Materials Research | |
Characterization by X ray diffraction of mechanically alloyed tripotassium sodium sulfate | |
Marcus Aurélio Ribeiro Miranda1  José Marcos Sasaki1  Antônio Sérgio Bezerra Sombra1  Cléber Costa Silva1  Cláudio Márcio Rocha Remédios1  | |
[1] ,Universidade Federal do Ceará Departamento de Física Fortaleza CE ,Brazil | |
关键词: sulfate; mechanical alloying; X ray; powder diffraction; | |
DOI : 10.1590/S1516-14392006000200023 | |
来源: SciELO | |
【 摘 要 】
Nanocrystalline powder of tripotassium sodium sulfate (K3Na(SO4)2 - KNS) was successfully obtained by mechanical alloying a mixture of potassium sulfate (K2SO4) and sodium sulfate (Na2SO4) with a proportion of 3:1 in a planetary mill. X ray powder diffraction (XRPD) was used to characterize this material. Powders produced with high milling times: 15, 30, 45 and 60 hours, have shown a single phase. For 60 hours of milling time, the powder was formed with very small grains (60 nm in average). We also prepared several samples with low milling times: 30, 60, 120, 150 and 180 minutes. The results for this series show that 120 minutes of milling is enough to produce a single crystalline phase of KNS. Therefore, we showed that a nanocrystalline powder of tripotassium sodium sulfate is easily obtained by mechanical alloying and that the grain size can be controlled by the amount of milling time.
【 授权许可】
CC BY
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