Kev siv qhov kub thiab txias ntawm boron nitride ceramic crucible hauv qab nqus tsev yog 1800 degrees, thiab siv ntsuas kub hauv qab qhov chaw tiv thaiv yog 2100 degrees. Nitrogen lossis argon huab cua zoo tshaj yog siv thiab muaj lub sijhawm ua haujlwm ntev. Lub boron nitride crucible yog muaj zog tiv thaiv kev kub siab. Nws tsis tawg thaum quenched ntawm 1500 degrees. Nws muab tso rau hauv 1000-degree rauv taws rau 20 feeb thiab nqa tawm los tshuab thiab tua rau ntau pua zaug ua ke tsis muaj kev tawg.
Ceev faj rau kev siv:
1 Kev siv qhov kub thiab txias hauv huab cua yuav tsum tsis pub tshaj 1000 degrees, thiab saum npoo ntawm boron nitride uas ntau tshaj 1000 degrees yuav oxidize thiab tev tawm thaum nws tau chwv nrog oxygen.
2 Boron nitride tau yooj yim kom nqus dej noo. Qhov crucible tsis tuaj yeem khaws cia hauv qhov chaw ntub thiab tsis tuaj yeem ntxuav nrog dej. Nws tuaj yeem muab ncaj qha nrog ntawv xuab zeb los yog nrog cawv.
3 Daim ntawv thov kev taw qhia ntawm boron nitride crucible
[muaj ntaub ntawv]:
1. Lub cev muaj hlau: hlau, tooj, txhuas, npib tsib xee, magnesium, bismuth, zinc, thiab lwm yam, cov hlau nplaum FE-CO-NI-SI CO-ZR-NB
2. Tsis nyob rau hauv chav tsev Kev cuam tshuam nrog dej thiab kua qaub. Hau nrog dej thiab maj mam hydrolyzed los tsim boric acid thiab ammonia
3. Tsis tshua muaj lub ntiaj teb, nitride
[khoom siv tsis raug]:
1. Antimony trioxide, chromium oxychloride, molybdenum trioxide, arsenic trioxide, titanium carbide, thiab lwm yam. 2. Cov iav siab ua rau lub ntsej muag ci yaj nyob rau hauv huab cua ntawm 800-950 degrees yuav tawm tsam BN, tab sis tsis muaj tshuaj tiv thaiv los ntawm kev tiv thaiv nitrogen los sis inert gas. 3. Boron phosphate erodes boron nitride nyob rau hauv nitrogen ntawm 1400 degrees, thiab reacts nrog kub concentrated los yog molten alkali thiab kub chlorine roj.
