Boron Nitride Production Method

Segondè tanperati segondè sentèz sentèz metòd
In 1957, Wentorf first artificially synthesized cubic BN. When the temperature is close to or above 1700 degree and the minimum pressure is 11~12GPa, pure hexagonal boron nitride (HBN) is directly transformed into cubic boron nitride (CBN). Later, people found that the use of catalysts can greatly reduce the transformation temperature and pressure. Commonly used catalysts are: alkali and alkaline earth metals, alkali and alkaline earth nitrides, alkaline earth fluoronitrides, ammonium borate salts and inorganic fluorides. Among them, the temperature and pressure required for ammonium borate salt as a catalyst are the lowest. The required pressure is 5GPa at 1500 degree , and the temperature range is 600~700 degree when the pressure is 6GPa. It can be seen that although the addition of catalysts can greatly reduce the transformation temperature and pressure, the required temperature and pressure are still relatively high. Therefore, the equipment for its preparation is complex and the cost is high, and its industrial application is limited.
Pwodui chimik vapor synthesis metòd
Nan 1979% 2c Sokolowski avèk siksè itilize batman teknoloji prepare cubic boron nitride (CBN) film nan ba tanperati ak ba pressure. Ekipman senp apliman, soo li te devlope rapidman. A varyete vapor depo metòd gen parèt. Tradisyonèlman, sitou refers tèrmal pwodui chimik depoze. The eksperimantal aparèy jeneralman konpoze a chalè-rezistan quartz tube ak chofaj aparèy. Substra ka chofaj a chofaj furnace (cho wall CVD) segondè-frekans chofaj (frèt miray CVD). Reyaksyon dekonpoze surf la segondè-tanperati a substra, ak yon pwodwi chimik reyaksyon rive menm depo depoze reyaksyon reyaksyon melanj bCL3 oswa B2H4 ak NH3.
Hydrothermal sentèz metòd
Sa a metòd itilize dlo kòm reyaksyon reyaksyon insoluble a segondè-tanperati, segondè-presyon reyaksyon anviwònman an autoclave, anjeneral insoluble oswa ensoluble sibstans yo fonn, ak reyaksyon an kapab recrystallized. Hydrothermal teknoloji gen de karakteristik. li yo relativman low tanperati, se li li te pote soti nan yon fèmen evite evite evite volatilizasyon. As a ki ba-tanperati ak ki ba-presyon sentèz metòd, li itilize sentèz sentèz kib boron nitride nan ba tanperati.
Benzene tèrmal synthesis metòd
Kòm a ki ba-tanperati nanomaterial sentèz metòd ke gen parèt resan ane, benzene tèrmal synthesis te resevwa toupatou attention. lis konjuged estrikti estrikti, benzene se yon ekselan solvay pou solvay tèrmal synthesis. Recently, li te te te avèk siksè devlope nan benzene tèrmal sentetizè teknoloji reyaksyon fòmil 3a:
BCL{{0}li3N→BN{{2}liCl
oswa BBr3+Li3N→BN{2}}LiBr
Reyaksyon tanperati se 450 degre Benzene tèrmal sentèz teknoloji prepare metastable faz ka dwe jwenn anba ekstrèm kondisyon egziste anba ultra-wo presyon relatively low tanperati ak presyon. Sa a Metòd reyalize preparasyon cubic boron nitride nan low low tanperati ak ba pressure. Severe, sa a metòd nan eksperimantal rechèch etap ak a sentèz aplikasyon potansyèl.
Pwopagasyon pwòp tèt ou teknoloji

Carbon tèmik sentèz teknoloji
Sa a metòd itilize boric asid as raw materyèl, carbon kòm diminye ajan, ak ammonia nitride sou sifas la silicon carbide jwenn boron nitride. The product pite aplikasyon preparasyon konpoze materyèl.
Ion beam sputtering teknoloji
Sèvi ak patikil beam sputtering depozisyon teknoloji, a melanje cubic boron nitride ak hexagonal boron nitride se sa a metòd gen mwens impurit%nan morphology nan product a difikilte kontwòl controlling reyaksyon reyaksyon Gen gwo potansyèl potansyèl devlopman sa a metòd.
Lazè induit rediksyon metòd
Sèvi ak lazè kòm yon ekstèn enèji enèji induce redox reyaksyon reyaksyon precursors, combine B boron nitride, men metòd jwenn jwenn melanje faz 5b5]