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 Clays from the Bay of Naples (Italy): New insight on ancient and traditional ceramics

 
De Bonis A.1, Cultrone G.2, Grifa C.3, Langella A.3 & Morra V.1 
 
Journal of the European Ceramic Society (2014).
 
 
1Dipartimento di Scienze della Terra, dell'Ambiente e delle Risorse (DiSTAR), Università Federico II, Via Mezzocannone 8, 80134 Napoli, Italy
2Departamento de Mineralogía y Petrología, Universidad de Granada, Avda. Fuentenueva s/n, 18002 Granada, Spain
3Dipartimento di Scienze e Tecnologie, Università del Sannio, Via dei Mulini 59/A, 82100 Benevento, Italy
 
 
Abstract
The features of two clayey raw materials from the Bay of Naples and their fired products were investigated via minero-petrographic and physical techniques. Clay preparation and firing dynamics were performed following a process similar to that performed by ancient and traditional potters. A high-CaO marine clay from Ischia was mixed with different amounts of volcanic temper in order to replicate most common ware. These mixtures show a fair mechanical resistance starting from relatively low firing temperatures (>850 °C). The addition of temper resulted in different technological characteristics.
Foto 1 lavoro ceramiche Foto 2lavoro ceramiche
A low-CaO weathered pyroclastics from the Sorrento Peninsula was prepared to simulate heat resistant and refractory ceramics. Fired products are characterised by a less resistant ceramic body up to 1000 °C compared to Ischia ceramics. Despite worse strength these ceramics show a porous structure, yielding better refractory performances.