Pengaruh Suhu Tinggi terhadap Karakteristik Keramik Cordierite Berbasis Silika Sekam Padi
Abstrak: This study was
carried out to investigate the effect of high temperature on the functional
groups, microstructure and physical characteristics of cordierite ceramics
obtained from an aqueous solution of magnesium nitrate hydrate ((Mg(NO3)2
.6.12H2O)), aluminium nitrate hydrate (Al(NO3)2.9.15H2O) and silica sols
extracted from rice husk. The samples were sintered at temperature of 10000C,
12000C and 14000C. Functional groups and microstructural characteristics of
cordierite ceramics were examined by FTIR and SEM, respectivelly. FTIR study
shows that the absence of the vibration bands of Na-OH, Si-OH, C-O, Si-O-Si on
the samples. However, the formation of cordierite structure was dominated on
this high temperature. Microstructure results confirmed the presence of
irregular morphology of the solid and compact phases. In addition, the
densities, shrinkage and hardness of cordierite increase significantly with
increasing temperature, but porosity decreases with increasing temperature.
Penulis: Simon Sembiring,
Posman Manurung, dan Pulung Karo-Karo
Kode Jurnal: jpfisikadd090049
