1. Catalonia Institute for Energy Research-IREC, Sant Adrià de Besòs, 08930 Barcelona, Spain
2. Department of Materials and Environmental Chemistry, Stockholm University 106 91, Stockholm SE-10691, Sweden
3. Ceramic Powder Technology AS, Kvenildmyra 6, 7093 Tiller, Norway
4. UHasselt, Institute for Materials Research (IMO-Imomec) and Imec division Imomec, Agoralaan, Building D, 3590 Diepenbeek, Belgium
5. EnergyVilleThor Park 8320, 3600 Genk, Belgium