Sinterability of powders of parent glassceramic belonging to the lzsa system treated by ion exchange

Quimica nova

Ronsani, Patrícia¹  Oliveira, Antonio Pedro Novaes de¹  Montedo, Oscar Rubem Klegues² 

[1] Universidade Federal de Santa Catarina, Florianópolis, Brasil;Universidade do Extremo Sul Catarinense, Criciúma, Brasil

关键词: glassceramics;    ion exchange;    sintering.;   

DOI  :  10.1590/S0100-40422012000400006

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Ion exchange method was employed by means of surface modification of the glass powders of LZSA (Li2O-ZrO2-SiO2-Al2O3) system submitted to a 70wt% NaNO3/30wt% NaSO4 bath salt followed by a heat treatment. Chemical analysis by X-ray fluorescence was used to evaluate the efficiency of ion exchange, while optical dilatometry was employed to evaluate sintering of compacts. Evaluation of the structure of sintered bodies was made by scanning electron microscopy. Substitution of Li+ ions by Na+ ions on the surface of powders during heat treatments of 450 and 600 ºC for 2-10 h promoted an increase in densification of the sintered bodies.

【 授权许可】

CC BY