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Initial Sintering Stage Kinetics of CeO sub 2 Studied by Stepwise Isothermal Dilatometry

机译：CeO sub 2的初始烧结阶段动力学研究逐步等温膨胀法

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The kinetics of the initial sintering stage of CeO sub 2 is studied by a new dilatometric technique in which the heating of the sample is controlled by its shrinkage rate. By this technique the shrinkage characteristically takes place in 'isothermal steps' which allows both the mechanism and its activation energy to be determined in a single experiment. The basic equations necessary to evaluate the shrinkage data are described, and using these equations on the curves recorded for CeO sub 2 it it shown that the controlling mechanism for the initial sintering stage for this oxide is grain-boundary diffusion of Ce exp 4+ -ions with an activation energy of 119.4 kcal/mole (5.2 eV). The corresponding diffusion coefficient is estimated to vary between 8.5 x 10 exp -17 - 3.1 x 10 exp -15 cm exp 2 /sec (1005 - 1099sup. (Atomindex citation 16:063092)

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作者
El Sayed Ali, M.; Toft Soerensen, O.;
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年度 1985
页码 1-14
总页数 14
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Cerium Oxides; Activation Energy; Diffusion; Dilatometry; Grain Boundaries; Isothermal Processes; Kinetics; Powder Metallurgy; Shrinkage; Sintering;

机译：氧化铈;活化能;扩散;膨胀测量;晶界;等温过程;动力学;粉末冶金;收缩;烧结;

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专利

1. Kinetics of competitive crystallization of β- and α-modifications in β-nucleated iPP studied by isothermal stepwise crystallization technique [J] . Alfréd Menyhárd, Gábor Dora, Zsuzsanna Horváth, Journal of Thermal Analysis and Calorimetry . 2012,第2期

机译：等温逐步结晶技术研究β-成核iPP中β-和α-变体竞争结晶的动力学
2. Kinetics of competitive crystallization of β- and α- modifications in β-nucleated iPP studied by isothermal stepwise crystallization technique [J] . Menyhárd A., Dora G., Horváth Z., Journal of thermal analysis and calorimetry . 2012,第2期

机译：等温逐步结晶技术研究β-成核iPP中β-和α-修饰的竞争结晶动力学
3. SINTERING KINETIC STUDY OF 2Y-TZP/AL_2O_3 COMPOSITE DURING INITIAL STAGE OF SINTERING [J] . Abhijit Ghosh, Soumyajit Koley, Ashok Kumar Sahu, Ceramic Engineering and Science Proceedings . 2009,第8期

机译：烧结初期2Y-TZP / AL_2O_3复合材料的烧结动力学研究
4. Investigation of the kinetics of spark plasma sintering of alumina ceramics.Part 1.The initial stage of sintering [C] . M S Boldin, A A Popov, E A Lantsev International Conference on Synthesis and Consolidation of Powder Materials . 2019

机译：氧化铝陶瓷火花血浆烧结动力学调查。烧结初期
5. Combined dilatometry and mass spectrometry of sintering and evolved gases of barium titanate and zirconium diboride with sintering additives . [D] . Moss, Murray. 2012

机译：钛酸钡和二硼化锆的烧结及析出气体的膨胀计量与质谱联用。
6. Influence of Obtaining Conditions on Kinetics of the Initial Sintering Stage of Zirconia Nanopowders [O] . Marharyta Lakusta, Igor Danilenko, Tetyana Konstantinova, 2016

机译：制备条件对氧化锆纳米粉体初始烧结动力学的影响
7. Initial sintering stage kinetics of Ce02 studied by stepwise isothermal dilatometry [O] . El Sayed Ali M., Sørensen Ole Toft 1985

机译：通过逐步等温膨胀测定研究了CeO 2的初始烧结阶段动力学
8. Kinetics of Initial Stage Sintering of Stoichiometric and Nonstoichiometric Actinide Oxides [R] . El Sayed Ali, M., Lorenzelli, R. 1977

机译：化学计量和非化学计量的act系元素氧化物初始烧结动力学

Initial Sintering Stage Kinetics of CeO sub 2 Studied by Stepwise Isothermal Dilatometry

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