A new approach to fabricate MgO-C refractories with high thermal shock resistance by adding artificial graphite. Issue 4 (April 2018)

• Record Type: Journal Article
• Authors: Zhu, Tianbin; Li, Yawei; Sang, Shaobai; Xie, Zhipeng
• Is Part Of: Journal of the European Ceramic Society. Volume 38:Issue 4(2018)
• Page Start: 2179
• Page End: 2185
• Publication Date: 2018-04
• Subjects: Thermal shock resistance -- Microstructure -- Artificial graphite -- MgO-C refractories; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.10.018
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: To lower the carbon content but to exhibit a better thermal shock resistance with MgO-C refractories containing 14 wt% flaky graphite, a new approach, based on the addition of artificial graphite, is reported for enhancing the thermal shock resistance of such refractories with 10 wt% graphite in the present work. The addition of artificial graphite (not more than 2 wt%) has a slight influence on the flexural strength of the specimens, but apparently enhances their thermal shock resistance. In particular, the specimen containing 2 wt% artificial graphite has a higher flexural strength after thermal shocks and a relatively closer residual strength ratio as compared to the reference specimen with 14 wt% flaky graphite, as it is related with the formation of more AlN reinforced phases, decreased coefficient of thermal expansion as well as increased work of fracture.