Boron Nitride hmoov

specification

khoom piav qhia

Suav lub npe: hexagonal boron nitride, boron nitride

Lub npe Askiv: Boron nitride

Cov mis mos molecular: BN

Molecular hnyav: 24.18 (raws li 1979 thoob ntiaj teb atomic hnyav)

Tus qauv zoo: 98%, 99%

Tus qauv kev lag luam: Q / YLH001-2006

PIB: 2850001200

Tus lej CAS: 10043-11-5

Tsis tshua muaj kub boron nitride yog tsim los ntawm kev sib xyaw borax thiab ammonium chloride nyob rau hauv cov tshuaj tiv thaiv rauv ntawm qhov kub thiab txias ntawm 1000-1200 ° C. Kub-kub boron nitride yog synthesized los ntawm kev sib tov boric acid thiab melamine los ntawm ib tug high-kub calcination cov tshuaj tiv thaiv ntawm 1700.

khoom nta

Boron nitride yog siv lead ua los ntawm nitrogen atoms thiab boron atoms. Cov qauv siv lead ua tau muab faib ua: hexagonal boron nitride (HBN), kaw-packed hexagonal boron nitride (WBN) thiab cubic boron nitride, ntawm cov hexagonal boron nitride crystals Cov qauv muaj cov qauv zoo sib xws graphite txheej, qhia cov hmoov dawb uas xoob. , lubricated, yooj yim nqus dej noo, thiab lub teeb hauv qhov hnyav, yog li nws tseem hu ua "dawb graphite".

Qhov ceev theoretical yog 2.27g / cm3, qhov tshwj xeeb lub ntiajteb txawj nqus yog 2.43, thiab Mohs hardness yog 2.

Hexagonal boron nitride muaj hluav taws xob zoo rwb thaiv tsev, thermal conductivity, tshuaj stability, tsis pom tseeb melting point, tshav kub tsis kam mus rau 3000 ℃ nyob rau hauv 0.1MPA nitrogen, tshav kub tsis kam mus rau 2000 ℃ nyob rau hauv ib tug nruab nrab txo qhov cua, nyob rau hauv nitrogen thiab kev khiav hauj lwm kub nyob rau hauv argon tuaj yeem ncav cuag. 2800 ℃, thiab kev ruaj ntseg hauv cov pa oxygen tsis zoo, thiab kev ua haujlwm kub qis dua 1000 ℃.

Lub expansion coefficient ntawm hexagonal boron nitride yog sib npaug ntawm quartz, tab sis cov thermal conductivity yog kaum npaug ntawm quartz. Nws kuj muaj lubricity zoo ntawm qhov kub thiab txias. Nws yog ib qho zoo heev kub-kub khoom lubricant nrog muaj zog neutron absorption muaj peev xwm, ruaj khov tshuaj, thiab tshuaj inertness yuav luag tag nrho cov hlau molten.

Hexagonal boron nitride yog insoluble hauv dej txias. Thaum cov dej boils, nws hydrolyzes qeeb heev thiab tsim 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. Nws yog me ntsis soluble hauv kub acids. Siv molten sodium hydroxide, potassium hydroxide ua rau decompose. Nws muaj peev xwm tiv thaiv corrosion rau ntau yam inorganic acids, alkalis, ntsev tov thiab cov kuab tshuaj organic.

Cov kev ntsuas

Boron Nitride Parameters

1. Kev kub siab ua haujlwm: sublimation ntawm 3000 ℃, nws lub zog yog 2 zaug ntawm chav tsev kub ntawm 1800 ℃, thiab nws yuav tsis tawg thaum txias rau chav sov rau kaum ob zaug ntawm 1500 ℃, thiab yuav tsis mos ntawm 2800 ℃ hauv tsis muaj roj.

2. High thermal conductivity: Cov khoom kub nias yog 33W / MK Zoo li cov hlau ntshiab, nws yog cov khoom siv thermally conductive hauv cov ntaub ntawv ceramic saum 530 ° C.

3. Tsawg thermal expansion coefficient: Lub expansion coefficient ntawm 2 × 10-6 yog thib ob tsuas yog quartz iav, uas yog qhov tsawg tshaj plaws ntawm ceramics. Tsis tas li ntawd, nws muaj cov thermal conductivity siab, yog li nws muaj thermal shock kuj zoo.

4. Cov khoom siv hluav taws xob zoo: zoo rwb thaiv tsev kub, 1014Ω-cm ntawm 25 ° C, thiab 103Ω-cm ntawm 2000 ° C. Nws yog qhov zoo dua cov khoom siv hluav taws xob kub zoo hauv ceramics, nrog rau qhov tawg ntawm 3KV / MV thiab qis dielectric poob ntawm 108HZ. Thaum nws yog 2.5 × 10-4, lub dielectric tas li yog 4, thiab nws muaj peev xwm kis tau microwave thiab infrared rays.

5. Zoo corrosion kuj: nrog cov hlau dav (hlau, tooj liab, txhuas, txhuas, thiab lwm yam), cov hlau tsis tshua muaj hauv ntiaj teb, cov hlau muaj txiaj ntsig, cov khoom siv semiconductor (germanium, silicon, potassium arsenide), iav, molten ntsev (crystal pob zeb, fluoride, slag), inorganic acids, alkalis tsis hnov ​​mob.

6. Tsawg coefficient ntawm kev sib txhuam: U yog 0.16, uas tsis nce ntawm qhov kub thiab txias. Nws tiv taus kub ntau dua li molybdenum disulfide thiab graphite. Cov huab cua oxidizing tuaj yeem siv txog li 900 ° C, thiab lub tshuab nqus tsev tuaj yeem siv tau txog 2000 ° C.

7. High purity: nws cov ntsiab lus impurity tsawg dua 10PPM, thiab nws cov ntsiab lus B yog ntau dua 43.6%.

8. Machinability: Nws hardness yog Mohs 2, yog li nws tuaj yeem ua tiav rau hauv qhov chaw nrog siab precision los ntawm txoj kev machining.

Scope ntawm daim ntawv thov

1. Boron nitride yog ib yam khoom uas tsis muaj tshuaj lom, kub tsis kam, corrosion kuj, siab thermal conductivity, siab rwb thaiv tsev thiab zoo heev lubricating zog.

2. Nws yog ob qho tib si hluav taws xob insulator thiab thermal conductor, tshwj xeeb electrolysis thiab cov ntaub ntawv tiv thaiv nyob rau hauv qhov kub thiab txias, insulators rau high-voltage high-frequency hluav taws xob thiab plasma arcs.

3. Nws tuaj yeem siv los ua cov khoom siv-theem doping rau semiconductors, thiab roj uas tiv taus oxidation lossis dej.

4. High-temperature lubricant thiab pwm tso tawm tus neeg sawv cev rau cov qauv, boron nitride hmoov kuj tseem siv tau los ua tus neeg sawv cev tso rau iav hlaws, thiab cov pwm tso tawm tus neeg sawv cev rau iav thiab hlau molding.

5. Cov khoom siv superhard ua tiav los ntawm boron nitride tuaj yeem ua rau hauv high-speed txiav cov cuab yeej thiab laum khoom rau geological tshawb nrhiav thiab roj drilling.

6. Cov khoom siv ntawm cov atomic reactors, nozzles ntawm aircraft thiab foob pob ua ntxaij cav, ntim cov ntaub ntawv los tiv thaiv neutron radiation, thiab cov ntaub ntawv tiv thaiv tshav kub nyob rau hauv aerospace.

7. Nws yog non-toxic thiab harmless thiab muaj lubricity, uas yuav siv tau raws li muab tub lim rau tshuaj pleev ib ce.

8. Nrog rau kev koom tes ntawm catalyst, nws tuaj yeem hloov mus rau hauv cubic boron nitride nyuaj li pob zeb diamond tom qab kub kub thiab kev kho mob siab.

9. Ua ntau yam evaporation nkoj rau capacitor zaj duab xis aluminium plating, duab raj aluminium plating, tso saib aluminium plating, thiab lwm yam.

10. Thaum tshav kub kub-sealing desiccant rau transistors thiab additives rau polymers xws li yas resins.

11. Ntau yam laser anti-counterfeiting aluminium plating, cov khoom lag luam bronzing, ntau cov ntawv luam yeeb, ntawv npias, ntim cov thawv, cov thawv luam yeeb, thiab lwm yam.