Characterization by X ray diffraction of mechanically alloyed tripotassium sodium sulfate

Abstract

Nanocrystalline powder of tripotassium sodium sulfate (K 3 Na(SO 4 ) 2 -KNS) was successfully obtained by mechanical alloying a mixture of potassium sulfate (K 2 SO 4 ) and sodium sulfate (Na 2 SO 4 ) 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.

Effect of High-Energy Ball Milling in Ternary Material System of (Mg-Sn-Na)

“…where K (0.94) is the shape coefficient; λ is the wavelength of Cu radiation; β is the FWHM value of the peak, and Φ is the XRD diffraction angle [47,48]. Dislocation density (δ) values were calculated according to Williamson-Smallman formula given in Equation ( 2) [48,49].…”