Статья. Опубликована в "Joual of materials science letters" 19
(2000)667–669, Издательство Kluwer Academic Publishers, 2000 г.
Abstract. The synthesis of titanium diboride (TiB2) by reduction of carbon-coated titania (TiO2) mixed with boron carbide (B4C) was investigated. Degussa P-25 TiO2 with a
surface area of about 50 m2/g powder and a 70/30% anatase to rutile phase, B4C with a surface area of about 18 m2/g were used as starting powders. TiO2 was coated with C by decomposing propylene (C3H6) and allowing the C to adhere to the surface of the TiO
2. This carbon coated TiO2 was then mechanically mixed with the B4C. This mixture was reacted at 1400C in ?owing argon atmosphere for the production of TiB
2. X-ray diffraction (XRD), free oxygen and carbon, BET surface area analysis, and transmission electron microscopy (TEM)were used to characterize the produced TiB2 powders. The use of the C-coated precursor resulted in TiB2 with a BET surface area of 7.3 m2/g, submicron particle size (0.7–0.9 mcm), and oxygen content of 1.66 wt% when reacted at 1400C for 2h in ?owing argon gas.
Abstract. The synthesis of titanium diboride (TiB2) by reduction of carbon-coated titania (TiO2) mixed with boron carbide (B4C) was investigated. Degussa P-25 TiO2 with a
surface area of about 50 m2/g powder and a 70/30% anatase to rutile phase, B4C with a surface area of about 18 m2/g were used as starting powders. TiO2 was coated with C by decomposing propylene (C3H6) and allowing the C to adhere to the surface of the TiO
2. This carbon coated TiO2 was then mechanically mixed with the B4C. This mixture was reacted at 1400C in ?owing argon atmosphere for the production of TiB
2. X-ray diffraction (XRD), free oxygen and carbon, BET surface area analysis, and transmission electron microscopy (TEM)were used to characterize the produced TiB2 powders. The use of the C-coated precursor resulted in TiB2 with a BET surface area of 7.3 m2/g, submicron particle size (0.7–0.9 mcm), and oxygen content of 1.66 wt% when reacted at 1400C for 2h in ?owing argon gas.