| 工艺条件对氧化铍凝胶注模坯体强度的影响 |
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| 引用本文： | 王小锋,王日初,彭超群,李婷婷,刘兵.工艺条件对氧化铍凝胶注模坯体强度的影响[J].功能材料,2011,42(7). |
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| 作者姓名： | 王小锋 王日初 彭超群 李婷婷 刘兵 |
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| 作者单位： | 中南大学材料科学与工程学院,湖南长沙,410083 |
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| 基金项目： | 国家民口配套科研资助项目(MKPT-03-182) |
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| 摘 要： | 研究单体浓度（AM）、单体/交联剂比例（AM/MBAM）、反应温度和固相体积分数等工艺条件对氧化铍凝胶注模坯体强度的影响,并从自由基聚合反应角度分析各因素对纯凝胶强度和均匀性的影响的原因,得出各因素较合适的参数范围。结果表明纯凝胶和坯体强度随着单体浓度的增加而增加,但过高的单体浓度会使结构均匀性变差,因此单体浓度较合适的范围为10%～20%（质量分数）;随着AM/MBAM比例的增加,坯体强度降低,均匀性下降,AM/MBAM比例应控制在20∶1与30∶1之间;随着反应温度的升高,凝胶强度起初逐渐减低而后又升高,但凝胶均匀性则为先逐渐增加而后又减低,反应温度应控制在20～35℃范围内;随着固相体积分数的增加,凝胶注模坯体强度逐渐下降,但均匀性却升高,因此在满足坯体强度要求的前提下,固相体积分数应尽可能的较高。
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| 关 键 词： | 凝胶注模 坯体强度 凝胶强度 工艺条件 BeO |
Effect of process conditions on strength of BeO green body prepared by gelcasting |
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| WANG Xiao-feng,WANG Ri-chu,PENG Chao-qun,LI Ting-ting,LIU Bing.Effect of process conditions on strength of BeO green body prepared by gelcasting[J].Journal of Functional Materials,2011,42(7). |
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| Authors: | WANG Xiao-feng WANG Ri-chu PENG Chao-qun LI Ting-ting LIU Bing |
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| Affiliation: | WANG Xiao-feng,WANG Ri-chu,PENG Chao-qun,LI Ting-ting,LIU Bing(School of Materials Science and Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | The effect of process conditions(monomer concentration,monomer/crosslinker ratio,reaction temperature and solids loading of suspension)on strength of green body prepared by gelcasting was investigated.The change reason of the strength and homogenization of pure gels was analyzed based on free-radical polymerization theory,and the ranges of each process parameters were achieved.The results show:the strength of pure gel and green body increase with increasing monomer concentration,but the homogenization of th... |
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| Keywords: | gelcasting green body strength gel strength process condition BeO |
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