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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 >The Effect of La2O3 Addition on the Hydration Properties of CaO Clinker
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The Effect of La2O3 Addition on the Hydration Properties of CaO Clinker

机译：La2O3添加对CaO熟料水化性质的影响

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摘要

To obtain high density, low porosity, good hydration resistance of CaO clinker, the effects of La2O3 content on physical properties, such as sintering property and hydration resistance of CaO clinker were carried out in this paper.Apparent porosity and bulk density were measured by using Archimedes principle with kerosene as the medium.Two methods were used to test hydration resistance of CaO clinker, one was carried out in a humidity cabinet at 20 ℃ and with 90％ relative humidity.Another was boiling method.SEM and EDS characterization analyses of CaO clinker were performed to observe gather microstructural information and hydration mechanism was put forward.The results showed that:1) The sample with 0.79 wt.％ La2O3 addition had lower apparent porosity, and the bulk density was higher simultaneously.2) The hydration weight gain of CaO clinker with 0.79 wt.％ La2O3 addition was lower,which is less than 1％ after 20 days.3) La2O3 was mainly distributed in the grain boundary, and a small amount of La2O3 was dissolved in grain.The average grain size of CaO samples with 0.79 wt.％ La2O3 addition sintered at 1450 ℃, 1550 ℃, 1650 ℃, is 44.5 μm, 48.6 μm, 63.5 μm, respectively.4)Solid solution was formed due to the similar ionic radius of La3+ and Ca2+, which promoted the sintering of CaO clinker and improved the hydration resistance simultaneously.
机译：为了获得高密度，低孔隙率，良好的CaO熟料抗水化性，本文研究了La2O3含量对CaO熟料的烧结性能和抗水化性等物理性能的影响。以煤油为介质的阿基米德原理。用两种方法测试CaO熟料的耐水合性，一种是在20℃，相对湿度为90％的湿度箱中进行。另一种是沸腾法。CaO的SEM和EDS表征分析结果表明：1）添加0.79 wt。％La2O3的样品表观孔隙率较低，同时其堆积密度较高。2）水化增重添加0.79 wt。％La2O3的CaO熟料的含量较低，在20天后不到1％。3）La2O3主要分布在晶界中，并且很小La2O3溶解在晶粒中。添加0.79 wt。％La2O3的CaO样品在1450℃，1550℃，1650℃烧结的平均晶粒尺寸分别为44.5μm，48.6μm，63.5μm。4）固溶体为由于La3 +和Ca2 +的离子半径相似，因此形成了CaO，从而促进了CaO熟料的烧结并同时提高了耐水化性。

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  • 作者

    YU Hui; HAN Bingqiang; ZHANG Tao; WEI Yaowu; LI Nan;

  • 作者单位

    The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;

    The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;

    The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;

    The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;

    The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;冶金工业;
  • 关键词

    CaO clinker; hydration resistance; solid state sintering;

    机译：CaO熟料;抗水合;固态烧结;

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