Boron Nitride Ceramic Thiab Daim Ntawv Thov
Mar 03, 2022
Boron nitride ceramics yog ua los ntawm boron nitride hmoov los ntawm kub nias thiab sintering ntawm qhov kub thiab txias, thiab tom qab ntawd ua tiav raws li qhov loj me thiab cov lus qhia tshwj xeeb los ntawm cov neeg siv khoom.
Boron nitride, tseem hu ua dawb graphite, zoo ib yam li graphite nyob rau hauv cov qauv, teej tug mus rau daim ntawv hexagonal qauv, theoretical ceev ntawm 2.27g / cm3, Mohs hardness ntawm 2. Zoo hluav taws xob rwb thaiv tsev, thermal conductivity, zoo heev tshav kub tsis kam, tshuaj stability. , thiab zoo noo noo tsis kam rau molten hlau, slag thiab iav.
Boron nitride ceramics muaj cov khoom siv zoo heev thiab tuaj yeem ua rau cov duab nyuaj raws li cov neeg siv khoom xav tau.
Boron nitride ceramics tiv taus cov kua qaub thiab alkali corrosion thiab muaj zog hluav taws xob rwb thaiv tsev, thiab hluav taws xob tawg tsis kam yog 3-4 npaug ntawm alumina.
Boron nitride ceramics muaj qhov kub thiab txias tsis kam, mus txog 1800 degree hauv lub tshuab nqus tsev thiab 2100 degree hauv kev tiv thaiv nitrogen.
Boron nitride ceramics yog cov resistant rau thermal shock thiab yuav tsis tawg nyob rau hauv 1500 degree quench los yog 20 feeb nyob rau hauv 1000 degree cub tawg tom qab raug tshem tawm ntawm huab cua thiab tsis tu ncua txias rau ntau pua lub sij hawm.
Boron nitride ceramics thiab ntau cov hlau, ceramics, cov ntaub ntawv tsis tshua muaj hauv ntiaj teb tsis hnov mob, tsis txhob sib xyaw. Xws li ferrous hlau, hlau, tooj liab, stainless hlau, bismuth, txhuas, tin, chromium, lead, npib tsib xee, magnesium thiab lwm yam; Iav yaj, sodium iav, cryolite, thiab lwm yam Silicon lava: slag, fluoride, thiab lwm yam., tuaj yeem siv los ua ntim, crucible, hlawv phaj, thiab lwm yam.
Kev ceev faj rau kev siv boron nitride ceramics
1. Qhov kub ntawm huab cua yuav tsum tsis pub tshaj 1000 degree. Qhov saum npoo ntawm boron nitride nyob rau hauv kev sib cuag nrog oxygen yuav oxidize thiab flake tawm.2. Boron nitride absorbs dej yooj yim. Crucible yuav tsum tsis txhob muab cia rau hauv qhov chaw ntub dej thiab yuav tsum tsis txhob muab yaug nrog dej, tab sis tuaj yeem so ncaj qha nrog ntawv xuab zeb lossis wiped nrog cawv.
