کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10264395 | 457814 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and thermal properties of boron nanoparticles synthesized from B2O3 + 3Mg + kNaCl mixture
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structural and thermal properties of boron nanoparticles synthesized from B2O3 + 3Mg + kNaCl mixture Structural and thermal properties of boron nanoparticles synthesized from B2O3 + 3Mg + kNaCl mixture](/preview/png/10264395.png)
چکیده انگلیسی
Amorphous boron nanoparticles were synthesized by heating a B2O3 + 3 Mg + kNaCl (k is the number of moles of NaCl) exothermic mixture in a laboratory oven at 800 °C under argon flow. NaCl was used as inert material to decrease the maximum combustion temperature of the reaction mixture when it was self-ignited after the melting of Mg at 650 °C. The size of the boron nanoparticles extracted from the final product by acid leaching ranged between 30 and 300 nm for k values ranging from 1 to 5. Moreover, increasing the value of k from 1 to 5 resulted in an increase in the specific surface area of the nanoparticles from 40 to 74 m2 gâ1. However, at k = 10, a decrease in the specific surface area to 47.56 m2 gâ1 was recorded due to incomplete reduction of B2O3. The ignition point of boron nanoparticles in air as estimated using a thermocouple was approximately 300 °C. Digital camera recording of the combustion process of boron nanoparticles in air revealed that the burning speed of the nanoparticles increased significantly from 0.3 to 15 cm/s when k increased from 1 to 5.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 161, Issue 12, December 2014, Pages 3222-3228
Journal: Combustion and Flame - Volume 161, Issue 12, December 2014, Pages 3222-3228
نویسندگان
Bung Uk Yoo, Hayk H. Nersisyan, Hong Youl Ryu, Jin Seok Lee, Jong Hyeon Lee,