Wzór Scherrera : stulecie błędnych praktyk

• Autorzy: Tomaszewski P. E.

Warianty tytułu

EN

Scherrer formula : the century of erroneous practices

• Języki publikacji: PL

Abstrakty

EN

We present the sources of uncertainty in the evaluation of grain size in nanomaterial. The calculations are made for the same diffraction pattern using Scherrer and Williamson-Hall methods. As an example we use the CoCr₂O₄ nanocrystal. The comparison of results from different calculations, methods and programs is made just to show how important is the (correct) choice of a method and its internal parameters. The data from well known Scherrer formula, show that the difference in obtained results exceeds 100% up to even about 350%. This indicates that in any case the Scherrer formula could not give the correct and reliable value for crystallite size. As a consequence, the wide use of this formula is a great error providing the incorrect results.

Słowa kluczowe

PL

Wzór Scherrera; nanomateriały; badania dyfrakcyjne; rozmiar krystalitów

EN

Scherrer's formula; nanomaterials; diffraction studies; grain size

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Wiadomości Chemiczne
• Rocznik: 2013
• Tom: [Z] 67, 9-10
• Strony: 929--942
• Opis fizyczny: Bibliogr. 9 poz., wykr.

Twórcy

autor

Tomaszewski P. E.

• Instytut Niskich Temperatur i Badań Strukturalnych Polska Akademia Nauk P. Nr 1410, 50-950 Wrocław 2

Bibliografia

• [1] P. Scherrer, Nachr. Ges. Wiss. Gottingen, 1918, 26, 98.
• [2] H. Natter, M.Schmelzer, M.-S. Loffler, C.E. Krill, A. Fitch, R. Hempelmann, J. Phys. Chem. B, 2000, 104, 2467.
• [3] R.J. Matyi, L.H. Schwartz, J.B. Butt, Catal. Rev. - Sci. Eng., 1987, 29, 41.
• [4] G.K. Williamson, W.H. Hall, Acta Metall., 1953, 1, 22.
• [5] J.D. Martin, XPowder12, ver. 02.12 (2012).
• [6] T. Roisnel, J. Rodriguez-Carvajal – WinPLOTR, ver. Sept. 2012.
• [7] M. Bortolotti, L. Lutterotti, I. Lombardelli, J. Appl. Cryst., 2009, 42, 538.
• [8] D. Balzar, N. Audebrand, M.R. Daymond, A. Fitch, A. Hewat, J.I. Langford, A. Le Bail, D. Louer, O. Masson, C.N. McCowan, N.C. Popa, P.W. Stephens, B.H. Toby, J. App. Crys., 2004, 37, 911.
• [9] J.-D. Lin, J.-G. Duh, J. Mater. Sci., 1997, 32, 5779.