tungsten hlau ntau lawm

Tungsten filament ntau lawm feem ntau siv ammonium paratungstate (APT) ua raw khoom. Cov txheej txheem dav dav suav nrog calcining APT hauv huab cua nyob ib puag ncig 500℃los tsim tungsten trioxide, lossis txo qis me ntsis hauv hydrogen nyob ib ncig ntawm 450℃los tsim xiav tungsten oxide. tungsten filaments rau lub teeb incandescent yuav tsum tau ntxiv me me ntawm poov tshuaj oxide, silicon dioxide, thiab txhuas oxide rau tungsten trioxide los yog xiav tungsten oxide; tag nrho ntawm peb qhov no yuav tsum tsis pub tshaj 1%.

Cov doped tungsten oxide yog tom qab ntawd txo rau cov hmoov hlau tungsten siv hydrogen. Cov txheej txheem kev txo qis feem ntau suav nrog ob kauj ruam: ua ntej, txo qis rau tungsten dioxide (xim av tungsten oxide) nyob ib ncig ntawm 630 degree, thiab thib ob, txo cov hmoov metallic tungsten nyob ib ncig ntawm 820 degree. Lub hom phiaj ntawm ob qhov kev txo qis no yog txhawm rau xyuas kom cov poov tshuaj ntxiv tau siv tag nrho thiab tswj cov hmoov particle loj. Lub resulting doped tungsten hmoov yog ces nias rau hauv ntev, nyias nyias strips nyob rau hauv ib tug tshwj xeeb tsim pwm. Lub tungsten bar yog sintered los ntawm kev hla cov hluav taws xob tam sim no los ntawm hydrogen gas thiab cua sov nws siv tus kheej -kuj (nce txog qhov kub ntawm kwv yees li 3000℃). Tom qab sintering, qhov ceev ntawm tungsten bar tuaj yeem ncav cuag ntau dua 85% ntawm tus nqi theoretical. Cov tungsten bar no tuaj yeem raug forged rau hauv tungsten rods nrog ib txoj kab uas hla ntawm kwv yees li 3 hli siv txoj kev sib hloov, thiab ntxiv ua tiav rau hauv cov xov hlau tungsten ntawm ntau cov thicknesses siv txoj kev tuag- kos duab.

Thaum txoj kab uas hla ntawm tungsten xaim mus txog qib micrometer, nws yog qhov nyuaj rau ntsuas nws txoj kab uas hla siv cov pa calipers. Yog li ntawd, thoob ntiaj teb, lub thickness ntawm tungsten xov hlau nrog ib txoj kab uas hla ntawm tsawg tshaj li 0.2 hli yog feem ntau qhia los ntawm qhov hnyav ntawm ib tug 200 hli ntev seem ntawm cov hlau.