Direct synthesis of nano-sized glass powders with spherical shape by RF (radio frequency) thermal plasma |
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Authors: | J.H. SeoJ.S. Kim M.Y. LeeW.T. Ju I.T. Nam |
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Affiliation: | a High Enthalpy Plasma Research Center, Chonbuk National University, Jeonbuk, 561-756, Republic of Koreab Plasnix. Co. Ltd, Inchon, 405-100, Republic of Koreac Department of Advanced Materials Science and Engineering, Kangwon National University, 200-701, Republic of Korea |
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Abstract: | A new route for obtaining very small, spheroid glass powders is demonstrated using an RF (radio frequency) thermal plasma system. During the process, four kinds of chemicals, here SiO2, B2O3, BaCO3, and K2CO3, were mixed at pre-set weight ratios, spray-dried, calcined at 250 °C for 3 h, and crushed into fragments. Then, they were successfully reformed into nano-sized amorphous powders (< 200 nm) with spherical shape by injecting them along the centerline of an RF thermal plasma reactor at ~ 24 kW. The as-synthesized powders show negligible (< 1%) composition changes when compared with the injected precursors of raw material compounds. |
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Keywords: | Glass Powder Spherical Nano RF thermal plasma Calcination |
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