Ko nga tikanga matua mo te hanga o te paura tungsten

Ko te paura Tungsten te tino rauemi mo te hanga o te tungsten carbide, te tungsten parakore, te tungsten alloys me etahi atu hua tungsten, me te 70% o te paura tungsten e whakamahia ana i roto i te hanga o te tungsten carbide. I tenei wa, ko nga tikanga matua mo te tango i te paura tungsten ko:

Tikanga whakaheke hauwai o te waikura tungsten

He tikanga tenei mo te whakaheke i te waikura tungsten ki te paura tungsten ma te whakamahi i te H2 hei kaihoko whakaheke. Hei tauira te whakaheke hauwai o WO₃, ko te tauhohenga katoa ko:

WO₃+3H₂=W+3H₂O

I tenei wa, ko nga waikura tungsten e whakamahia ana hei rauemi mata mo te whakaheke hauwai ko te nuinga ko te tungsten trioxide kowhai (WO₃), te tungsten oxide puru (te nuinga o te WO₂.₉), me te waikura tungsten papura (WO₂.₇₂), me etahi atu.

2. Te whakaheke i te hauwai o te tungsten halides

He tikanga tenei e whakamahi ana i te H2 hei kaihoko whakaheke ki te whakaheke i nga haupae tungsten (penei i te tungsten chloride, tungsten fluoride) ki te tungsten whakarewa. Hei tauira, mo te whakaheke hauwai o WCl6, ko te tauhohenga katoa ko:

WCl6+3H₂=W+6HCI

Ko te tukanga whakaheke hauwai o te tungsten halides he tauhohenga hau-waahanga, i te nuinga o te waa e whakamahia ana i roto i te waipara matū matū hei whakaputa i te paura tungsten ultrafine me nga paninga tungsten ranei. I tenei wa, ka whakamahia noa te tikanga whakaheke chlorination o te tungsten halides mo te hanga iti.

3. Tikanga Whakaiti waro o Tungsten Oxides

Ina whakawerahia te ranunga o te waikura tungsten me te waro ki tetahi pāmahana, ka heke nga waikura tungsten ki te paura tungsten. Hei tauira te whakaheke waro o WO₃, ko te tauhohenga katoa ko:

WO₃+3C=W+3CO

WO₃+3CO=W+3CO₂

I etahi wa, ka whakauruhia he iti o te hauwai ki roto i te oumu hei whakatairanga i te tukanga whakaheke waro. Engari, ko te paura tungsten i hangaia e tenei tikanga he nui te waro o te waro kaore e pai mo nga hua tungsten. I tenei wa, he iti ake te whakamahi i te tikanga whakaheke waro mo te whakarite i te paura tungsten, engari kei te kaha ake te whakamahi i roto i te hanga tika o te tungsten carbide, ina koa te ultrafine tungsten carbide paura me te tungsten carbide composite paura.

4. Ētahi atu Tikanga

Ko etahi atu tikanga mo te hanga tungsten konganuku ko te hiko tote whakarewa, te whakaheke konutea, me te whakaheke hauwai plasma, me etahi atu.