In situ foam-gelcasting fabrication and properties of highly porous γ-Y2Si2O7 ceramic with multiple pore structures. (1st July 2015)

• Record Type: Journal Article
• Authors: Wu, Zhen; Sun, Luchao; Wan, Peng; Li, Junning; Hu, Zijun; Wang, Jingyang
• Is Part Of: Scripta materialia. Volume 103(2015)
• Page Start: 6
• Page End: 9
• Publication Date: 2015-07-01
• Subjects: Porous γ-Y2Si2O7 ceramic -- Microstructure -- Mechanical property -- Thermal conductivity; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.02.024
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : Highly porous γ-Y2 Si2 O7 is fabricated by the in situ foam-gelcasting reaction sintering method using Y2 O3 and SiO2 starting powders. The prepared porous γ-Y2 Si2 O7 has multiple pore structures, including interconnected large pores and small pores in the skeleton. The sample sintered at 1550 °C has low linear shrinkage (6.0%), high porosity (84.9%), high compressive strength (6.22 MPa), and low thermal conductivity (0.230 W/(m K)). This work sheds light on porous γ-Y2 Si2 O7 as a promising high-temperature thermal insulator.