Ultra-fine particle tungsten poda yakasviba, yakanaka particletungstenhupfu hwakasviba grey, uye coarse particle tungsten hupfu igrey ine simbi inopenya.Metal tungsten poda inogona kugadzirwa nekudzikisa tungsten oxide.Nzira huru dzekudzikisa ihydrogen kuderedza uye kuderedza kabhoni.Parizvino, nzira yekudzikisa hydrogen inowanzoshandiswa.Kubatana kwehydrogen neokisijeni pakupisa kwakanyanya kwakakura kupfuura kuwirirana kwe tungsten uye oxygen.Naizvozvo, tungsten trioxide inotanga kuderedzwa nehydrogen pa380 ~ 400°C.Hydrogen inogona kuderedza tungsten dioxide mukatitungsten upfupamusoro pe630°C.
.Thetungsten upfuinogadzirwa nehydrogen yekudzikisa nzira ine kuchena kwakanyanya uye iri nyore kudzora saizi yehupfu.Mukushaikwa kwehydrogen, nzira yekudzikisa kabhoni inowanikwawo.Chakanakira uswa hwakaoma ndechekuti kabhoni dema yakachipa uye iri nyore kuwana, asi saizi yehupfu yakaoma kudzora.Pane imwe nguva yekuderedza nzira yekuderedza tungsten oxide nehydrogen kugadzirira tungsten powder, uye kunewo nzira yakawanda yekuderedza nzira iyo inotanga kuderedza WO3 kusvika kuWO2, uye inoderedza oxalic acid kutanga kuumba w powder.Muchigadzirwa chezvino chekugadzira, tungsten powder inowanzobudiswa ne-one-stage yakananga kuderedza nzira.
Uye zvakare, kune zvakare nzira yekudzikisa zvakananga ammonium paratungstate kuita tungsten hupfu.Imwe yakakosha-chinangwa tungsten inogadzirirwawo ne halide kuderedza nzira.
Kune zvakare iyo aluminothermic nzira yekudzikisa ore poda uye kuigadzirira.Kubva 2000, maitiro ekugadzira ultrafine tungsten poda nehydrogen kuderedzwa kweviolet tungsten yakasimudzirwa zvakanyanya.
Nguva yekutumira: Jan-03-2024
