# Phase Composition, Crystallite Size and Physical Properties of B2O3-added Forsterite Nano-ceramics
> Pratapa S.

URL kanonis: https://discover.unhas.ac.id/publications/pub_scopus_85050697355
Jurnal / Konferensi: Iop Conference Series Materials Science and Engineering
Tahun terbit: 2018
DOI: https://doi.org/10.1088/1757-899X/350/1/012002
ISSN: 17578981
Citations: 2

## Authors
- Pratapa S.

## Abstract
This study was aimed to know the effect of B2O3 addition on the phase composition, crystallite size and dielectric properties of forsterite (Mg2SiO4) nano-ceramics. It utilized a purified silica sand from Tanah Laut, South Kalimantan as the source of (amorphous) silica and a magnesium oxide (MgO) powder. They were thoroughly mixed and milled prior to calcination. The addition of 1, 2, 3, and 4 wt% B2O3 to the calcined powder was done before uniaxial pressing and then sintering at 950 °C for 4 h. The phase composition and forsterite crystallite size, the microstructure and the dielectric constant of the sintered samples were characterized using X-ray diffractometer (XRD), Scanning Electron Microscope (SEM) and Vector Network Analyzer (VNA), respectively. Results showed that all samples contained forsterite, periclase (MgO) and proto enstatite (MgSiO3) with different weight fractions and forsterite crystallite size. In general, the weight fraction and crystallite size of forsterite increased with increasing B2O3 addition. The weight fraction and crystallite size of forsterite in the 4%-added sample reached 99% wt and 164 nm. Furthermore, the SEM images showed that the average grain size became slightly larger and the ceramics also became slightly denser as more B2O3 was added. The results are in accordance with density measurements using the Archimedes method which showed that the 4% ceramic exhibited 1.845 g/cm3 apparent density, while the 1% ceramic 1.681 g/cm3. We also found that the higher the density, the higher the average dielectric constant, i.e. it was 4.6 for the 1%-added sample and 6.4 for the 4%-added sample.

## Keywords
- Forsterite
- Crystallite
- Materials science
- Microstructure
- Mineralogy
- Scanning electron microscope
- Grain size
- Ceramic
- Calcination
- Dielectric
- Sintering
- Analytical Chemistry (journal)
- Composite material
- Metallurgy
- Chemistry
- Chromatography
- Optoelectronics
- Catalysis
- Biochemistry

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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