Promoting the flash sintering of ZnO in reduced atmospheres to achieve nearly full densities at furnace temperatures of <120 °C. (September 2015)

• Record Type: Journal Article
• Authors: Zhang, Yuanyao; Luo, Jian
• Is Part Of: Scripta materialia. Volume 106(2015)
• Page Start: 26
• Page End: 29
• Publication Date: 2015-09
• Subjects: Electric field/current assisted sintering -- Flash sintering -- Zinc oxide -- Sintering atmosphere; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.04.027
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract : Using ZnO as a model system, a strong dependence of the onset flash sintering temperature on the atmosphere has been discovered. In the best cases, ZnO specimens have been sintered to >97% relative densities (with fine grain sizes of ∼1 μm) in ∼30 s at furnace temperatures of <120 °C in Ar + 5 mol.% H2 . The enhanced conductivities of ZnO powder specimens in reduced atmospheres are responsible for the substantial decreases of the onset flash sintering temperatures.