@misc{eprints24459,
           month = {Oktober},
           title = {MIKROSTRUKTUR DAN KONDUKTIVITAS LISTRIK CORDIERITE BERBASIS SILIKA SEKAM PADI DENGAN PENAMBAHAN MAGNESIUM OKSIDA (0, 20, 25, DAN 30\%)},
          author = {(1217041033) Mirawati},
         address = {UNIVERSITAS LAMPUNG},
       publisher = {FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM},
            year = {2016},
             url = {http://digilib.unila.ac.id/24459/},
        abstract = {ABSTRAK Telah dilakukan sintesis dan karakterisasi cordierite berbasis silika sekam padi dengan penambahan magnesium oksida (MgO) sebanyak 0, 20, 25, dan 30\%. Pembuatan cordierite menggunakan silika sekam padi, MgO, dan Al2O3. Silika diekstraksi dengan metode alkalis menggunakan larutan NaOH 1,5\% dan HNO3 10\%. Cordierite disintesis melalui metode padatan dengan suhu sintering 1250?. Hasil analisis Scanning Electron Microscopy (SEM) menunjukkan adanya bentuk yang tidak beraturan dan penggumpalan pada sampel. Hasil analisis Energy Dispersive Spectroscopy (EDS) mengkonfirmasi adanya unsur-unsur penyusun cordierite dan pengotor. Nilai konduktivitas listrik semakin menurun seiring dengan penambahan persentase MgO. Pada penelitian ini diperoleh nilai konduktivitas listrik antara 3,15x10-7-1,27x10-8 S/cm dan termasuk bahan isolator. Uji fisis menunjukan bahwa penambahan MgO mengurangi densitas dan menambah porositas sampel.
 
Kata Kunci: Cordierite, konduktivitas listrik, MgO, SEM, silika sekam padi.


ABSTRACT

Synthesis and characterization of cordierite-based rice husk silica has been conducted by magnesium oxide (MgO) 0, 20, 25, and 30\%. Preparation of cordierite used silica rice husk, MgO, and Al2O3. Silica were extracted by alkalis method using 1,5\% NaOH solution and 10\% HNO3. Cordierite was synthesized by the solid state method and sintered at 1250?. The result of analaysed Scanning Electron Microscopy (SEM) showed that irregular morphology and agglomeration of sample. The result of analaysed Energy Dispersive Spectroscopy (EDS) confirmed that presence of cordierite constituents and several impurities. The electrical conductivity value decreases due to the addition of MgO percentage. In this research the electrical conductivity values were obtained between 3,15x10-7?1,27x10-8 S/cm, and it is included as insulator. Physical testing results showed that the addition of MgO reduced density and increased porosity of sample.

Key words: Cordierite, electrical conductivity,  MgO, SEM, rice husk silica.


}
}