Boron Nitride Crucible China

Ceramic crucibles ua los ntawm hexagonal boron nitride ua lub luag haujlwm tseem ceeb hauv kev tsim khoom lag luam. Hauv kev tsim cov txheej txheem thiab cov txheej txheem kub kub ntau dua (xws li cov siv nyob rau hauv kev tsim cov khoom siv hlau) yuav tsum ua haujlwm zoo dua li lawv tau ib txwm muaj. Cov no yog cov yam ntxwv tseem ceeb tshaj plaws ntawm cov chaw tsim khoom zoo tshaj plaws: kev ua tau zoo dua, ntau yam khoom siv zoo dua qub, thiab tshuaj lom neeg thiab thermal tiv thaiv ntawm cov tshuab tsim. Vim yog qhov tseem ceeb, nws yog ib qho tseem ceeb kom tsis txhob xwm yeem los ntawm cov khoom siv hlau' melts los ntawm kev ua raws li cov phab ntsa pwm, thiab txhawm rau tiv thaiv cov khoom sib kis tsis sib xws los ntawm yaj. Kub hlau zoo li txhuas tuaj yeem ua raws li, tawm tsam pwm phab ntsa, thiab txawm tias muaj qhov cuam tshuam, txhua tus tuaj yeem ua rau tsis ua tiav, qhov no yog vim li cas Hexagonal Boron Nitride Crucible yog ib qho ntawm cov khoom siv tshiab uas ua tiav cov kev xav tau no.

Cov khoom siv ntawm BN crucible yog zoo li cov tsoos graphite, uas muaj cov txheej txheem hexagonal lattice, ntxiv rau cov nyhuv uas xav tau lubrication thiab ua kom zoo. Txawm li cas los xij, thaum lub graphite tsis cuam tshuam ntawm qhov kub txog li 1,000 degree C / 1,832 degree F, boron nitride kev sib txhuam cov haujlwm tau tuav ruaj khov ntawm lub sijhawm no. kev mob thaum siv cov hlau yaj thiab casting. Txij li nws ua haujlwm zoo nyob rau hauv siab kub, nws yog haum raws li lub siab-ruaj khov crucible, piv txwv li, crucible liner rau e-beam evaporation. Boron nitride yuav tsis muaj kev cuam tshuam los ntawm cov mob no vim tias nws tsis cuam tshuam nrog graphite. Vim muaj cov khoom sib cais zoo heev, tshwj xeeb yog piv rau txhuas yaj, lawv tau tus yam ntxwv. Ua kom zoo dua cov hlau molten tsis ua raws li cov phab ntsa ntawm pwm thiab txhawb kev ua kom cov hlau molten rau txheej txheej pwm yuav pab ua kom cov phab ntsa tsis tuaj pwm ntawm molten hlau. Cov khoom siv hauv tshwj xeeb txwv tsis pub lub pwm ua kom phab ntsa tsis zoo, kom tag nrho cov khoom lag luam' kev pab lub neej.

Cov Nta Muaj

Tsis ntub-los ntawm hlau tsis muaj hlau	√ cov tsis xeb hluav taws xob	Yooj yim tso tawm thiab ntxuav
Siv lub qhov kub siab heev	√ qis coefficient ntawm thermal nthuav	√ koj thermal poob siab ua hauj

Cov Khoom Muaj Khoom Siv

TSWV YIM	UNITIT	BN-2000	BN-2300	BN-2500	BN-2800
Cov ntsiab lus tseem ceeb	-	BN> 99%	BN + Al₂O₃	BN + SiC	BN + AlN
Cov ntawv sawv	-	B₂O₃	B₂O₃	B₂O₃	B₂O₃
Xim	-	dawb	lub teeb txho	tsaus grey	tsaus grey
Qhov ceev	g / cm³	1.95 - 2.00	2.25 - 2.35	2.40 - 2.50	2.75 - 2.85
Lub Neej Ua Tau Zoo	Mpa	30	65	80	85
Hlob Lub Zog	Mpa	55	145	175	205
Kev Siv Hluav Taws Xob	Ω · cm	GG gt; 10¹⁴	GG gt; 10¹³	GG gt; 10¹²	GG gt; 10¹³
Max. Kub ua hauj lwm (huab cua)	℃	900	1,000	1,000	1,000
Max. Ua Haujlwm Kub (nqus)	℃	1,900	1,750	1,750	1,800
Max. Kub ua hauj lwm (inert)	℃	2,000	1,750	1,750	1,800
Thermal Kev Coj Ua	W/m.K	35	30	40	85
Thermal Expansion Coefficient (25 - 1,000 ℃)	10^-6/K	1.5	2.0	2.8	2.8

Data Cov ntaub ntawv saum toj no yog qhia rau kev siv thiab sib piv xwb, cov ntaub ntawv qhia kiag yuav txawv nyob ntawm kev tsim khoom thiab ntu kev teeb tsa.

Cov Ntaub Ntawv Ntxiv

Tom qab boron nitride ceramic crucible tau siv ntev, cov khoom tawg yooj yim tuaj yeem nkag mus rau nws cov nplaim, thiab nws nyuaj rau ntxuav nws nrog cov hau kev dav. Raws li qhov tshwm sim, ib tus neeg hla tawm yuav tsum tau ua rau txhua cov khoom siv molten uas xav kom muaj cov siab huv. Ceramic crucibles ua los ntawm boron nitride ib txwm tau kim. Siv qhov sib xyaw ntawm cov tshuaj sulfuric acid, muaj cov nitric acid thiab hydrofluoric acid nrog qhov ntim ntawm 1: 1: 1 thiab 60% caustic soda (NaOH) tov rau corrode thiab tev tawm ntawm nto ntawm BN ceramic crucible, txoj kev no tuaj yeem ntxuav BN (Boron Nitride) crucible tsis tau tawm hauv kev ua kom tsis huv, kom nws tuaj yeem siv ntau zaus rau yaj cov khoom sib txawv thiab txo nqi.

Cim npe nrov: boron nitride crucible, Suav teb, cov chaw muag khoom, chaw tsim khoom, hoobkas

Khoom

Boron Nitride Ntsia Duab