Silicon carbide tiv thaiv raj
Hauv cov lag luam uas muaj tej yam xwm txheej hnyav ua rau cov khoom siv puas tsuaj,silicon carbide (SiC) cov raj tiv thaivtawm los ua ib qho kev daws teeb meem tshiab. Tsis zoo li cov ntaub ntawv tiv thaiv ib txwm muaj, SiC raj sib xyaw cov khoom siv thev naus laus zis nrog kev tsim kho kom ruaj khov los tiv thaiv cov cuab yeej tseem ceeb thiab cov txheej txheem. Nws muaj cov txiaj ntsig zoo li nram no:
1. Kev Tiv Thaiv Zoo Tshaj Plaws Hauv Cov Xwm Txheej Uas Muaj Kev Sib Ntaus
Cov raj tiv thaiv SiC ua haujlwm ua thawj kab tiv thaiv hauv cov chaw uas tsis ua haujlwm:
(1) Kev Tiv Thaiv Kub: Tiv taus qhov kub thiab txias mus txog 1600 ° C, tiv thaiv cov sensors, thermocouples, lossis probes los ntawm cov hlau molten, nplaim taws, thiab plasma.
(2) Kev Tiv Thaiv Tshuaj: Tiv taus xeb los ntawm cov kua qaub (piv txwv li sulfuric, hydrochloric), alkalis, thiab cov pa roj reactive xws li chlorine lossis sulfur oxides.
Kev Tiv Thaiv Kev Sib Txhuam: Tiv thaiv cov khoom me me uas yaig hauv cov txaj dej, cov tshuab ua pa roj, lossis kev ua haujlwm hauv kev khawb av.
2. Kev Ntsuas Tseeb thiab Kev Ruaj Ntseg rau Kev Ntsuas Tseem Ceeb
Hauv cov txheej txheem kev lag luam uas muaj kev pheej hmoo siab, qhov tseeb yog qhov tseem ceeb. Cov raj SiC txhim kho kev ntseeg tau los ntawm:
(1) Txo Qhov Cuam Tshuam ntawm Cov Teeb Meem: Cov khoom tsis ua hluav taws xob tiv thaiv kev cuam tshuam hluav taws xob hauv cov sensors hluav taws xob.
(2) Kev Ruaj Ntseg Thermal: Ze li ntawm xoom qhov kev hloov pauv thermal ua kom ntseeg tau tias muaj kev sib phim thiab kev ntsuas qhov tseeb hauv qab qhov kub thiab txias hloov pauv sai.
(3) Kev Ruaj Ntseg Roj: Cov qauv tsis pub nkag tau tiv thaiv cov roj nkag mus, tseem ceeb rau cov tshuab nqus tsev lossis cov huab cua tswj tau.
3. Kev Siv Cov Txuj Ci Tshiab rau Cov Kav Dej SiC Tiv Thaiv tau qhib cov kev tsim kho tshiab hauv cov teb tshiab:
(1) Kev Lag Luam Hydrogen: Ua haujlwm ua cov sheaths ruaj khov rau cov sensors hauv kev tsim hydrogen, khaws cia, thiab cov roj cell, tiv taus embrittlement thiab kev raug H₂ siab.
(2) Kev Tsim Khoom Siv Semiconductor: Tiv thaiv cov khoom siv kho qhov muag thiab cov khoom siv thermal hauv CVD (Chemical Vapor Deposition) reactors los ntawm cov khoom ua ntej corrosive xws li silane lossis ammonia.
(3) Kev Tshawb Fawb Qhov Chaw: Tiv thaiv cov cuab yeej siv hauv cov cav rocket thiab cov planetary probes los ntawm kev hloov pauv kub heev thiab cosmic radiation.
4. Kev Siv Nyiaj Tau Zoo Los Ntawm Kev Siv Tau Ntev
Txawm hais tias cov raj SiC muaj cov nqi siab dua, lawv cov txiaj ntsig ntawm lub neej rov txhais dua tus nqi:
(1) Txo Lub Sijhawm Tsis Ua Haujlwm: Siv tau ntev dua li cov hlau lossis quartz lwm yam los ntawm 4-6 zaug hauv cov chaw abrasive lossis acidic, txo qis kev saib xyuas tsis tau npaj tseg.
(2) Cov Kev Cai Txheej Txheem Xoom: Tsis zoo li cov hlau uas xav tau cov txheej tiv thaiv, SiC cov khoom muaj nyob hauv nws tshem tawm cov nqi kho qhov chaw rov tshwm sim.
(3) Kev siv dua tshiab: Muaj sia nyob tau ntau lub voj voog ua haujlwm hauv cov ntawv thov xws li hlau casting lossis iav tsim yam tsis muaj kev puas tsuaj.
5. Kev Kho Kom Haum Rau Cov Kev Xav Tau Tshwj Xeeb
Cov raj tiv thaiv SiC hloov kho rau cov teeb meem tshwj xeeb los ntawm kev tsim kho tshwj xeeb:
(1) Cov Qauv Sib Xyaws: Sib xyaw nrog cov hlau lossis cov khoom siv ceramic rau ntau yam kev sib dhos ua haujlwm (piv txwv li cov khoom sib txuas threaded, flanges).
(2) Kev Hloov Kho Qhov Nto: Sab hauv ci ntsa iab rau kev siv kho qhov muag lossis sab nraud uas muaj cov qauv zoo nkauj los txhim kho kev tso cua sov tawm.
(3) Kev Yooj Yim Loj: Tsim los ntawm millimeters (lab-scale reactors) mus rau meters (industrial kilns).
6. Kev Sib Haum Xeeb ntawm Kev Ruaj Ntseg
Cov raj SiC txhawb nqa kev coj ua lag luam uas zoo rau ib puag ncig:
(1) Kev Txuag Hluav Taws Xob: Kev ua haujlwm thermal siab txo cov roj siv hluav taws xob txog li 20% piv rau cov hlau thaiv.
(2) Kev Txo Cov Khib Nyhiab: Lub neej ntev ua rau cov khoom pov tseg los ntawm kev hloov pauv ntau zaus.
(3) Kev Txo Qhov Mob Lom: Tshem tawm qhov xav tau cov txheej txheem phom sij (piv txwv li, cov hlau nickel-based) hauv cov chaw muaj xeb.
Shandong Zhongpeng Special Ceramics Co., Ltd yog ib qho ntawm cov khoom siv tshiab silicon carbide ceramic loj tshaj plaws hauv Suav teb. SiC technical ceramic: Moh qhov nyuaj yog 9 (New Moh qhov nyuaj yog 13), nrog kev tiv thaiv zoo heev rau kev yaig thiab xeb, kev puas tsuaj zoo heev - kev tiv thaiv thiab kev tiv thaiv oxidation. SiC cov khoom lub neej kev pabcuam yog 4 txog 5 zaug ntev dua li 92% alumina khoom. MOR ntawm RBSiC yog 5 txog 7 zaug ntawm SNBSC, nws tuaj yeem siv rau cov duab nyuaj dua. Cov txheej txheem hais nqe yog ceev, kev xa khoom yog raws li tau cog lus tseg thiab qhov zoo yog qhov thib ob rau tsis muaj leej twg. Peb ib txwm mob siab rau kev sib tw peb lub hom phiaj thiab muab peb lub siab rov qab rau lub zej zog.
