| 铝酸钙水泥对氧化镁系包埋料性能的影响 |
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| 引用本文： | 余桂林,李楠,李友胜,王贻宁.铝酸钙水泥对氧化镁系包埋料性能的影响[J].武汉冶金科技大学学报,2010(2):160-163. |
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| 作者姓名： | 余桂林 李楠 李友胜 王贻宁 |
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| 作者单位： | [1]武汉科技大学医学院,湖北武汉430065 [2]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081 [3]武汉大学口腔医学院,湖北武汉430072 |
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| 基金项目： | 武汉科技大学博士科研启动基金资助项目（J090097）. |
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| 摘 要： | 以铝酸钙水泥作为结合剂、电熔氧化镁和电熔白刚玉作为原料以及刚玉球作为混磨介质，在聚氨酯滚筒中混磨2h后制得氧化镁系包埋料，研究结合剂铝酸钙水泥含量对氧化镁系包埋料性能的影响。结果表明，随着铝酸钙水泥含量的增加，氧化镁系包埋料的初凝时间缩短，流动性变差；对比110℃热处理试样，经900℃热处理试样显气孔率上升，体积密度下降。当铝酸钙水泥含量大于20％时，铝酸钙水泥的加入可明显地提高氧化镁系包埋料的耐压强度。
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| 关 键 词： | 铝酸钙水泥 包埋料 流动性 耐压强度 |
Influence of CA cement on properties of MgO-based investment materials |
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| Authors: | Yu Guilin Li Nan Li Yousheng Wang Yining |
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| Affiliation: | 1. College of Medical Science, Wuhan University of Science and Technology, Wuhan 430065, China; 2. The State Key Laboratory Breeding Base of Refractories and Ceramics, Wuhan University of Science and Technology, Wuhan 430081, China; 3. College of Stomatology, Wuhan University, Wuhan 430072, China) |
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| Abstract: | To prepare MgO-based investment materials, CA cement as binder, MgO and Al2O3 as raw materials were mixed for 2 h in polyurethane pots using alumina balls. The influence of CA cement on the properties of MgO-based investment materials was studied. The results show that, with the in- crease in CA cement content, the fluidity of MgO-based investment materials decreases and so does the initial setting time. The apparent porosity of the specimen heated at 900℃ increases and the bulk density decreases, as compared with the specimen heated at 110 ℃. When CA cement content is more than twenty percent, the compressive strength of the investment increases with the increase of CA cement content. |
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| Keywords: | CA cement investment material fluidity compressive strength |
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