60percent of zinc oxide, 20percent of aluminum oxide, 15percent of stannous oxide, 2.5percent of lanthanum oxide and 2.5percent of cerium oxide; reducing by hydrogen T=140°C; P=3750.38 Torr; 2 h; Large scale;

80percent zinc oxide, 10percent aluminum oxide, 5percent lanthanum oxide, 5percent cerium oxide, reducing by hydrogen T=180°C; P=15001.5 Torr; 0.166667 h; Large scale;

70percent zinc oxide, 15percent aluminum oxide, 14percent lanthanum oxide, 1percent cerium oxide, reducing by hydrogen T=120°C; P=30003 Torr; 1 h; Large scale;