Thermodynamic Assessment and Process Optimization of Self-diffusion High-temperature Nitriding Synthesis of Mg-α/β-SiAlON
High efficient and comprehensive utilization of magnesium-containing resources, developing high value-added products is an important development direction that use of magnesium-containing resources in Chinas.Basic on the existing researches, the improvement of the production processes of Mg-a/β-SiAlON determines conditions of process which will be fit for making Mg-a/β-SiAlON powder by lower grade magnesite.In this paper, metal aluminum, metal fume, a-Al2O3 powder and medium magnesite powder are the main raw materials,supplemented by a small amount of additives (Y2O3,Dy2O3 and Er2O3), Mg-α/β-SiAlON was prepared by high temperature nitriding.The amount of Mg-α/β-SiAlON of each sample by XRD analysis, and influence of different sintering aids (Y2O3, Dy2O3 and Er2O3), on Mg-a/β-SiAlON synthetic was explored.The results showed that: 1.Medium magnesite, Si powder, Al powder anda-Al2O3 are the main raw materials, and a single-phase rare earth oxides Y2O3,Dy2O3, Er2O3 as additive, can be used to Mg-a/β-SiAlON.The promoting sintering role of Y2O3 is superior to Dy2O3 and Er2O3 under the experimental conditions.2.The single sintering aid Y2O3 is better than the composite sintering aids A (Y2O3+Dy2O3+Er2O3) > B(Y2O3+Er2O3) under the experimental conditions.
Mg-α/β-SiAlON temperature nitrogen additive cell parameters
WANG Yanhui CHEN Shujiang SUN Lijie LIU Xin
College of High Temperature Materials and Magnesium Resource Engineering,Liaoning University of Scie Iron and Steel Industrial Group Co.,Ltd.,the original fuel production service branch,Zibo 255200,Chi
国际会议
西安
英文
1-4
2016-09-20（万方平台首次上网日期，不代表论文的发表时间）