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    STUDIA PHYSICA - Issue no. SPECIAL%20ISSUE / 2001  
         
  Article:   SPECTROSCOPICAL CHARACTERISATION OF PRECURSORS FOR CALCIUM HYDROXIDE SYNTHESIS.

Authors:  CRINA DAN, ELISABETH-JEANNE POPOVICI, LAURA UNGUR, LIGIA PASCU, CRISTINA CIOCAN, R. GRECU. 		 
       
         
  Abstract:  The present work refers to the preparation and characterisation of calcium carbonate and calcium oxide precursors for the manufacture of high quality calcium hydroxide for dentistry use. Calcium carbonate precursors were prepared from high purity calcium chloride and ammonium carbonate as precipitating agents, by using the simultaneous reagent addition technique. The as-obtained precipitates were maturated, washed and dried and finally converted into CaO-precursors. Chemical and thermal analysis, FTIR and UV-Vis spectroscopy were used to characterise both CaCO3 and CaO precursors. The influence of some synthesis conditions on CaCO3 and CaO precursor quality was illustrated.  
         
     
         
         
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