Cov khoom siv tseem ceeb thiab kev qhia tshwj xeeb: High-purity tungsten (W Ntau dua lossis sib npaug li 99.95%), nrog cov neeg tsawg yog tungsten -rhenium (W-Re) alloy. Qhov ceev: Cov pa 18.5 ~ 19.3 g / cm³ (siab-density version Ntau dua lossis sib npaug li 18.8 g / cm³). Melting point: 3410℃(qhov siab tshaj plaws ntawm cov hlau).
Kev Ua Haujlwm Tseem Ceeb 1. Kev Ua Haujlwm Kub Kub Kub Kub (Txheej Txheem mus txog 2600 degree) Nws tuaj yeem ua haujlwm ruaj khov rau lub sijhawm ntev hauv lub tshuab nqus tsev / inert huab cua xws li 2200 txog 2600 degree, tsis muaj melting, deforming, los yog volatilizing . 2. Cov tshuaj yog ruaj khov heev thiab tsis muaj kab mob. Nws NW nyuam qhuav tshwm sim nrog cov hlau feem ntau (titanium, zirconium, molybdenum, tsis tshua muaj ntiaj teb), molten ntsev, thiab quartz iav ntawm qhov kub thiab txias. Nws ua kom xoom impurity paug thiab lav qhov zoo ntawm - cov ntaub ntawv purity . 3. Ceev thermal conductivity, me me thermal expansion, thiab thermal conductivity coefficient ntau dua li ntawm ceramics / graphite, kom ntseeg tau tias qhov kub thiab txias sib txawv; ib qho thermal expansion coefficient tsis tshua muaj siab, ua rau muaj qhov tseeb qhov tseeb ntawm qhov kub thiab txias . 4. Resistant thermal shock thiab ntev - kav ntev, nws yog resistant rau ceev ceev txias thiab cua sov, ua rau nws tsis tshua muaj kev tawg; Nws yog tawv dua li ceramics thiab tiv taus oxidation ntau dua li graphite, nrog rau lub neej kev pab cuam deb tshaj li ntawm cov tsoos crucibles . 5. Nrog qis vapor siab thiab tsawg tsawg outgassing nyob rau hauv siab - nqus tsev thiab huv siab - qhov kub thiab txias, nws yog lub thawv zoo tagnrho rau high / ultra{14}}high vacuum.
Mainstream manufacturing processes include sintered type (most commonly used): tungsten powder is molded and sintered at high temperatures (2300℃+), resulting in high density, good integrity, and suitability for large sizes. Spinning/stamping type: tungsten plates/sheets are spun into shape, with nyias phab ntsa thiab siab smoothness, haum rau me me/nruab nrab-sized crucibles. Vuam hom: tungsten daim hlau raug txiav, dov, thiab welded rau hauv cov duab, tso cai rau ultra- loj diameters thiab cov kab noj hniav sib sib zog nqus. Tig hom: tungsten rods yog ncaj qha tig, ua tiav siab precision thiab tsis muaj vuam seams, haum rau me me, siab -precision crucibles.
Cov cheeb tsam tseem ceeb (qhov tseem ceeb rau ultra{0}} qhov kub thiab txias) 1. Sapphire / monocrystal kev loj hlob (kev lag luam loj tshaj) Sapphire (Al₂O₃) siv lead ua loj hlob rau lub cub tawg, nrog rau qhov kub thiab txias ua haujlwm ntawm 2050 ~ 2200 degree, ncaj qha txiav txim siab siv lead ua zoo. 2. Tsis tshua muaj lub ntiaj teb melting hlau smelting, tsis tshua muaj melting ntiaj teb smelting cerium, neodymium, thiab lwm yam), resistant rau melting thiab corrosion, tsis yog - polluting, thiab ntev - kav ntev . 3. Quartz iav melting High- kub fused silica, resistant rau iav kua yaig, tsis tsim npuas thiab impurities{10}} melting xws li hlau tsis tshua muaj melting point. titanium, zirconium, niobium, molybdenum, thiab vanadium. 5. Semiconductor/electronics/vacuum industry evaporation txheej, electron beam crucible, siab -kub sintering nkoj, lub tshuab nqus tsev rwb thaiv tsev / cov khoom siv hluav taws xob zoo{13} thiab cov khoom siv nuclear industries, sintering ntawm tshwj xeeb alloys, thiab nuclear roj ntim.
