Vim li cas Boron Nitride hu ua 'White Diamond'?

Boron nitride (BN) ceramics tau pom thawj zaug hauv xyoo 1842, tab sis nws tsis yog txog xyoo 1955, tom qab Tsov Rog Ntiaj Teb thib 2, thaum cov kws tshawb fawb tau daws nws cov txheej txheem kub kub, uas lawv pib tshawb fawb thiab siv boron nitride.

Nyob rau sab nraud, US Pob Zeb Diamond Corporation thiab United Carbon Corporation yog thawj zaug muab tso rau hauv kev tsim cov boron nitride, thiab los ntawm 1960, lawv cov khoom tau tshaj 10 tons. Tom qab ntawd, Nyiv tau pib xa cov khoom lag luam ntau ntawm US boron nitride thiab ua tiav hauv kev sim ntau lawm thaum ntxov 1969 thiab pib ua lag luam hauv xyoo 1970.

Hauv tsev, Tuam Tshoj pib tshawb fawb txog boron nitride hmoov nyob rau hauv 1963, thiab thaum kawg tsim nws ntse nyob rau hauv 1966 thiab muab tso rau hauv ntau lawm nyob rau hauv 1967. Txij thaum ntawd los, boron nitride tau siv nyob rau hauv Tuam Tshoj txoj kev lag luam thiab boron nitride ceramics multifunctional lub cev thiab tshuaj zog.

(1) Cov khoom siv hluav taws xob: cov khoom siv boron nitride tuaj yeem siv rau hauv qhov chaw oxidizing ntawm li 1000 degree thiab nyob rau hauv ib qho chaw inert ntawm ze li ntawm 3000 degree. Cov khoom boron nitride tuaj yeem siv rau hauv qhov chaw oxidizing ntawm li 1000 degree thiab nyob rau hauv ib qho chaw inert ntawm ze li ntawm 3000 degree. Cov cuab yeej no tshaj li mullite, alumina thiab silicon carbide refractory cov ntaub ntawv refractory. Nyob rau tib lub sijhawm, lub thermal shock kuj yog loj, nyob rau hauv 1500 degree ntawm ceev ceev cua txias thiab cua sov ib puag ncig yuav tsis tsim rupture.

(2) kev ruaj ntseg tshuaj: nrog rau feem ntau ntawm cov hlau xws li kua hlau, txhuas, tooj liab, silicon, potassium arsenide, tooj dag thiab cryolite, thiab lwm yam. tsis ua lub luag haujlwm, slag iav kuj zoo ib yam, yog li cov ntaub ntawv boron nitride ua. ntawm cov thawv tuaj yeem siv los ua lub nkoj rau cov khoom saum toj no. Tab sis feem ntau muaj B2O3 nrog hygroscopicity, uas ua rau cov khoom siv nyob rau hauv cov txheej txheem ntawm cov cua kub ceev yuav nqus mus rau hauv cov dej ntws tawm, thiab tom qab ntawd tsim cov kab nrib pleb, txhim kho qhov tsis zoo no ntawm ib qho kev ntsuas zoo tuaj yeem sib xyaw nrog qee tus neeg sawv cev.

(3) cov khoom hluav taws xob: vim BN cov khoom dielectric tas li thiab dielectric poob yog me me, tuaj yeem siv dav hauv ntau qhov ntau thiab tsawg zaus. Nws lub zog dielectric yog 4.5 npaug ntawm alumina, dielectric tas li yog ib nrab ntawm alumina, cov khoom siv hluav taws xob nrog graphite yog qhov sib txawv loj, nrog oxide ceramics ntawm qhov kub thiab txias uas tsis yog-conductive, yog cov khoom siv hluav taws xob insulating tuaj yeem siv dav. qhov kub thiab txias.

(4) machining kev ua tau zoo: boron nitride muaj Mohs hardness ntawm ob, tuaj yeem ua tiav hauv tshuab dhos, milling tshuab thiab lwm yam khoom siv. Nws tuaj yeem ua tiav rau hauv nyias slices, spirals thiab ntau yam ntawm cov duab zoo. Txawm hais tias superior rau graphite ntawm chav tsev kub, tab sis lub zog txhua yam ntawm boron nitride yog qhov tsawg, nkig ntau dua li oxide ceramics.

(5) Lubricity: Boron nitride hmoov yog dawb flake zoo li micro-zoo khoom, feem ntau hu ua "dawb graphite". Zoo ib yam li graphite, boron nitride muaj cov khoom zoo lubricating, tuaj yeem siv los ua cov khoom siv roj lubricating kub, tshwj xeeb tshaj yog rau kev sib txhuam kub thiab hnav ib puag ncig.

(6) Lub teeb yuag: Boron nitride yog cov khoom siv sib xws ntawm cov ntaub ntawv ceramic, nrog qhov ntom ntom. Qhov no ua rau nws zoo tagnrho hauv cov xwm txheej uas yuav tsum muaj lub nra hnyav, xws li hauv aerospace.

(7) Cov Khoom Siv rau Neutron Absorption: Boron nitride muaj qhov loj ntawm neutron absorption cross-section thiab yog li muaj peev xwm tseem ceeb rau kev siv hauv nuclear zog. Nws tuaj yeem siv los ua cov khoom siv neutron-absorbing rau kev tswj cov neutron flow thaum lub sij hawm nuclear fission tshua kom muaj kev nyab xeeb.

Boron nitride yog ib qho tshwj xeeb thiab ntau yam khoom siv ceramic hu ua "dawb pob zeb diamond". Nws txoj kev loj hlob keeb kwm tau dhau mus ntev ntawm kev tshawb fawb thiab kev siv, thiab nws ua lub luag haujlwm tseem ceeb hauv kev lag luam thiab kev siv thev naus laus zis los ntawm txawv teb chaws mus rau hauv tsev.

Boron nitride muaj ib tug xov tooj ntawm cov khoom zoo heev nrog rau cov khoom zoo thermal, tshuaj stability, hluav taws xob zog, machinability, lubrication, lub teeb yuag thiab neutron absorption. Qhov no tau coj mus rau ntau yam kev siv rau boron nitride hauv cov khoom siv refractory, cov khoom siv hluav taws xob insulating, cov khoom siv lubricating kub kub, cov khoom siv hluav taws xob, thiab lub zog nuclear. Nws ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm kev siv thev naus laus zis.

Shengyang New Material Co., Ltd. tau cog lus rau kev tsim cov boron nitride thiab boron nitride ua cov khoom, thiab tuaj yeem kho ntau yam boron nitride insulating ceramic qhov chaw raws li cov neeg siv khoom xav tau. Tiv tauj peb yog tias tsim nyog.
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