Laser Technology for the Rapid Repair of Defects in Sanitary Ware: Prospects and Challenges

ISSN online 2612-4882
ISSN print 2612-4408
J. Carneiroa, C.M.S. Freitasb, R. Santosc, N.M. Ferreirab, F. Rey-Garcíab, A.J.S. Fernandesb, M.P. Seabraa, F.M. Costab
aCICECO & Department of Materials and Ceramic Engineering, University of Aveiro, Aveiro, Portugal
bI3N & Department of Physics, University of Aveiro, Aveiro, Portugal
cTechnological Center Ceramic and Glass, iParque Parque Tecnológico de Coimbra, Antanhol, Coimbra, Portugal
(4 pages)


The repair of defects in sanitary ware during production entails considerable costs to the process, requiring, in most cases, a second firing of the entire piece. Thus, the development of a solution based on the localized repair of faults is very attractive to the sector. Laser technology fulfills this requirement, with a highly localized heat source allowing the repair of small defects by a fast, economical and environmentally friendly approach. This work studied the interaction between a CO2 laser and the glaze material to be repaired, setting the basic parameters to repair defects in sanitary ware pieces. This approach could decrease repair time from the 22 hours (conventional process) to only 7 min. However, due to the high thermal stresses, several cracks appeared in the ceramic surface being necessary an additional heat source, an infra-red lamp, to overcome crack formation. This combination reduced significantly the number of cracks and their dimensions. Nevertheless, a full functional solution was not possible to develop for sanitary ware, due to persisting thermal stresses issues.
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