Obiettivo This project has been technically a very successful one, in that a sol-gel varistor powder had been developed on a laboratory scale in UPS and upgraded to production level in PCF where they are now capable of producing powders for varistor applications with energy capabilities when processed in Harris Ireland on a pilot line scale which greatly exceed that of the goal. Harris Ireland have improved the energy capability of the zinc oxide arrestor from optimisation of rate control sintering and binder burn out. This has now been introduced into production. Other advances in the energy capability have been obtained through optimisation of spray drying parameters, the use of latex binders and compaction. These optimisations are to be introduced into production during the exploitation section of the project. ECP in conjunction with Sfims ODS have developed and upgraded a NC-NDT equipment to form a complete industrial prototype which is available for use in a production environment using computer friendly software.A new generation of doped ZnO ceramic powders will be developed for the industrial production of high performance varistor bodies capable of absorbing 2 to 3 times more energy as compared with present materials. The proposed new powder will be produced by a novel method of powder synthesis leading to higher homogeneity. At the same time, the subsequent ceramic processing will require the elimination or significant reduction of structural flaws and other mechanical defect (10 - 100 um) as regarding both their size and quantity. These flaws are responsible for premature failure of the ceramic components under overvoltage transients. The new ceramic powder and improved processing will be realised through completion of the following tasks:1.Development of new raw material precursors by novel wet-chemistry methods. 2.Development and optimization of reliable procedures to manufacture doped ZnO ceramic powders. 3.Development and optimization of pressing and sintering of ZnO ceramic samples. 4.Characterization and testing of sintered bodies. 5.Study and development of an optoacoustical NC-NDT system. 6.System capability assessment. 7.Control-on-line trials.Productivity gains of 15 - 20% are forecast with consequential lowering of unit costs and improvement in market share. Campo scientifico natural sciencescomputer and information sciencessoftwarenatural scienceschemical sciencesinorganic chemistrytransition metalssocial scienceseconomics and businesseconomicsproduction economicsproductivityengineering and technologymaterials engineeringceramics Programma(i) FP3-BRITE/EURAM 2 - Specific programme (EEC) of research and technological development in the field of industrial and materials technologies, 1990-1994 Argomento(i) 1.3.2 - Ceramics, ceramic matrix composites and advanced glasses Invito a presentare proposte Data not available Meccanismo di finanziamento CSC - Cost-sharing contracts Coordinatore Harris Ireland Contributo UE Nessun dato Indirizzo The Demesne 102 Dundalk Irlanda Mostra sulla mappa Costo totale Nessun dato Partecipanti (5) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto Centrale Recherche SA Francia Contributo UE Nessun dato Indirizzo Grande Voie des Vignes 92295 Châtenay-Malabry Mostra sulla mappa Costo totale Nessun dato PHARMACIE CENTRALE DE FRANCE Francia Contributo UE Nessun dato Indirizzo QUAI JEAN JAURES 07800 LA VOULTE-SUR-RHONE Mostra sulla mappa Costo totale Nessun dato Société Française de Réalisations Techniques et Commerciales SA Francia Contributo UE Nessun dato Indirizzo 53 rue Casimir Périer 95870 Bezons Mostra sulla mappa Costo totale Nessun dato UNIV DUBLIN CITY UNIVERSITY Irlanda Contributo UE Nessun dato Indirizzo COLLINS AVENUE DUBLIN 9 Mostra sulla mappa Costo totale Nessun dato Université de Toulouse III (Université Paul Sabatier) Francia Contributo UE Nessun dato Indirizzo 118 route de Narbonne 31062 Toulouse Mostra sulla mappa Costo totale Nessun dato
