Abstract
Wollastonite (CaSiO 3) ceramics were prepared by a new sintering technology: spark plasma sintering (SPS), using CaSiO 3 ultra-fine powders as precursor. The ceramics were sintered at different temperature and different heating rate. The properties of sintered ceramics were discussed detail. All samples have a high relative density, which are close to the theoretical density. The ceramic sample sintered at 1150 °C for 5 min with a heating rate of 100 °C/min had the compact microstructure, its relative density is 97.3%, meanwhile had a fine grain size of about 37.6 nm.
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