%A 1117041030 NUR FAIZAH 
%T PENGARUH PENAMBAHAN ALUMINA (Al2O3) (0, 10, DAN 15 wt%)
TERHADAP KARAKTERISTIK KEKERASAN DAN STRUKTUR
CORDIERITE (2 MgO.2 Al2O3.5 SiO2) BERBASIS SILIKA SEKAM PADI
%X Penelitian ini dilakukan untuk mengetahui pengaruh penambahan alumina
terhadap karakteristik kekerasan, dan struktur cordierite. Silika diperoleh dari
sekam padi melalui metode sol-gel sedangkan alumina dan magnesium oksida
berasal dari Sigma-Aldrich. Cordierite disintesis melalui metode padatan dengan
suhu sintering 1200oC. Hasil Pengukuran menunjukan bahwa penambahan
alumina dapat meningkatkan nilai kekerasan, mengurangi densitas, dan
meningkatkan porositas. Karakterisasi dengan X-Ray Diffraction (XRD)
menunjukkan adanya struktur yang diperoleh, yaitu kristobalit, corundum,
cordierite, spinel, dan periclase. Seiring meningkatnya komposisi alumina pada
sampel, maka semakin meningkat pula nilai fraksi massa struktur corundum di
dalam sampel.
Kata kunci: Alumina, cordierite, kekerasan, sekam padi, struktur, dan X-Ray
Diffraction.

abstract

This study was carried out to investigate the effect of alumina on hardness
characteristics, and structure of cordierite. Silica obtained from rice husk through
sol-gel method, while alumina and magnesium were obtained from Sigma-
Aldrich. Cordierite was synthesized by the solid state method and sintered at
1200?C. The measurement results revealed that the addition of alumina on
cordierite can increased both hardness and porosity, and decrease density. X-Ray
Diffraction (XRD) showed the existence of vased structures such as cristobalite,
corundum, cordierite, spinel, and periclase. Along the increase of alumina content,
hence increases also the mass fraction of corundum structure on sample.
Keywords: Alumina, cordierite, hardness, rice husk, and X-Ray Diffraction.
%C  UNIVERSITAS LAMPUNG
%D 2016
%I FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM
%L eprints23036