Journal of Physical Chemistry and Functional Materials

Yazarlar: Mücahit UĞUR

Konular:Mühendislik, Kimya

Anahtar Kelimeler:Crystallization,Df value

Özet: Generally, commercial product of calcium sulfate anhydrous (CaSO4) is synthesized burning gypsum in kiln, in the process that the water is removed from gypsum crystallized by mixing CaCl2 and Na2SO4 in aqueous medium. It is possible to change gypsum properties by changing the parameters during crystallization. Also, the differentiation in the structures of the synthesized product can be possible with using additives during the crystallization. The changes in properties of these synthetically produced materials may be investigated instrumentally. This study examines change of surface fractal dimensions (Df) of synthesized CaSO4 anhydrate instrumentally. CaSO4.2H2O was synthesized by chemical precipitation method in the presence Poly(Sodium 4-Styrene Sulphonate) and measured N2-physisorption measurements after burning. Fractal dimensions were determined using single N2-adsorption/desorption isotherms method. For Fractal dimension calculations, the Frenkel–Halsey–Hill (FHH) and the Neimark–Kiselev (NK) methods were used. Taguchi method has been used in evaluation of experimental design for optimization of Df values.

---