Keywords : Kaolin
Effect of Micro and Nano Zirconia (ZrO2) Addition on the Thermal Conductivity of Iraqi Kaolin Composite
journal of kerbala university,
2018, Volume 14, Issue 1, Pages 79-94
Iraqi kaolin is used as a principle part of the study after additives sugarcane straw in ratio (10%) and (2%) from Poly Vinyl Alcohol ( PVA) as a binding material. (Micro or Nano) Zirconia added to the composite in different ratio ( 0% , 5 % , 10% , 15% , 20% ) for the purpose of improving the thermal properties. Samples are reformed in a semi-dry pressing with pressure about (25 MPa).
The formulation is achieved by using a template of (40 mm) diameter and a period about (2 min). Then sintering for the prepared samples where done.
Burning process by three temperature degrees ( 1000, 1100, 1200 ) Co at average raise about 3 temperature degree / 1 minute and remained at every temperature degree for two hours.
The results showed that the increase in the proportion of ( Micro or Nano ) Zirconia lead in a reduction the value of thermal conductivity and received the best results by adding Nano Zirconia, while it lead increasing the temperature degree of the burning to increasing the value of the thermal conductivity.