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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 >Effect of CeO2 and Calcination Temperature on the Hydration Resistance of CaO Aggregate
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Effect of CeO2 and Calcination Temperature on the Hydration Resistance of CaO Aggregate

机译：CeO2和煅烧温度对CaO骨料抗水化性的影响

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Active lime was used to produce Ca(OH)2 fine power.And then Ca(OH)2 fine power with analytically pure CeO2 fine power 0, 0.2wt％, 0.4wt％, 0.6wt％,0.8wt％ and 1.0wt％ respectively were mixed via wet mixing.After drying and ball milling, the specimens were pressed and fired at 1450 ℃, 1500 ℃, 1550 ℃,1600 ℃ and 1650 ℃ respectively.The hydration resistance of the sample was evaluated by measuring the mass gain after soaking the samples in a chamber kept at 20 ℃ and 90％ relative humidity.The influence of CeO2 and calcine temperature on the hydration resistance of CaO aggregates were investigated by bulk density, apparent porosity, XRD, SEM and EDS analysis.The results show that: (1) The sintering of CaO aggregate was promoted by CeO2 addition and the hydration resistance of CaO aggregate was improved;(2) CeO2 mainly located in CaO grain boundary, some CeO2 dissolved in the CaO grains which improves CaO sintering;(3) The appropriate calcination temperature is 1550 ℃.When calcine temperature under 1550 ℃,the samples are sintered inadequately.The density and hydration resistance of CaO aggregate was nearly stable when calcine temperature over 1550 ℃.
机译：用活性石灰生产Ca（OH）2细粉，然后用分析纯的CeO2细粉0、0.2wt％，0.4wt％，0.6wt％，0.8wt％和1.0wt％的Ca（OH）2细粉。分别通过湿法混合进行混合。干燥和球磨后，分别在1450℃，1500℃，1550℃，1600℃和1650℃下压制和烧制样品。通过堆积密度，表观孔隙率，XRD，SEM和EDS分析研究了CeO2和煅烧温度对CaO团聚体耐水合性的影响。 ：（1）添加CeO2促进了CaO骨料的烧结，提高了CaO骨料的水合性;（2）CeO2主要位于CaO晶界，一些CeO2溶解在CaO晶粒中，从而改善了CaO的烧结;（3）适宜的煅烧温度为1550℃。在1550℃时，样品烧结不充分。当煅烧温度超过1550℃时，CaO骨料的密度和抗水合作用几乎稳定。

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