Densification and grain growth behavior of highly dense MgO ceramics in pressureless sintering. Issue 8 (September 2015)

• Record Type: Journal Article
• Authors: Li, Shengli; Song, Chunjun; Qin, Xiaoying; Zeng, Zhi
• Is Part Of: Ceramics international. Volume 41:Issue 8(2015)
• Page Start: 10148
• Page End: 10151
• Publication Date: 2015-09
• Subjects: A. Sintering -- C. Mechanical properties -- MgO -- Kinetics; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.04.115
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Highly dense MgO ceramics were fabricated by two step pressureless sintering without sintering additives, and their sintering kinetics and grain growth behavior were studied. The results indicate that a "kinetic window" in which the grain growth is suppressed exists. An activation energy Q =196.39±5.76 kJmol −1 for grain growth is estimated. In the two step sintering with optimized parameters, high dense (relative density 98.0%) samples with both a mean grain size of 21±2 um and mean hardness H v =6.1±0.2 GPa are obtained.