Processing of electric ceramic insulators from slate rocks and MgO

Naga, S. M.; Sayed, M. A.; El-Omla, M.; Wassel, Ahmed R.; El-Mehalawy, N.

doi:10.1080/10426914.2020.1743853

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…Additionally, the blending of sediments with different proportions of clay and non-clay particles and/or different clay minerals is commonly used to enhance the final properties of some ceramics [5,6]. However, kaolinite and talc are both phyllosilicate minerals which present considerable interest to produce several types of ceramic materials (traditional and advances ceramics) for having certain valuable properties [7][8][9][10][11]. The addition of talc has positive effects on ceramic-for example, it increases the mechanical and optical properties of the ceramic material and glazes [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Kaolinite-Magnesite or Kaolinite–Talc-Based Ceramics. Part II: Microstructure and the Final Properties Related Sintered Tapes

et al. 2020

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In recent decades, talc and kaolinite have been widely used as raw materials for the ceramic industry. In this study, the final characteristics of kaolinitic clay mixed with 6 mass% of magnesite obtained in our previous work were compared with those obtained with mixtures of kaolin (kaolin BIP) and talc (as the source of magnesium oxide). However, different amounts of talc in the kaolin powder were studied, namely 10, 30, and 50 mass% of added talc (with respect to kaolin + talc). The tape casting process was used during this work in order to manufacture the green tapes in an aqueous system with 0.2 mass% of dispersant. Subsequently, the green tapes were heated to 1000 and 1100 °C with a dwelling time of 12 min. The green and sintering tapes were characterized using the following techniques: DTA/TG, X-ray diffraction, porosity, and flexural strength analyses. The results obtained from our previous work indicate that the specimen with 6 mass% of MgCO3 sintered at 1200 °C for 3 h exhibited the best performances, with high flexural strength and weak porosity value—117 MPa and 27%—respectively. As results from this study, the optimal mechanical and thermal properties of sintering tapes were obtained for the specimen with 10 mass% of added talc sintered at 1100 °C. Indeed, this specimen exhibited 50 MPa and 43% of stress to rupture and apparent porosity, respectively.

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