Vapor phase alumina powder with reduced moisture content

• Main Authors: LYGIN ALEXANDER, MENZEL FRANK, GIESSELER MAREIKE, GOLCHERT, RAINER
• Format: Patent
• Language: Chinese; English
• Published: 02.01.2024
• Subjects: CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; INORGANIC CHEMISTRY; METALLURGY

The present invention discloses a non-surface-modified gas phase alumina powder comprising less than 5% by weight of alpha-Al2O3, having a number average particle size d50 of less than 5 [mu] m as determined by XRD analysis, the number average particle size d50 being determined by SLS, the number average particle size d50 being less than 5 [mu] m, the number average particle size d50 being less than 5 [mu] m, the number average particle size d50 being less than 5 [mu] m, the number average particle size d50 being less than 5 [mu] m, the number average particle size and a ratio of water content KF150 to BET surface area R150 = KF150/BET of not more than 0.0122 wt% * g/m2, the water content KF150 being determined by Karl Fischer titration after drying the fumed alumina powder at 150 DEG C for 2 hours. 本发明公开了未经表面改性的气相法氧化铝粉末、其制备方法和用途，所述未经表面改性的气相法氧化铝粉末包含小于5重量％的α-Al2O3，通过XRD分析测定，具有小于5μm的数均粒径d50，该数均粒径d50通过SLS测定，以及不超过0.0122重量％×g/m2的水含量KF150与其BET表面积的比率R150＝KF150/BET，所述水含量KF150在150℃下干燥所述气相法氧化铝粉末2小时后通过卡尔·费歇尔滴定法测定。