Journal
BULLETIN OF MATERIALS SCIENCE
Volume 37, Issue 2, Pages 321-325Publisher
INDIAN ACAD SCIENCES
DOI: 10.1007/s12034-014-0641-x
Keywords
Porcelain insulators; bending strength; dielectric strength; phase structure; mullite structure
Categories
Funding
- Iran Insulator Company
Ask authors/readers for more resources
In the present work, six electrical porcelain compositions with different amount of alumina and silica have been prepared and fired in an industrial furnace at 1300 degrees C. Density, porosity, bending strength and electrical strength were measured in the samples. In order to find a relationship between properties and sample microstructures, samples were analyzed by scanning electron microscope (SEM) and x-ray diffraction (XRD) techniques. The results showed that, with chemical composition of 53.5 wt.% SiO2 and 37.5 wt.% alumina, highest electrical strength of 21.97 kV/mm was achieved in fabricated electrical porcelains. Increasing amount of alumina up to 30 wt.% decreases quartz and cristobalite phases, but increases corundum phase 3 to 5 times. SEM observation revealed that dense particles and uniform distribution of long and thin needle shaped mullite are predominant in sample microstructures with highest electrical strength.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available