ATTEMPTS OF INCORPORATION OF METAL PLATING SLUDGES IN CERAMIC PRODUCTS D.M.S. Couto 1 , R.F. Silva 1 , F. Castro 2 , J.A. Labrincha 1* 1 Ceramics and Glass Engineering Dept., UIMC, Univ. of Aveiro, 3810 Aveiro, Portugal 2 Dept. Mechanical Engineering, University of Minho, 4800 Guimarães, Portugal * Author to whom correspondence should be addressed phone: +351-234370250 fax: +351-234425300 email: JAL@CV.UA.PT