«These brittle materials have properties that are either indispensable or superior compared with the ductile materials they compete with. These rearkable ceramic properties are: refractoriness, stability and thermal insulation, hardness and resistance to erosion, chemical stability and resistance to oxidation, particular electrical, magnetic and optical properties and above all, a lower cost for many given applications.»

                                                                                                                                                                                                                                                          Allaire, C., Matériaux céramiques, 1998.