At present,the most common preparation method of amorphous boron powder is magnesium thermal reduction method,but the amorphous boron powder obtained by this method mostly contains impurities such as magnesium and oxy...At present,the most common preparation method of amorphous boron powder is magnesium thermal reduction method,but the amorphous boron powder obtained by this method mostly contains impurities such as magnesium and oxygen which are difficult to remove,and these impurities will seriously affect the application of amorphous boron powder and need to be strictly removed.In this research,the acid-insoluble impurities were modified through sintering and quenching,while the magnesium impurities were optimized via ultrasonic acid leaching.We observed that the quenching temperature played a crucial role in determining the efficiency of magnesium impurity removal.The results show that the magnesium content in amorphous boron powder can be reduced from 5.67%to 2.40%by quenching the amorphous boron powder at 800°C and using ultrasonic assisted acid leaching.Furthermore,the oxidation reaction of boron is influenced by the powder's particle size and specific surface area,with the effective activation energy being intimately tied to both these factors.Post-quenching and acid leaching,we observed an increase in the specific surface area of the boron powder samples,leading to enhanced activity.In conclusion,our study presents an effective strategy to mitigate magnesium impurities and elevate the performance of amorphous boron powder,offering promising avenues for advancing its utilization across diverse industries.展开更多
基金support on this research from the Talent Training Program of Yunnan of China(Grant Nos.202005AC160041 and KKXY202252002)the"Xingdian Talent"Industry Innovation Talent Program in Yunnan Province(Grant No.XDYC-CYCX-2022-0042)。
文摘At present,the most common preparation method of amorphous boron powder is magnesium thermal reduction method,but the amorphous boron powder obtained by this method mostly contains impurities such as magnesium and oxygen which are difficult to remove,and these impurities will seriously affect the application of amorphous boron powder and need to be strictly removed.In this research,the acid-insoluble impurities were modified through sintering and quenching,while the magnesium impurities were optimized via ultrasonic acid leaching.We observed that the quenching temperature played a crucial role in determining the efficiency of magnesium impurity removal.The results show that the magnesium content in amorphous boron powder can be reduced from 5.67%to 2.40%by quenching the amorphous boron powder at 800°C and using ultrasonic assisted acid leaching.Furthermore,the oxidation reaction of boron is influenced by the powder's particle size and specific surface area,with the effective activation energy being intimately tied to both these factors.Post-quenching and acid leaching,we observed an increase in the specific surface area of the boron powder samples,leading to enhanced activity.In conclusion,our study presents an effective strategy to mitigate magnesium impurities and elevate the performance of amorphous boron powder,offering promising avenues for advancing its utilization across diverse industries.
基金Foundation item:Project(2022YFC2904204)supported by the National Key R&D Program of ChinaProjects(52364048,52004115)supported by the National Natural Science Foundation of China+5 种基金Projects(202101BE070001-019,202101AT070116,202001AU070045)supported by the Yunnan Fundamental Research Projects,ChinaProject(2020)supported by the Yang Bin Scientist Studio of Yunnan Province,ChinaProject(2022)supported by the Yunnan Talents Support Project,ChinaProject(202302AB080002)supported by the Yunnan Key S&T Special Projects,ChinaProject(231100320300)supported by the Henan Key S&T Special Projects,ChinaProject(KKZ7201952006)supported by the High-level Talent Construction of Kunming University of Science and Technology,China。
