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首页> 外文会议>第七届国际耐火材料学术会议（ISR2016）论文集 >Impact of Functional Additives on the Properties of Al2O3-C Slide Gate Plate Refractories
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Impact of Functional Additives on the Properties of Al2O3-C Slide Gate Plate Refractories

机译：功能添加剂对Al2O3-C滑动门耐火材料性能的影响

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Al2O3-C refractories are widely used as functional elements like nozzles, well blocks, sliding gate plates and stoppers in the continuous casting process of steel production.Application of silicon as a metallic agent in Al2OS-C slide gate plate production is usual.In fact, a non-oxide bond can be generated due to the reaction between silicon and carbon under reducing atmosphere in the plate matrix.This non-oxide bond can enhance the mechanical strength and abrasion resistance.In order to improve the mechanical and thermo-mechanical properties,functional additives can be aimed to lower the sintering temperature and tailor the microstructure.For this reason, the effect of a special solid state sintering aid addition on the microstructure and thermo-mechanical properties of Al2O3-C slide gate plates in the presence of Si as a metallic component has been investigated.Two types of samples were pressed at 150 Mpa,tempered at 200℃ and fired in coke bed at 1400℃,respectively.Physical (BD and AP), mechanical (CCS and MOR) and thermo-mechanical (HMOR) properties were determined, in addition, phase compositions were characterized by X-ray diffraction analysis (XRD) and microstructures of samples were investigated by field emission scanning electron microscopy (FESEM).Results have shown that the addition of sintering aid increased the generation of cation vacancy in Al2O3 structure which enhanced the cation diffusion and densification process;consequently, CCS, MOR and HMOR of samples increased drastically while bulk density and apparent porosity remained unchanged.
机译：Al2O3-C耐火材料被广泛用作钢铁生产的连铸过程中的喷嘴，孔块，滑门板和塞子等功能元素，而硅作为金属试剂在Al2OS-C滑门板生产中的应用很普遍。由于在还原性气氛中，硅和碳之间的反应会在板基中产生非氧化物键，这种非氧化物键可以增强机械强度和耐磨性，从而改善机械性能和热机械性能因此，功能性添加剂的目的是降低烧结温度并调整微观结构。因此，在存在硅的情况下，添加特殊的固态烧结助剂对Al2O3-C滑动门板的微观结构和热机械性能的影响两种类型的样品分别在150 Mpa的压力下加压，200℃的温度回火和1400℃的焦炭床中烧成。物理（BD和A P），机械性能（CCS和MOR）和热机械性能（HMOR），并通过X射线衍射分析（XRD）对相组成进行表征，并通过场发射扫描电子显微镜（FESEM）研究样品的微观结构结果表明，烧结助剂的加入增加了Al2O3结构中阳离子空位的产生，增强了阳离子的扩散和致密化过程;因此，样品的CCS，MOR和HMOR急剧增加，而堆积密度和表观孔隙率保持不变。

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