TY - GEN
T1 - XRD line-broadening characteristics of M-oxides (M=Mg, Mg-Al, Y, Fe) nanoparticles produced by coprecipitation method
AU - Pratapa, S.
AU - Susanti, L.
AU - Insany, Y. A.S.
AU - Alfiati, Z.
AU - Hartono, B.
AU - Mashuri,
AU - Taufiq, Ahmad
AU - Fuad, Abdullah
AU - Triwikantoro,
AU - Baqiya, M. A.
AU - Purwaningsih, S.
AU - Yahya, E.
AU - Darminto,
PY - 2010
Y1 - 2010
N2 - Simple coprecipitation method has been used to produce nanoparticles of MgO (magnesia), MgOAl2O3 (spinel), Y2O3 (yttria) and Fe3O4 (ferrite). The raw materials were, in respective, magnesium powder, magnesium and aluminium powders, ytrria powder, and natural sand. The coprecipitation included the use of suitable acid and base to dissolve the powders or sand and to produce precipitates, as well as the use of water to wash and purify the precipitates, and drying at relatively low temperatures, namely lower than 100°C, followed by heating at 450°C, 750°C, 600°C and 200°C to produce magnesia, spinel, yttria and ferrite nanopowders, respectively. X-ray diffractometry was used to characterise the purity and nanocrystallinity of the final powders. It was found qualitatively that the powders were of high purity. Further line-broadening analysis using single-line and Rietveld-based softwares was performed to reveal the nanocrystallinity of the powders. Different line breadth values were found for the powders, indicating different crystallite sizes. It was also found that, particularly for spinel and yttria, the diffraction peaks exhibited 'longer' tails, indicating broader crystallite size distribution. The average crystallite size for the powders ranged from 3 to 70 nm. The results could then be used as 'fingerprints' for nanocrystallinity using x-ray diffractometry. The XRD crystallite sizes for yttria and ferrite nanocrystals are in fair agreement with their counterparts from electron microscopy observation.
AB - Simple coprecipitation method has been used to produce nanoparticles of MgO (magnesia), MgOAl2O3 (spinel), Y2O3 (yttria) and Fe3O4 (ferrite). The raw materials were, in respective, magnesium powder, magnesium and aluminium powders, ytrria powder, and natural sand. The coprecipitation included the use of suitable acid and base to dissolve the powders or sand and to produce precipitates, as well as the use of water to wash and purify the precipitates, and drying at relatively low temperatures, namely lower than 100°C, followed by heating at 450°C, 750°C, 600°C and 200°C to produce magnesia, spinel, yttria and ferrite nanopowders, respectively. X-ray diffractometry was used to characterise the purity and nanocrystallinity of the final powders. It was found qualitatively that the powders were of high purity. Further line-broadening analysis using single-line and Rietveld-based softwares was performed to reveal the nanocrystallinity of the powders. Different line breadth values were found for the powders, indicating different crystallite sizes. It was also found that, particularly for spinel and yttria, the diffraction peaks exhibited 'longer' tails, indicating broader crystallite size distribution. The average crystallite size for the powders ranged from 3 to 70 nm. The results could then be used as 'fingerprints' for nanocrystallinity using x-ray diffractometry. The XRD crystallite sizes for yttria and ferrite nanocrystals are in fair agreement with their counterparts from electron microscopy observation.
KW - X-ray diffraction line broadening
KW - coprecipitation method
KW - metal-oxides
KW - nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=79951902656&partnerID=8YFLogxK
U2 - 10.1063/1.3515533
DO - 10.1063/1.3515533
M3 - Conference contribution
AN - SCOPUS:79951902656
SN - 9780735408388
T3 - AIP Conference Proceedings
SP - 125
EP - 128
BT - Third Nanoscience and Nanotechnology Symposium 2010, NNSB2010
T2 - 3rd Nanoscience and Nanotechnology Symposium 2010, NNSB2010
Y2 - 16 June 2010 through 16 June 2010
ER -