Boron Nitride: Dawb Graphene Powering Next -Tsev Kawm Ntawv

1. Boron Nitride yog dab tsi?

Boron Nitride nthuav tawm ntau cov polymorphs, zoo ib yam li cov pa roj carbon, nrog rau qhov tseem ceeb tshaj plaws:

1. Hexagonal Boron Nitride (h-BN): Qhov no yog feem ntau thiab graphitic-zoo li daim ntawv, tau txais nws lub npe menyuam yaus "dawb graphene." Nws cov txheej txheem txheej txheem muaj boron thiab nitrogen atoms teem rau hauv hexagonal honeycomb lattice nyob rau hauv txhua txheej, nrog tsis muaj zog van der Waals rog tuav cov khaubncaws sab nraud povtseg. h-BN yog mos, zoo heev lubricant, thiab ib tug zoo thermal conductor thaum uas yog ib tug hluav taws xob insulator.
2. Cubic Boron Nitride (c-BN): Cov qauv no zoo ib yam rau pob zeb diamond thiab yog cov khoom siv nyuaj tshaj plaws thib ob tom qab pob zeb diamond. Tsis zoo li pob zeb diamond, c-BN tsis hnov ​​​​mob nrog hlau- raws li cov hlau ntawm qhov kub thiab txias, ua rau nws zoo tagnrho rau kev siv cov khoom siv ferrous.
3. Wurtzite Boron Nitride (w-BN): Zoo ib yam li c-BN, qhov tsis tshua muaj polymorph no kuj muaj qhov tawv tawv heev.

Ntawm cov no, Hexagonal Boron Nitride (h-BN) yog qhov tseem ceeb ntawm kev tshawb fawb thiab kev siv feem ntau vim nws cov txheeb ze yooj yim ntawm kev sib txuas thiab siv ntau yam.

2. Exceptional Properties ntawm Boron Nitride

Kev siv dav dav ntawm Boron Nitride stems los ntawm nws cov khoom zoo ntawm lub cev thiab tshuaj lom neeg:

· Siab-Tsub stability: Nws tuaj yeem tiv taus qhov kub txog li 3000℃nyob rau hauv ib qho chaw inert tsis yaj lossis decomposing.
· Cov khoom siv hluav taws xob zoo heev: h-BN yog cov khoom siv hluav taws xob zoo thaum ua hluav taws xob hluav taws xob, qhov sib xyaw tsis tshua muaj thiab muaj txiaj ntsig.
· Superior Hluav taws xob rwb thaiv tsev: Nws muaj lub siab tawg lub zog thiab ntim resistivity.
· Lubricity zoo: Nws cov txheej txheem txheej muab nws cov coefficient ntawm kev sib txhuam, ua rau nws ua tau zoo lubricant nyob rau hauv siab - kub thiab siab - ib puag ncig siab.
· Muaj zog chemical inertness: Nws yog heev resistant rau feem ntau molten hlau, slags, tsom iav, acids, thiab alkalis.
· Tsawg Dielectric Constant thiab Poob: Qhov no ua rau nws zoo heev rau kev siv hluav taws xob ntau zaus -.
· Neutron Absorption Capability: Lub Boron -10 isotope muaj lub siab thermal neutron capture cross-section, ua rau nws muaj txiaj ntsig zoo hauv kev lag luam nuclear.

3. Dav -Ranging Applications of Boron Nitride

Kev siv cov khoom no, Boron Nitride plays lub luag haujlwm tseem ceeb hauv ntau qhov chaw siab tshaj:

1. Electronics thiab Semiconductors

· Cov Khoom Siv Thermal Management: Siv los ua cov khoom siv hauv polymers, ceramics, lossis hlau matrix composites los tsim cov thermally conductive tsis tau hluav taws xob insulating cua sov dab dej, substrates, thiab encapsulation cov ntaub ntawv rau 5G kev sib txuas lus, LEDs, CPUs, thiab GPUs.
· 2D Insulating Substrate: h-BN nanosheets yog ib qho zoo tagnrho substrate rau graphene thiab lwm yam ob-dimensional electronic devices, pab khaws cia lawv cov cab kuj siab thiab txhim khu kev qha.
· Sib sib zog nqus-Ultraviolet Light Emission & Detection: h-BN tuaj yeem tsim kho kom muaj qhov ncaj qha bandgap, ua rau nws siv hauv qhov sib sib zog nqus-ultraviolet (DUV) lasers thiab ntes rau cov ntawv thov hauv kev ua kom tsis muaj menyuam, kev kho mob, thiab tsis yog - kab- ntawm {5}sight

2. Siab -Qhov kub thiab txias ib puag ncig

· High-Lubricant Kub: Siv los ua cov hmoov los yog txheej los muab lubrication zoo nyob rau hauv siab -kub, siab -load, los yog lub tshuab nqus tsev uas cov kua lubricants tsis ua hauj lwm (xws li, aerospace engines, metallurgical pwm).
· Refractories thiab Crucibles: Siv rau hauv ob sab phlu siab -kub rauv, crucibles rau melting thiab evaporating hlau, siv lead ua loj hlob, thiab iav fiber ntau lawm vim nws tsis yog -reactivity nrog feem ntau melts.
· Thermal Spray Coatings: Applied to metal surfaces to create protection coatings that are heat-resistant, corrosion{1}}resistant, oxidation{2}}resistant, thiab hluav taws xob rwb thaiv tsev.

3. Kev lag luam tshuaj thiab khoom siv

· Corrosion-Resistant Cheebtsam: Siv los tsim cov ntsaws ruaj ruaj, li qub, thiab qhov chaw rau cov twj siv tshuaj corrosive.
· Composite Reinforcement: Ntxiv rau cov ceramics, resins, los yog hlau los txhim kho lawv cov thermal conductivity, mechanical zog, thiab kub tsis kam ib txhij.

4. Tshuaj pleev ib ce thiab kho tus kheej

· "Soft Focus" Effect: Zoo h-BN hmoov muaj lub teeb tshwj xeeb- tawg muaj peev xwm. Thaum ntxiv rau hauv lub hauv paus thiab lub ntsej muag hmoov, nws yuav pab kom plooj cov kab zoo thiab qhov hws, tsim kom muaj qhov muag muag - tsom kwm cov nyhuv uas txhim kho qhov tsos, thiab yog daim tawv nqaij - tus phooj ywg

5. Kev lag luam Nuclear

· Neutron Absorption thiab Control Rods: Nws cov ntsiab lus boron yog siv nyob rau hauv nuclear reactor tswj rods, shielding cov ntaub ntawv, thiab pov tseg cov hlab ntsha.

4. Xaus thiab Outlook

Boron Nitride, tshwj xeeb tshaj yog Hexagonal Boron Nitride, tau kos tawm ib qho tseem ceeb niche nyob rau hauv cov teb siab heev uas cov khoom siv tsoos luv luv, ua tsaug rau nws cov cuab yeej tshwj xeeb matrix-"thermally conductive but electronicly insulating," "heat-resistant tseem lubricating." Los ntawm txias cov chips hauv peb lub xov tooj smartphones los tiv thaiv lub dav hlau thaum huab cua re- nkag; los ntawm kev ua kom muaj txiaj ntsig zoo dua UV kom tsis muaj menyuam kom muab peb cov tshuaj pleev ib ce niaj hnub ua kom tiav, qhov muaj ntawm Boron Nitride yog dav thiab loj hlob. Raws li cov txheej txheem kev sib txuas ua ntej thiab cov nqi txo qis, qhov "dawb graphene" tau npaj los qhib cov ntawv thov hloov pauv ntau dua, ua kom nws lub luag haujlwm ua cov khoom siv hauv paus rau kev hloov kho thev naus laus zis ntxiv.