tungsten hmoov

Nws yog xim hlau-zoo li grey-dub hlau uas yog glossy (lub cev-centred cubic crystals). melting point: 3400 degree. Kub taw tes yog 555 degree. Qhov ntau yog 200-250 rau sintered tungsten tuav thiab 350-400 rau hammered tungsten rods. Melting yog ua tiav los ntawm kev sib xyaw sodium hydroxide thiab sodium carbonate. Tsuas yog marginally soluble hauv nitric acid, sulfuric acid, thiab aqua regia; insoluble hauv dej, hydrofluoric acid, thiab potassium hydroxide. Muaj ob hom tungsten: A thiab B. Hom A yog ib qho atmospheric siab thiab chav tsev kub ruaj khov lub cev-centered cubic duab. Hom B tungsten tsuas yog tshwm sim thaum muaj oxygen. Nws ruaj khov hauv qab 630 degree tab sis irrevocably hloov rov qab rau hauv tungsten tshaj 630 degree.

Txoj kev npaj

Ua los ntawm hydrogen thiab tungsten trioxide los yog ammonium paratungstate. Nyob rau hauv thawj theem ntawm cov txheej txheem hydrogen txo, tungsten trioxide txo mus rau tungsten dioxide ntawm qhov kub ntawm 500 mus rau 700 degree .Qhov kev txo qis yog feem ntau nqa tawm hauv lub tshuab hluav taws xob hluav taws xob los yog lub qhov cub tig. , xws li purity, particle loj, muaj pes tsawg leeg, thiab lwm yam, feem ntau yog los ntawm kev txo cov txheej txheem. Qhov txo qis, qhov nyiaj ntawm tungsten oxide tso rau hauv lub qhov cub, tus nqi ntawm lub qhov cub txav, qhov ntws ntawm hydrogen, thiab cov dej noo ntawm cov hydrogen yog cov txheej txheem tseem ceeb ntawm kev hloov pauv uas cuam tshuam rau qhov txo qis thaum nws txo qis hauv lub raj. rauv. Qhov loj me me tau coarser thaum qhov kub ntawm qhov txo qis nce.

Nws kuj tseem tuaj yeem tsim los siv cov txheej txheem tungsten oxide carbon txo thaum ntxov, qhov txo qhov kub siab tshaj 1050 degree, ntxiv rau txoj kev txo hydrogen. Los ntawm kev siv cov txheej txheem no, tsawg purity yog tsim. Tsis tas li ntawd, hlau calcium, zinc, thiab txhuas tau siv los ua kom txo qis tungsten oxide. Rau qee daim ntawv thov uas xav tau kev ua kom huv siab, ultra-fine particle loj tungsten hmoov, txo cov hydrogen ntawm tungsten chloride, uas ua rau cov particle loj tsawg dua 0.05 m, tau tsim.

Cov txheej txheem ntawm hydrogen txo, ammonium paratungstate kev kho mob nrog cov kua qaub, ua raws li los ntawm rhuab decomposition thiab hydrogen txo los tsim tungsten trioxide yog siv nyob rau hauv kev lag luam manufacturing.
1. Hydrogen txo qis ntawm tungsten trioxide tuaj yeem ua tiav hauv ob theem, thawj qhov yuav tsum tau ua kom sov cov khoom mus rau 550-800 degree thiab hydrogen txo, thiab qhov thib ob ntawm cov cua kub nws mus rau 650-850 degree thiab tsim cov khoom zoo tshaj plaws, tungsten hmoov.

2. Ammonium paratungstate tseem tuaj yeem txo qis ntxiv nrog hydrogen kom tau txais xiav tungsten oxide (xiav tungsten) los ntawm thawj zaug dhau hydrogen los ntawm nws los yog tsis. Cov particle loj thiab muaj pes tsawg leeg yog qhov tseem ceeb zoo ntsuas. Qhov kev txo qis yog ua nyob rau hauv ib lub tubular hluav taws xob rauv los yog lub tshuab hluav taws xob tig.

Cim npe nrov: tungsten hmoov, lwm tus neeg, manufacturers, hoobkas, customized, yuav, nqe, hais, zoo, cia muag, hauv Tshuag