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

Química Nova

Universidade do Extremo Sul Catarinense, Criciúma, Brasil¹  Montedo, Oscar Rubem Klegues¹  Universidade Federal de Santa Catarina, Florianópolis, Brasil¹  Oliveira, Antonio Pedro Novaes de¹  Ronsani, Patrícia¹ 

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】

Unknown