Iindlela eziphambili zokuVeliswa kwePowder yeTungsten

I-tungsten powder yeyona nto iphambili kwimveliso ye-tungsten carbide, i-tungsten esulungekileyo, ii-alloys ze-tungsten kunye nezinye iimveliso ze-tungsten, ngaphezulu kwe-70% ye-tungsten powder esetyenziswa kwimveliso ye-tungsten carbide. Okwangoku, iindlela eziphambili zokufumana i-tungsten powder zezi:

Indlela yokunciphisa i-hydrogen ye-tungsten oxide

Le yindlela yokunciphisa i-tungsten oxide kwi-tungsten powder usebenzisa i-H2 njenge-agent yokunciphisa. Ukuthatha ukucuthwa kwe-hydrogen ye-WO₃ njengomzekelo, impendulo iyonke yile:

WO₃+3H₂=W+3H₂O

Okwangoku, i-tungsten oxides esetyenziswa njengezinto ezikrwada zokunciphisa i-hydrogen ikakhulu ibandakanya i-yellow tungsten trioxide (WO₃), i-tungsten oxide eluhlaza okwesibhakabhaka (ikakhulu i-WO₂.₉), kunye ne-purple tungsten oxide (WO₂.₇₂), njl. Indlela yokunciphisa i-hydrogen ye-tungsten oxide yeyona ndlela iphambili yokuvelisa i-metal tungsten powder.

2. Ukunciphisa i-Hydrogen ye-tungsten halides

Le yindlela esebenzisa i-H2 njenge-agent yokunciphisa ukunciphisa i-tungsten halides (efana ne-tungsten chloride, i-tungsten fluoride) kwi-metallic tungsten. Umzekelo, kwimeko yokunciphisa i-hydrogen ye-WCl6, impendulo iyonke yile:

WCl6+3H₂=W+6HCI

Inkqubo yokunciphisa i-hydrogen ye-tungsten halides yinkqubo ye-gas-phase reaction, isetyenziswa ikakhulu kwi-chemical vapor deposition ukuvelisa i-ultrafine tungsten powder okanye i-tungsten coatings. Okwangoku, indlela yokunciphisa i-chlorination ye-tungsten halides isetyenziselwa kuphela imveliso encinci.

3. Indlela yokuNcitshiswa kweCarbon yeTungsten Oxides

Xa umxube we-tungsten oxides kunye nekhabhoni ifudunyezwa kwiqondo lokushisa elithile, i-tungsten oxides iyancitshiswa ibe ngumgubo we-tungsten. Ukuthatha ukuncitshiswa kwekhabhoni ye-WO₃ njengomzekelo, impendulo iyonke yile:

WO₃+3C=W+3CO

WO₃+3CO=W+3CO₂

Ngamanye amaxesha, inani elincinci le-hydrogen lingeniswa kwisithando somlilo ukukhuthaza inkqubo yokunciphisa i-carbon. Nangona kunjalo, i-tungsten powder eveliswa yile ndlela inomxholo ophezulu wekhabhoni kwaye ayifanelekanga kwiimveliso ze-tungsten. Okwangoku, indlela yokunciphisa ikhabhoni yokulungiselela i-tungsten powder ayisetyenziswanga kancinci, kodwa isetyenziswa ngakumbi kwimveliso ethe ngqo ye-tungsten carbide, ngakumbi i-ultrafine tungsten carbide powder kunye ne-tungsten carbide composite powder.

4. Ezinye iindlela

Ezinye iindlela zokuvelisa i-metallic tungsten ziquka i-electrolysis yetyuwa etyhidiweyo, ukunciphisa i-zinc, kunye nokunciphisa i-hydrogen plasma, phakathi kwabanye.