Ntawm Kev Siv Cov Khoom Boron Nitride
Dec 10, 2022
Boron nitride (BN) ceramics muaj ob BN cov ntaub ntawv nrog hexagonal thiab cubic lug. Ntawm lawv, cov qauv siv lead ua ntawm hexagonal boron nitride muaj cov qauv graphite zoo sib xws, thiab nws yog cov hmoov dawb nrog xoob, lubricated, noo noo-absorbing, lub teeb yuag zog, yog li nws tseem hu ua "dawb graphite". Theoretical ceev yog 2. 27g / cm3; Mohs hardness yog 2. Hexagonal boron nitride muaj hluav taws xob zoo rwb thaiv tsev, thermal conductivity, thiab tshuaj stability; nws tsis muaj qhov pom tseeb melting point, sublimates ntawm 3000 degree C hauv 0. IMPa nitrogen, thiab muaj qhov melting point ntawm 3000 degree C hauv inert gas. Thaum tshav kub kub txog 2000 degree, siv kub txog li 2800 degree hauv nitrogen thiab argon, tsis zoo stability nyob rau hauv oxygen, siv kub hauv qab 1000 degree. Hexagonal boron nitride yog insoluble hauv dej txias. Thaum dej boils, nws hydrolyzes qeeb heev thiab tsim ib tug me me ntawm boric acid thiab ammonia; nws tsis hnov mob nrog cov acids tsis muaj zog thiab muaj zog hauv paus ntawm chav tsev kub, thiab yog me ntsis soluble hauv cov kua qaub kub. Nws tuaj yeem kho nrog molten sodium hydroxide thiab potassium hydroxide. kom decompose. Lub coefficient ntawm expansion ntawm hexagonal boron nitride yog sib npaug rau quartz, tab sis thermal conductivity yog 10 npaug ntawm quartz. BN tsis yog tsuas yog ib tug zoo conductor ntawm tshav kub, tab sis kuj yog ib tug hluav taws xob insulator. Nws qhov hluav taws xob tawg yog 4 mus rau 5 npaug ntawm alumina, thiab nws qhov dielectric tas li yog 1/2 ntawm alumina. BN muaj kev ua haujlwm ruaj khov nyob rau hauv ultra-siab siab, thiab BN yog cov khoom siv hluav taws xob zoo tshaj plaws. Cubic BN muaj cov qauv sphalerite, muaj tshuaj lom neeg ruaj khov, zoo thermal conductivity thiab kub tsis kam, thiab nws hardness zoo ib yam li cov pob zeb diamond dag, yog li nws yog cov khoom siv zoo heev. Piv nrog cov pob zeb diamond, nws qhov txiaj ntsig zoo tshaj plaws yog tias nws tsis hnov mob nrog hlau-raws li cov hlau ntawm qhov kub thiab txias, thiab nws tuaj yeem siv rau qhov kub ntawm 1400 degree.
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Siv
Hexagonal boron nitride muaj cov txheej txheem siv lead ua zoo ib yam li graphite, thiab muaj lubricity zoo thiab thermal conductivity. Nyob rau tib lub sijhawm, hexagonal boron nitride kuj yog cov khoom siv raw rau kev sib xyaw ntawm cubic boron nitride. Cubic boron nitride muaj lub cev zoo thiab tshuaj lom neeg, thiab nws qhov hardness yog thib ob tsuas yog pob zeb diamond. Cubic boron nitride feem ntau yog siv los ua cov ntaub ntawv qib siab refractory, superhard hnav-tiv taus cov ntaub ntawv, thiab cov ntaub ntawv superhard ua los ntawm boron nitride tuaj yeem ua rau cov cuab yeej siv high-speed txiav thiab laum cov khoom rau kev tshawb nrhiav geological thiab roj drilling. Txij li thaum cubic boron nitride kuj muaj cov thermal conductivity thiab cov khoom siv hluav taws xob zoo, nws kuj yog cov khoom siv semiconductor uas muaj qhov kub thiab txias, thiab tau siv dav hauv kev lag luam optoelectronics thiab microelectronics. Tsis tas li ntawd, boron nitride tuaj yeem siv los tsim TiB2 / BN composite ceramics, tso tawm tus neeg sawv cev rau kev tsim hlau, roj nplua nyeem rau cov hlau hlau kos duab thiab cov txheej kub kub, ua kom muaj cua sov ntxiv thiab cov khoom siv kub-resistant insulating nyob rau hauv rooj plaub. ntawm anti-corrosion ntawm molten hlau. Siv ua semiconductor silicon doping qhov chaw. Hauv kev lag luam aviation thiab lwm yam lag luam, nws tuaj yeem siv los ua cov khoom siv tiv thaiv tshav kub hauv aerospace, cov khoom siv rau atomic reactors, insulators rau high-voltage high-frequency hluav taws xob thiab ntshav arcs.
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txoj kev khaws cia
Ntim rau hauv ib lub hnab yas polyethylene. Nws yuav tsum tau muab cia rau hauv ib qho chaw zoo-ventilated qhuav warehouse kom tsis txhob ya raws. Nws yuav tsum tau ntim rau hauv lub thawv ntoo thaum lub sij hawm thauj mus los kom tsis txhob muaj kev puas tsuaj los ntawm kev ya raws.
Tiv tauj peb: Tel: ntxiv rau 8618560961205
Email:sales@zbsyxc.com
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