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Określenie wywołanych mechanicznie przemian fizykochemicznych wybranych soli nieorganicznych

Wieczorek-Ciurowa K., Paryło M., Szirokow J. G.

Czasopismo Techniczne. Chemia

2000

R. 97, z. 3-Ch

77--88

The estimation of physical changes in malachite, calcite and their physical mixture caused by dry grinding were studied. Universal in this case thermogravimetry and X-ray powder diffraction as a supplementary method allowd to determinate the composition of solid products after mechanical treatment. The degree of malachite decomposition of solid products after mechanical treatment. The degree of malachite decomposition into CuO ground with calcite is appreciable higher that of malachite ground alone. The calcite, which remains undecomposed, appears to play the part of an abrasive. Partial polymorphic transformation to aragonite takes place. In all materials, the degree of crystallinity decreases.

Zastosowanie termograwimetrii do oceny efektów mechanicznej aktywacji soli nieorganicznych na przykładzie Cu2OH2CO3

Wieczorek-Ciurowa K., Paryło M., Szirokow J. G.

Czasopismo Techniczne. Chemia

1999

R. 96, z. 3-Ch

67--76

The use of thermogravimetry to assess the effect of mechanical activation by dry grinding of malachite was presented. The mass loss of water and carbon dioxide separately and/or together for Cu2OH2CO3 samples untreated and ground for different time was quantified. On that basis the amount of malachite decomposing during heating in thermobalance was calculated. From the measured total amount of CuO, the original mass of malachite present before mechanical treatment could be determinated. For the identification of solids, X-ray diffraction and IR spectroscopy were helpful, but only thermoanalytical techniques are universal in this case