Carbon Nanofiller-enhanced Ceramic Composites: Thermal and Electrical Studies

Sivabalan Sasthiryar, H. P. S. Abdul Khalil, Z. A. Ahmad, Md Nazrul Islam, Rudi Dungani, H. Mohammad Fizree

Abstract


The present research is focused on the manufacturing and analysis of the thermal and electrical properties of advanced ceramics from alumina (Al2O3) with carbon nanofiller (CNF) from oil palm ash (OPA). The oil palm ash was used to produce carbon black nanofillers with a size of 50 to 100 nm via a ball milling process after undergoing pyrolysis in a furnace at 1000 °C. CNFs were added to the alumina at varying weight fractions and sintered at 1400 °C for the production of CNF ceramic composites. The coefficient of thermal expansion (CTE), electrical conductivity (EC), and electrostatic discharge (ESD) of the ceramic composites were measured. The CTE did not increase with increasing CNF weight and behaved like an alumina matrix. The EC (I-V) showed positive results with increasing CNF weight. The ESD measurement gave predictable results on the dissipative characteristics of ceramic composites due to the insulating nature of alumina with the addition of CNF. Thus, the addition of OPA to alumina may present a suitable route for improving the electrical properties of advanced ceramics.

Keywords


Alumina; Oil palm ash (OPA); Thermal coefficient (CTE); Electrostatic discharge (ESD); Voltage –current (IV)

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