Crucible Selection: 

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Material T °C Melting P. T °C 10-4 Torr Al2O3 PBN PG Ta Remarks
Silver 961 832          
Barium 729 462         Forms alloys with ceramics
BaF2             Use a slow heating
Boron 2027 1707          
CaF2             Use a slow heating
Cerium 798           Forms borides
CeF3             Use a slow heating
Chromium 1857 1157         Violent reaction with PBN
Cobalt 1495 1257         Very reactive with PBN at 1 500°C
Copper 1084 1027          
Dysprosium 1409 897          
Erbium 1522 947          
Gadolinium 1312            
Germanium 937 1137         Wets refractories
Iron 1536 1227         Violent reaction with PBN
Lanthanum 920 1422          
Lutecium 1663           Sublimes
Neodymium 1016            
Nickel 1453 1262         Reacts with PBN at 1 000°C
Niobium 2467 2277          
Gold 1064 1132          
Palladium 1552 1192          
Platinum 1772 1747         Reacts with PBN at 1 500°C
Rhodium 1963 1707          
Scandium 1541 1107          
Silicon 1412 1337         Slow reaction with PBN
Terbium 1357            
Titanium 1670 1442         Forms TiB2 with PBN
Vanadium 1902            
Yttrium 1526 1332          

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