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热分析技术在褐铁矿结晶水热分解中应用研究李金莲1,刘万山1,李艳茹1,任伟1,周明顺1(1.辽宁省鞍山市鞍钢股份有限公司技术中心)摘 要:利用热分析(TG,DTG,DSC)技术,在一定升温速率(β=10℃/min)下对褐铁矿结晶水热分解进行非等温动力学研究,采用Coats-Redffen法求解了褐铁矿结晶水热分解过程的活化能.结果表明:褐铁矿结晶水热分解过程是一个缓慢-快速-缓慢的过程,其在烧结过程中吸收热量与结晶水含量不成正相关,而与热分解活化能成正相关. 关键词:褐铁矿； 结晶水； 活化能； ......
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process of the sample complies with the diffusion one-way transport mechanism. The corresponding activation energy values calculated at 5, 10 and 15 ℃/min are 247.009, 251.307 and 196.26 kJ/mol, and pre... by activation energy index is put forward. This method has some excellences with quick test velocity, little quantum of sample consumption, and low test cost, so it can be applied in spontaneous combustion......
that the metastable phase Al 8Fe 4Nd transformed to α Al 13 (Fe, V) 3Si phase when the alloy was heated. The activation energy E = (2.48±0.09) eV is agree with that of Fe atom diffusion in aluminum... solidification; dynamics of phase transformation; activation energy; Received: 1999-07-30 快速凝固 (RS) Al-Fe-V-Si合金以其优异的室温和高温综合力学性能成为近年来航空, 航天新材料研究开发的热点 [1] . 研究发现 [2......
and 1.61,and the activation energies as 121, 40 and 67kJ/mol for E, B and C type serration respectively. The main mechanism for dynamic strain aging discussed in light of the strain exponent and the activation energy. Key words:dynamic strain aging; serrated flow; strain exponent; activation energy; [全文内容正在添加中] ......
activation energy at Tg and Tx was calculated. Key words: Mg65Cn25Gd10 alloy; magnesium amorphous alloys; mechanical alloying; thermal stability; apparent activation energy 1 Introduction Although... from the DSC traces with an accuracy of ±1 K. The apparent activation energy E for the glass transition and the crystallization transition can be evaluated by Kissinger equation: = ......
微波改性对吸附剂脱硫脱氮性能的影响研究韩庆虹1,2,金永龙2,苍大强0,刘金鑫1(1.北京市北京科技大学 冶金与生态工程学院2.辽宁省鞍山市辽宁科技大学材料科学与工程学院)摘 要:以精炼炉渣和粉煤灰为原料,采用微波工艺制备了吸附剂.在固定装置中进行了同时脱硫脱氮的实验.探讨了微波改性吸附剂表面特性的实验时微波功率,加热时间,配比等实验因素对吸附剂表面特性的影响.研究了微波改性前后吸附剂的表观活化能和微波改性吸附剂脱硫脱氮的机理.实验结果表明,微波改性后的吸附剂吸附活化能显著降低,微波改性可以增强吸附剂脱硫脱氮的......
equation, the main material parameters such as α, β, n, and DRX activation energy, Q, were calculated. In addition, the evolution of Q with strain rate and temperature was revealed as a 3D response surface. Key words: Ti-6Al-2Zr-1Mo-1V alloy; dynamic recrystallization; flow stress; strain hardening rate; activation energy 1 Introduction Ti-6Al-2Zr-1Mo-1V alloy has been extensively used......
from apparent activation energy together. The results show that, when the calcination temperature is low, few magnesium ferrites form in low silica magnesium pellets and unreacted MgO exists... the pellet swelling rate. Key words: low silica magnesium pellet; calcination temperature; reduction swelling rate; apparent activation energy 还原膨胀率是球团矿的重要冶金性能指标之一.一般球团矿在还原过程中都会出现体积膨胀,强度相应降低的情况.球团矿体积膨胀......
