Effect of Air Blast Furnace Slag and γ-Alumina Content on Dielectric Properties and Physical Properties of Porcelain Insulators

Doaa A. Abdel Aziz^1, , Mobarak H. Aly², Ibrahim A. Salem³ and Salah A. Abead⁴

¹Ceramic Department, National Research Center, Dokki, Cairo, Egypt

²Environmental Studies and Researches Institute, University of Sadat City

³Geology Department, Faculty of Science, Tanta University

⁴Geologist, Faculty of Science, Tanta University

Cite this paper:
Doaa A. Abdel Aziz, Mobarak H. Aly, Ibrahim A. Salem and Salah A. Abead. Effect of Air Blast Furnace Slag and γ-Alumina Content on Dielectric Properties and Physical Properties of Porcelain Insulators. Physics and Materials Chemistry. 2015; 3(2):30-36. doi: 10.12691/pmc-3-2-3

Abstract

In this study, the effect of air blast furnace slag (ABFS) and γ-Alumina additions on densification, crystalline phases, microstructure, mechanical and electrical properties were investigated. ABFS was added partially in replacement of γ-Alumina and/or feldspar for preparing electro-porcelain compositions. The presence of slag from 15 up to 30 mass % to the standard mix (γAS0) which fired at 1300C for 1h led to relatively low bulk density (BD) ranging between (2.21 and 2.32 g/cm³) as compared with standard mix (γAS0) (BD 2.51 g/cm³), this may be due to presence of much high fluxing oxides in the fired bodies. The main phases recorded were anorthite, corundum, cristobalite with traces mullite The relevant of electroceramic bodies produced exhibited high values for volume resistivity (VR) (25x10¹¹ to 30x10¹¹Ω/cm) and relatively low values in the dielectric strength (DS) (11 to 12.43 kv/mm ) as compared with standard mix (γAS0), (VR) (12x10¹¹Ω/cm) and (DS) (15.76 kv/mm), respectively. The present results show that it is possible application of recycled slag after grinding and elimination any iron contamination for the production of low voltage electrical insulators electro-ceramic bodies.

Keywords:
slag γ-Alumina densification crystalline phases microstructure mechanical and electrical properties

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