Boron nitrideyog ib qho siv lead ua uas muaj nitrogen thiab boron atoms. Cov tshuaj muaj pes tsawg leeg yog 43.6% boron thiab 56.4% nitrogen, nrog plaub qhov sib txawv: HBN, RBN, CBN, thiab WBN. CBN feem ntau yog xim dub, xim av, lossis tsaus liab siv lead ua nrog cov qauv sphalerite thiab zoo thermal conductivity. Hardness yog thib ob tsuas yog pob zeb diamond thiab yog cov khoom siv superhard feem ntau siv los ua cov cuab yeej siv thiab cov abrasives. BN yog resistant rau tshuaj tua kab mob thiab tsis eroded los ntawm inorganic acids thiab dej. Lub boron nitrogen daim ntawv cog lus yog tawg nyob rau hauv kub concentrated alkali. Oxidation pib hauv huab cua ntawm 1200 degree. Decomposition pib ntawm li 2700℃hauv lub tshuab nqus tsev. Me ntsis soluble nyob rau hauv burning acid, insoluble nyob rau hauv dej txias, txheeb ze ntom 2.29. Lub zog compressive yog 170Mpa. Qhov siab tshaj plaws kev khiav hauj lwm kub yog 900℃nyob rau hauv ib tug oxidizing cua thiab 2800℃nyob rau hauv ib tug inactive txo cua, tab sis lub lubricating kev ua tau zoo yog tsis zoo nyob rau hauv chav tsev kub. Feem ntau cov khoom ntawm BN zoo dua li cov ntaub ntawv carbon. Rau HBN: tsis tshua muaj kev sib txhuam coefficient, zoo siab - kub stability, zoo kub poob siab kuj, siab zog, siab thermal conductivity, tsis tshua muaj expansion coefficient, siab resistivity, corrosion kuj, microwave los yog infrared kis tau tus mob.
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Tshuaj Formula |
BN |
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Exact Mass |
25 |
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Molecular Luj |
25 |
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m/z |
25 (100.0%), 24 (24.8%) |
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Elemental Analysis |
B, 43.56; N, 56.44 |
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Cov yam ntxwv ntawm cov khoom
CBN feem ntau yog xim dub, xim av, lossis tsaus liab siv lead ua nrog cov qauv sphalerite thiab zoo thermal conductivity. Hardness thib ob tsuas yog pob zeb diamond, nws yog cov khoom siv superhard uas feem ntau siv los ua cov cuab yeej siv thiab abrasive.
Boron nitridemuaj tshuaj tiv thaiv thiab tsis corroded los ntawm inorganic acids thiab dej. Lub boron nitrogen daim ntawv cog lus yog tawg nyob rau hauv kub concentrated alkali. Oxidation pib hauv huab cua siab tshaj 1200 degree. Decomposition pib ntawm ib ncig ntawm 2700℃nyob rau hauv lub tshuab nqus tsev vacuum. Me ntsis soluble nyob rau hauv kub acid, insoluble nyob rau hauv dej txias, nrog ib tug txheeb ze ntom ntawm 2.29. Thaum boiled nrog dej, hydrolysis qeeb heev, ua ib tug me me ntawm boric acid thiab ammonia. Nws tsis hnov mob nrog tsis muaj zog acids thiab muaj zog hauv paus ntawm chav tsev kub thiab yog me ntsis soluble hauv kub acids. Nws tsuas tuaj yeem decompose thaum kho nrog molten potassium hydroxide, thiab chlorine tsuas tuaj yeem hnov mob nrog nws hauv qab kub kub.
Lub zog compressive yog 170MPa. Qhov siab tshaj plaws kev khiav hauj lwm kub nyob rau hauv oxidizing cua yog 900 degree, thaum nws muaj peev xwm ncav cuag 2800℃nyob rau hauv tsis reactive txo cua, tab sis lub lubrication kev ua tau zoo yog tsis zoo nyob rau hauv chav tsev kub. Feem ntau ntawm cov khoom ntawm BN yog superior rau cov ntaub ntawv carbon. Rau HBN: tsis tshua muaj kev sib txhuam coefficient, zoo siab - kub stability, zoo thermal shock kuj, siab zog, siab thermal conductivity, tsis tshua muaj expansion coefficient, siab hluav taws xob resistivity, corrosion kuj, microwave los yog infrared pob tshab.
Khoom siv
BN hexagonal crystal system, feem ntau graphite lattice, kuj muaj amorphous variants. Ntxiv rau daim ntawv siv lead ua hexagonal, BN muaj lwm cov ntaub ntawv siv lead ua, suav nrog r-BN, c-BN thiab w-BN. Tib neeg txawm pom ob - qhov loj me BN crystals uas zoo li graphite nyias.
Cov uas nquag uaboron nitride hmoovmuaj graphite hom qauv, feem ntau hu ua dawb graphite. Lwm hom yog pob zeb diamond hom, uas zoo ib yam li lub hauv paus ntsiab lus ntawm graphite transforming rau hauv pob zeb diamond. Graphite hom BN tuaj yeem hloov mus rau hauv pob zeb diamond hom BN ntawm qhov kub thiab txias (1800 degree) thiab siab siab (8000Mpa) [5-18Gpa]. Nws yog ib hom tshiab ntawm high-temperature resistant superhard khoom siv los ua laum khoom, sib tsoo cov cuab yeej, thiab cov cuab yeej txiav.
Txoj kev npaj
Nyob rau hauv 1957, Wentorf thawj synthesized cubic BN artificially. Thaum qhov kub los yog siab tshaj 1700℃thiab qhov siab tshaj plaws yog 11-12GPa, ntshiab HBN ncaj qha hloov mus rau CBN. Tom qab ntawd, nws tau pom tias kev siv cov catalysts tuaj yeem txo qhov kev hloov pauv kub thiab siab. Cov catalysts uas nquag siv muaj xws li alkali thiab alkaline ntiaj teb hlau, alkali thiab alkaline ntiaj teb nitrides, alkaline ntiaj teb fluoronitrides, ammonium borate ntsev, thiab inorganic fluorides. Qhov kub thiab siab xav tau rau kev siv ammonium borate raws li catalyst yog qhov qis tshaj plaws, nrog lub siab ntawm 5GPa ntawm 1500℃thiab qhov kub ntawm 600-700℃ntawm 6GPa. Los ntawm qhov no, nws tuaj yeem pom tau tias txawm tias ntxiv cov catalysts tuaj yeem txo qhov kev hloov pauv kub thiab siab heev, qhov xav tau qhov kub thiab txias yog qhov tseem ceeb heev. Yog li ntawd, cov cuab yeej siv rau nws qhov kev npaj yog complex, tus nqi yog siab, thiab nws daim ntawv thov kev lag luam yog txwv.
Xyoo 1979, Sokolowski tau ua tiav cov yeeb yaj kiab CBN uas siv cov tshuab plasma ntawm qhov kub thiab txias. Cov cuab yeej siv tau yooj yim thiab cov txheej txheem yog ib qho yooj yim rau kev siv, uas tau ua rau kev loj hlob sai. Ntau txoj hauv kev ntawm vapor deposition tau tshwm sim. Kev lig kev cai, nws feem ntau yog hais txog thermochemical vapor deposition. Cov kev sim teeb tsa feem ntau muaj cov cua sov-cov kav dej quartz thiab cov khoom siv cua sov. Lub substrate tuaj yeem ua kom sov los ntawm lub qhov cub cua sov (cov phab ntsa kub CVD) lossis siab - zaus induction cua sov (cov phab ntsa txias CVD). Cov tshuaj tiv thaiv roj decomposes rau ntawm qhov chaw siab -kub substrate thiab nkag mus rau cov tshuaj tiv thaiv rau tso ib zaj duab xis. Cov tshuaj tiv thaiv roj yog sib xyaw ntawm BCl3 lossis B2H6 thiab NH3.
Txoj kev no siv dej ua cov tshuaj tiv thaiv nruab nrab hauv qhov siab - qhov kub thiab siab - qhov chaw muaj kev kub ntxhov nyob hauv ib qho autoclave, tso cai rau cov tshuaj uas feem ntau insoluble lossis nyuaj rau yaj kom yaj. Cov tshuaj tiv thaiv kuj tuaj yeem raug recrystallization. Hydrothermal thev naus laus zis muaj ob tus yam ntxwv: thawj zaug, nws muaj qhov kub thiab txias, thiab qhov thib ob, nws tau nqa tawm hauv lub thawv kaw kom tsis txhob muaj cov khoom tiv thaiv volatilization. Raws li qhov qis-kub thiab qis- txoj kev sib txuas siab, nws yog siv los ua ke cubic BN ntawm qhov kub thiab txias.
Raws li txoj kev tawm tshiab tsis ntev los no rau kev sib xyaw ua ke qis -kub nanomaterials, benzene thermal synthesis tau txais kev saib xyuas dav. Vim nws qhov ruaj khov conjugated qauv, benzene yog ib qho hnyav heev rau solvothermal synthesis thiab tsis ntev los no tau ua tiav tiav rau hauv cov txheej txheem benzene thermal synthesis, raws li qhia nyob rau hauv cov lus sib npaug:
BCl3 + Li3N → BN + 3LiCl
Or BBr3+Li3N → BN+3LiBr
Cov tshuaj tiv thaiv kub tsuas yog 450 degree, thiab benzene thermal synthesis thev naus laus zis tuaj yeem npaj cov theem metastable uas tuaj yeem tsuas muaj nyob rau hauv cov xwm txheej huab cua thiab ultra-siab siab ntawm qhov kub thiab txias. Txoj kev no ua rau qhov qis - kub thiab qis - siab npaj ntawm cubicboron nitride hmoov. Txawm li cas los xij, txoj kev no tseem nyob rau theem kev tshawb fawb thiab yog ib txoj hauv kev uas muaj peev xwm zoo rau kev siv.
Tus kheej propagating technology
Los ntawm kev siv lub zog sab nraud los ntxias cov tshuaj tiv thaiv exothermic heev, lub kaw lus tau txais cov tshuaj tiv thaiv hauv zos los tsim cov tshuaj tiv thaiv rau pem hauv ntej (combustion yoj). Cov tshuaj tiv thaiv tau nrawm nrawm nrog kev txhawb nqa ntawm nws tus kheej tso cua sov, thiab combustion yoj kis thoob plaws hauv tag nrho cov kab ke. Txawm hais tias txoj kev no yog ib txoj kev siv tshuaj inorganic synthesis, nws tsuas yog tau tshaj tawm nyob rau xyoo tas los no rau kev sib xyaw ntawm BN.
Ion beam sputtering technology
Siv particle beam sputtering deposition technology, cov khoom sib xyaw ntawm cubic BN thiab hexagonal BN tau txais. Txawm hais tias txoj kev no muaj tsawg dua impurities, morphology ntawm cov khoom yog qhov nyuaj rau kev tswj vim qhov nyuaj ntawm kev tswj cov tshuaj tiv thaiv. Tseem muaj lub peev xwm loj rau kev txhim kho kev tshawb fawb ntawm txoj kev no.
Carbon thermal synthesis technology
Txoj kev no siv cov boric acid ua raw khoom, carbon raws li tus neeg sawv cev txo, thiab ammonia roj rau nitride BN ntawm silicon carbide nto. Cov khoom tsim tau muaj siab purity thiab zoo heev daim ntawv thov tus nqi rau kev npaj cov ntaub ntawv sib xyaw.
Laser-txoj kev txo qis qis
Siv laser los ua lub zog sab nraud los ua kom muaj kev cuam tshuam redox ntawm cov tshuaj tiv thaiv precursors thiab sib txuas B thiab N los tsim BN, tab sis txoj kev no kuj ua rau theem sib xyaw.
1. Pwm tso tawm cov neeg ua haujlwm rau cov hlau tsim thiab cov roj nplaum rau cov hlau kos duab.
2. Cov khoom siv tshwj xeeb electrolytic thiab resistive nyob rau hauv qhov kub thiab txias.
3. High kub khoom lubricants, extrusion los tiv thaiv- hnav additives, additives rau tsim ceramic composite cov ntaub ntawv, refractory cov ntaub ntawv thiab antioxidant additives, tshwj xeeb tshaj yog rau cov ntaub ntawv uas tiv thaiv molten hlau corrosion, thermal enhancement additives, thiab siab - kub resistant cov ntaub ntawv rwb thaiv tsev.
4. Thaum tshav kub kub sealing desiccants rau transistors thiab additives rau polymers xws li yas resins.
5. Nias rau hauv ntau yam duab ntawm BN cov khoom, uas yuav siv tau raws li siab -kub, siab -voltage, rwb thaiv tsev, thiab tshav kub dissipation Cheebtsam.
6. Cov khoom siv tiv thaiv cua sov hauv aerospace.
7. Nrog rau kev koom tes ntawm cov catalyst, nws tuaj yeem hloov mus rau hauv cubic BN uas nyuaj li pob zeb diamond los ntawm kev kub siab - kub thiab siab - kev kho mob siab.
8. Cov khoom siv ntawm cov atomic reactors.
9. Dav hlau nozzles rau aircraft thiab foob pob ua ntxaij cav.
10. Insulators rau siab-voltage, siab- zaus hluav taws xob thiab ntshav arcs.
11. Ntim cov ntaub ntawv uas tiv thaiv neutron hluav taws xob.
12. Cov khoom siv superhard ua tiav los ntawm BN, uas tuaj yeem siv los ua kom siab -cov cuab yeej txiav ceev thiab laum cov khoom rau kev tshawb nrhiav geological thiab roj drilling.
Tsis yog ib txwm Cyber thiab Immigration Firm
13. Cov nplhaib sib cais siv hauv metallurgy rau nruam nruam steel, ntws qhov rau amorphous hlau, thiab tso tawm cov neeg ua haujlwm rau nruam nruam txhuas (ntau yam iav optical tso tawm cov neeg ua haujlwm).
14. Ua evaporation nkoj rau ntau yam capacitor film aluminium plating, cathode ray tube aluminium plating, tso saib aluminium plating, thiab lwm yam.
15. Ntau yam tshiab- khaws cia cov hnab ntim khoom txhuas plated, thiab lwm yam.
16. Ntau yam laser los tiv thaiv- fake aluminium plating, luam ntawv kub stamping cov ntaub ntawv, ntau yam luam yeeb daim ntawv lo, npias ntawv, ntim thawv, luam yeeb ntim thawv aluminium plating, thiab lwm yam.
17. Cov tshuaj pleev ib ce yog siv los ua cov tshuaj pleev plhu, uas tsis yog - tshuaj lom, lubricating, thiab glossy.
Boron nitridetau tshaj tawm ntau tshaj 100 xyoo dhau los, nrog rau nws daim ntawv thov ntxov tshaj plaws yog hexagonal BN ua lub siab -cov roj nplua nyeem kub. Nws cov qauv thiab cov khoom zoo ib yam li graphite, thiab nws kuj yog dawb huv, yog li nws feem ntau hu ua "dawb graphite".
BN ceramics tau tshawb pom thaum ntxov li xyoo 1842. Kev tshawb fawb ntau ntawm BN cov ntaub ntawv tau ua nyob txawv teb chaws txij li Kev Tsov Rog Thoob Ntiaj Teb thib 2, thiab nws tsis yog txog xyoo 1955 uas BN kub nias txoj kev tsim. Lub Tuam Txhab Asmeskas Pob Zeb Diamond thiab United Carbon Company yog thawj zaug nkag mus rau ntau lawm, ua tau ntau tshaj 10 tons los ntawm 1960.
Xyoo 1957, RH Wentrof yog thawj tus ua tiav CBN. Xyoo 1969, General Electric tau muag nws li Borazon, thiab xyoo 1973, Tebchaws Meskas tau tshaj tawm cov cuab yeej txiav CBN.
Xyoo 1975, Nyiv tau xa cov thev naus laus zis los ntawm Tebchaws Meskas thiab tseem npaj CBN cov cuab yeej txiav.
Xyoo 1979, cov tshuab nqus ntshav plasma tau siv los ua tiav thawj zaug los npaj cov tsoos c-BN nyias zaj duab xis ntawm qhov kub thiab txias.
Thaum xyoo 1990s lig, tib neeg muaj peev xwm npaj c-BN nyias zaj duab xis siv ntau lub cev vapor deposition (PVD) thiab tshuaj vapor deposition (CVD) txoj kev.
Los ntawm kev xav hauv tsev hauv Suav teb, kev txhim kho tau ua tiav sai. Kev tshawb fawb ntawm BN hmoov pib xyoo 1963, tau tsim tiav hauv xyoo 1966, thiab tau muab tso rau hauv kev tsim khoom thiab siv hauv Tuam Tshoj txoj kev lag luam thiab kev txiav- ntug tshuab hauv xyoo 1967.
Txhua Yam Koj Yuav Tsum Paub
boron nitride siv rau dab tsi?
Boron Nitride cov khoom siv dav siv thoob plaws hauv kev lag luam xws li: Hlau thiab foundry ntau lawm. High -kub rauv manufacturing. Microelectronics thiab semiconductor industries.
Puas yog boron nitride zoo rau daim tawv nqaij?
Raws li cov khoom siv hluavtaws,nws yog tshuaj lom neeg ruaj khov thiab paub tias muaj kev nyab xeeb thiab maj mam rau daim tawv nqaij. Vim muaj cov txheej txheem tsim khoom nruj me ntsis, Tokuyama h-BN yog cov ntshiab heev, nrog me ntsis soluble boron. Ua raws li 2021 Japanese Standards of Quasi-Cov khoom xyaw tshuaj.
Puas yog boron nitride zaub mov muaj kev nyab xeeb?
Boron Nitride yog lwm txoj kev noj qab haus huv thiab kev noj qab haus huv (NSF zaub mov tiv thaiv kev nyab xeeb) rau PTFE lossis Teflon, uas tseem tuaj yeem siv los ua cov khoom siv hauv polymers vim nws cov khoom zoo heev lubrication.
Puas yog boron nitride muaj zog dua pob zeb diamond?
Nws tau tshaj tawm tias yog18%muaj zog dua pob zeb diamond. Tsuas yog qhov uas tau sau tseg, cov ntaub ntawv raug muab rau cov ntaub ntawv hauv lawv lub xeev tus qauv (ntawm 25℃[77℃F], 100 kPa). Vim yog thermal thiab tshuaj stability zoo, boron nitride ceramics yog siv nyob rau hauv siab - cov khoom kub thiab hlau casting.
Cim npe nrov: boron nitride hmoov cas 10043-11-5, lwm tus neeg, manufacturers, hoobkas, lag luam wholesale, yuav, nqe, tej, kev muag khoom