会议专题

Effects of Iron Powder Content on the Properties of Periclase-spinel Bricks

  The periclase-spinel bricks were prepared with fused magnesia,magnesia alumina spinel,alumina powder and iron powder as raw materials,and phenolic resin as a binder.The samples with dimensions of 40mm ×40mm × 160mm were pressed,dried at 110℃ for 24h and fired in air atmosphere at 1500 ℃.The physical properties of periclase-spinel bricks prepared were measured.The results show that with the increase of iron powder in specimens,the bulk density and flexural strength of periclase-spinel bricks increased and apparent porosity decreased respectively,which is could due to metal plastic phase on the forming process of periclase-spinel bricks.After firing at 1500C,the bulk density of the specimens increased gradually and apparent porosity decreased with the increase of iron powder content,respectively.This may be due to the presence of iron liquid at the high temperature which promotes sintering.However,the cold crushing strength of the specimens after firing at 1500℃ is lowered with the increase of iron powder content possibly because of the microcracks caused by the mismatch between the thermal expansion coefficient of magnesia and spinel.The thermal shock resistance of the samples with 4wt%or more of iron powder increased,probably because the plasticity of residual iron powder of specimens could offset partial thermal stress at high temperatures,which is beneficial to the improvement of the thermal shock resistance of the samples.

periclase spinel iron powder plastic phase thermal shock resistance

ZHANG Peixiong LI Na CHEN Anbang GAO Song DING Dafei YE Guotian

Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Enginee Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Enginee

国际会议

Conference on Refractories International 2018, CRI2018)(2018国际耐火材料学术会议)

杭州

英文

1-6

2018-10-17(万方平台首次上网日期,不代表论文的发表时间)