Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Neodymium Metal: Oxide Reduced by Graphite in Vacuum, Distilled at 1900 °C onto Tantalum (Downing, Union Carbide, US 3,104,970)
Charlie

Yaremwe na

Charlie

31. Ukwakira 2026DE
4
0
0
0
0

Neodymium Metal: Oxide Reduced by Graphite in Vacuum, Distilled at 1900 °C onto Tantalum (Downing, Union Carbide, US 3,104,970)

Carbon cannot pull neodymium out of its oxide in an ordinary furnace. In a hard vacuum it can: the oxide and graphite turn into neodymium carbide, and at 1900 °C the neodymium itself boils off and condenses as metal on a cool tantalum plate. Result: neodymium metal, 99.21 % Nd and 0.83 % carbon in Union Carbide's run. Source: Downing, Gorski and Koerner, US 3,104,970 (Union Carbide, 1963), Example II. That example starts from a samarium-neodymium mixture; using it for pure neodymium oxide is ours. Picture drawn by Youblob.
Hejuru
2 days

Amabwiriza

1

Mix with graphite and pelletise

Mix the oxide intimately with powdered graphite (Example II: 78 % oxides to 22 % graphite by weight, 1.8 % carbon over theory; the patent allows 1-15 %, prefers 5-10 %), particles under about 50 microns, and press into 0.75 in pellets.

Ibikoresho by'iyi ntambwe:

Okiside ya neodimiyumuOkiside ya neodimiyumu78 parts
Ifu ya girafiteIfu ya girafite22 parts

Ibikoresho bikenewe:

Umunzani w'ibiroUmunzani w'ibiro
Imashini ikanda ibininiImashini ikanda ibinini
2

Reduce in vacuum to the carbide

Heat the pellets in a vacuum induction furnace at 0.15 micron for about 8 hours. The example's temperature is printed "1700-1700 °C"; claim 5 gives about 1920 °C for about 16 hours. Volatile matter goes to a graphite condenser; the neodymium stays behind as carbide.

Ibikoresho bikenewe:

Itanura rya inductionItanura rya induction
Pompe ikuramo umwukaPompe ikuramo umwuka
Inkono yo gushongesha ya giraphiteInkono yo gushongesha ya giraphite
3

Purge at 1600 °C

Reheat the carbide residue in a carbon crucible at 1600 °C and 0.05 micron for 1 hour (in the example this drove off the last samarium). The residue is substantially pure neodymium carbide.

Ibikoresho bikenewe:

Itanura rya inductionItanura rya induction
Pompe ikuramo umwukaPompe ikuramo umwuka
Inkono yo gushongesha ya giraphiteInkono yo gushongesha ya giraphite
4

Distil the metal at 1900 °C onto tantalum

Heat it in a graphite crucible to 1900 °C at 0.05 micron for 3 hours. Neodymium boils off and condenses on a tantalum plate, which barely alloys with it: 99.21 % neodymium, 0.83 % carbon.

Ibikoresho bikenewe:

Itanura rya inductionItanura rya induction
Pompe ikuramo umwukaPompe ikuramo umwuka
Inkono yo gushongesha ya giraphiteInkono yo gushongesha ya giraphite
Isahani yo gukonjesha ya tantalumuIsahani yo gukonjesha ya tantalumu

Ibikoresho

2

Ibikoresho bikenewe

6

Iki gishushanyo gikora

Thumbnail
Agateganyo

Icyuma cya neodymium

Free

85
0

Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

Neodymium and Praseodymium Oxides: Rare Earths Separated into Coloured Bands on a Bleached Resin Column (Jaffe, US 2,897,050)
Akaga

Neodymium and Praseodymium Oxides: Rare Earths Separated into Coloured Bands on a Bleached Resin Column (Jaffe, US 2,897,050)

na CharlieDE

Bidafite Ubuzima

4
0
0
0
0
0

CC0 Umurenge rusange

Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.

Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.

Ibiganiro

(0)

Injira kugira ngo ujye mu biganiro

Gutegura ibitekerezo...