Italian pumice and volcanic lapillus scraps have been used in different percentages as alternative raw materials to foreign feldspars in porcelain stoneware mixtures. The aim of this work was to create naturally colored support to limit the use of artificial dyes while maintaining the technical properties of the reference product. For this purpose, the significant presence of chromophores (Fe and Ti in particular) in by-products from extraction of Italian volcanic pumice and lapillus was exploited. The work was carried out in collaboration with a company: the products were made on a laboratory scale and then they were glazed and fired within the industrial production cycle (48 min, 1210 ◦C). The resulting slip and the fired samples were characterized by measuring the efflux time, density, linear shrinkage, water absorption and tensile strength to evaluate the technological performance. In addition, thermogravimetric analysis (TG), differential thermal analysis (DTA), and optical and mechanical dilatometry were performed to study the thermal behavior of the formulations. The obtained products could be classified as porcelain stoneware and belong to the BIa group (WA 0.5%, B. S.>35 MPa) in accordance with UNI EN 14411 ISO 13006.

Pumice and lapillus scraps: New national environmental-friendly chance for the production of ceramic tiles / Altimari, F.; Andreola, F.; Benassi, P. P.; Lancellotti, I.; Barbieri, L.. - In: CERAMICS INTERNATIONAL. - ISSN 0272-8842. - 49:23(2023), pp. 38743-38753. [10.1016/j.ceramint.2023.09.211]

Pumice and lapillus scraps: New national environmental-friendly chance for the production of ceramic tiles

Altimari F.
;
Andreola F.;Lancellotti I.;Barbieri L.
2023

Abstract

Italian pumice and volcanic lapillus scraps have been used in different percentages as alternative raw materials to foreign feldspars in porcelain stoneware mixtures. The aim of this work was to create naturally colored support to limit the use of artificial dyes while maintaining the technical properties of the reference product. For this purpose, the significant presence of chromophores (Fe and Ti in particular) in by-products from extraction of Italian volcanic pumice and lapillus was exploited. The work was carried out in collaboration with a company: the products were made on a laboratory scale and then they were glazed and fired within the industrial production cycle (48 min, 1210 ◦C). The resulting slip and the fired samples were characterized by measuring the efflux time, density, linear shrinkage, water absorption and tensile strength to evaluate the technological performance. In addition, thermogravimetric analysis (TG), differential thermal analysis (DTA), and optical and mechanical dilatometry were performed to study the thermal behavior of the formulations. The obtained products could be classified as porcelain stoneware and belong to the BIa group (WA 0.5%, B. S.>35 MPa) in accordance with UNI EN 14411 ISO 13006.
2023
19-set-2023
49
23
38743
38753
Pumice and lapillus scraps: New national environmental-friendly chance for the production of ceramic tiles / Altimari, F.; Andreola, F.; Benassi, P. P.; Lancellotti, I.; Barbieri, L.. - In: CERAMICS INTERNATIONAL. - ISSN 0272-8842. - 49:23(2023), pp. 38743-38753. [10.1016/j.ceramint.2023.09.211]
Altimari, F.; Andreola, F.; Benassi, P. P.; Lancellotti, I.; Barbieri, L.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1322566
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