Study of densification by pressing and sintering of NaCl and KCl salts

Reference	Presenter	Authors (Institution)	Abstract
09-017	PEDRO AUGUSTO MACHADO VITOR	VITOR, P.A.(UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL); Alves, A.K.(Universidade Federal do Rio Grande do Sul); BERGMANN, C.P.(UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL); Santos, P.H.(UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL);	This study investigated a densification process of ceramic bodies obtained from high pressure, followed by different thermal treatments, of sodium chloride p.a. (NaCl) and potassium chloride p.a. (KCl) powders. The precursors are composed of granular particles about 0.35mm (NaCl) and 0.55mm (KCl). As bodies were formed in rectangular bars under a pressure of approximately 235MPa and fired for 1 hour at temperatures of 400, 500, 600 and 700 ° C. The samples were characterized by physical (bulk density and linear shrinkage), mechanical properties (flexural strength 4 points) and also the microstructure (SEM) was analyzed. The highest bulk density obtained was 2.13g/cm3 for NaCl samples and 1.96g/cm3 for KCl, representing a densification of 98.4%, and 98.7% respectively. These ceramic bodies also reached the maximum flexural strength of 13.7 MPa for NaCl and 8.04 MPa for KCl samples.
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