A complete critical evaluation and thermodynamic modeling of the phase diagrams and thermodynamic properties of the MgO–Al 2 O 3 –CrO–Cr 2 O 3 system at 1 bar total pressure are presented. Optimized equations for the thermodynamic properties of all phases are obtained which reproduce all ...
we designed and fabricated the Al2O3/Cr2O3 composites with 3D continuous structure by using Al2O3 as the ceramic matrix and Cr2O3 with high thermal oxidation resistance as the second phase to reduce the friction at high temperature [3]. The effects of compositions and structures on the ...
Phase equilibria in the four-component system CaO-Al2O3-B2O3-H2O at 23 +/- 1 degrees C have been investigated Data obtained experimentally were used to construct a phase diagram showing the stability regions of the solid phases Ca(OH)(2), AI(OH)(3), the ternary hydrate 3CaO . Al2O...
用某些其它金属氧化物(如V2O5、Cr2O3、MnO2等)代替传统铝热剂反应中的氧化铁,也可以发生铝热剂反应。当铝粉跟这些金属氧化物反应时,产生足够高的热量,使被还原的金属在较高温度下呈熔融状态,与形成的熔渣分离开来,从而获得较纯的金属。在工业上常用这种方法冶炼难熔及昂贵的金属,如钒、铬、锰、钛、钨等,反应后...
The experimental composition of the present study are depicted in the AlO1.5-CaO-CrOx phase diagram (Fig. 1b), while the Conclusion In the pursuit of a Cr(VI) dominant region in the Al2O3–CaO–Cr2O3 system, we found that higher Cr2O3 content not necessarily produces more Cr(VI)....
低温合成MgO-Al2O3-FeOn复相材料 http://www.gxyb.cbpt.cnki.net DOI：10.14062/j.issn.0454-5648.2015.06.07 低温合成MgO-Al2O3-FeO n复相材料 张浩波1，李勇1，孙加林1，曹硕1，孙永强1，李燕京1,2，高长贺3，张积礼3 (1. 北京科技大学材料科学与工程学院，北京100083；2. 北京通达耐火工程技术有限...
Al2O3体系的相图 Fig 1 3 MgO Al2O3 phase diagram 1 3 1 镁铝尖晶石制备方法镁铝尖晶石制备方法 镁铝尖晶石在自然界中是一种接触变质产物 也有少数来自火成岩和沉积岩 但天然产出很少 耐火材料用镁铝尖晶石都是由MgO 和Al2O3人工合成的 用含MgO 和Al2O3的原料合成镁铝尖晶石的生产方法有两类 电熔法...
nucleation [18e20].However, the effect of Cr2O3 on LAS glass-ceramic has not been reported until now.Accordingly,the motive of this paper is to explore the in,uence and mechanism of Cr2O3 addition on the crystallization and properties of LAS system,and further improve the mechanical ...
Effect of Al2O3/SiO2 mass ratio on viscosity of CaO–Al2O3–SiO2–CaF2 slag. Ironmak. Steelmak. 2015, 42, 154–160. [CrossRef] 22. Behera, R.; Mohanty, U. Viscosity of Molten Al2O3–Cr2O3–CaO–CaF2 Slags at Various Al2O3/CaO Ratios. ISIJ Int. 2001, 41, 834–843. [...
Microstructural investigation of high temperature oxidation of Al2O3-forming and Cr2O3-forming steels - The influence of water vapour Applied Physics, Microscopy and Microanalysis, Chalmers University of Technology, Gothenburg (2008) Google Scholar [39] L. Kovarik, M. Bowden, J. Szanyi High temp...