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北京石油化工学院2026年研究生招生接收调剂公告
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INTRODUCTION
It is well known that the expansive behavior of in situ magnesium aluminate spinel (MgAl2O4)1 can generate two opposite behaviors when formed in the refractory castables’ matrix: if, on one hand, it can close joints and generate compressive stresses2, on the other it can also spoil the castables’ mechanical and corrosion / infiltration properties if poorly designed. Considering these aspects, great efforts have been placed in order to produce spinel-forming castables with a designed permanent expansion, taking into account the grain size of the reactants, the binder source, the presence of liquid phase and so on.Nevertheless, most of the conducted studies were usually developed considering anexpansion-free condition, which is not representative of the service structuralconditions that allow only restricted volumetric change.

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英语留级生: 金币+10, 翻译EPI+1, 有帮助 2014-09-11 16:49:20
引言
众所周知,当在耐火浇注料的基质上形成时,原位铝酸镁尖晶石(MgAl2O4)【1】的膨胀反应可以产生两种截然相反的行为:一方面,它可以密缝和产生压应力【2】,另一方面如果设计不当它也可以破坏浇注料的机械和腐蚀/渗透性能。考虑到这些方面,加倍努力为生产出成尖晶石浇注料,它具有永久性膨胀的设计,考虑反应物的粒度、粘结剂来源,液相的存在等等。然而,进行的大多数研究通常考虑无膨胀条件的开发,这并不代表当务的结构条件,只允许限制体积变化。
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