezas sinterizadas que contienen perlita lo convierten en una materia prima visible para las baldosas de gres porcelánico.

Keywords

Flujo, TP785-869, Clay industries. Ceramics. Glass, Perlita, Azulejo de porcelana, Propiedades físicas

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
22
Top 10%
Top 10%
Top 10%
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