| dc.description.abstract | Bentonite, glass bead, and Al2O3 based fine ceramics with variation of sinter
temperatures (900, 1000, 1100, and 1200°C) have been prepared by powder metallurgy method.
The preparation process of raw materials starts from the mixing of 35 wt% powder bentonite,
35 wt% glass bead, and 30 wt% alumina using High Energy Milling (HEM). After that, the
powders are compacted with 80 kgf/cm2 into pellets. The samples are dried using oven at
100°C for 24 hours. Characterization tested includes physical properties (density, porosity,
water absorption, and hardness), microstructure by using SEM and phase analysis by using
XRD (X-Ray Diffraction). The results show that the phase formed are the major phase of albite
(Al2NaO8Si3) and quartz (SiO2), while the corundum (Al2O3) and nepheline (AlNaO4Si) are
minor phases. The result of analysis shows that bulk density and hardness value tends to
increase, while porosity and water absorption tend to decrease along with increasing sinter
temperature. The optimum condition was reached at 1100°C with bulk density = 2.43 g/cm3
,
porosity = 1.91%, water absorption = 0.8, and hardness = 878.29 HV. | en_US |
