具有实际温度梯度的气凝胶隔热材料掺杂方法研究

来源 :2016’中国溶胶-凝胶学术研讨会暨国际论坛 | 被引量 : 0次 | 上传用户：liuyi8431201

【摘要】

：

超级隔热材料二氧化硅气凝胶被广泛用于各种航天器、飞行器的热防护中。添加遮光剂或纤维能大大改善其在高温下的隔热性能。本文中假设遮光剂颗粒为球形,掺杂纤维为无限长圆柱,通过计算遮光剂及纤维的辐射特性得到不同温度下最优掺杂粒径,并在复合材料等效热导率最小时得到不同温度下的最佳掺杂量。研究发现：遮光颗粒和纤维的最佳掺杂直径随温度增加而减小,掺杂量随温度增加而增加,研究的四种遮光剂(碳黑、SiC、ZrO2和

【作者】

：

郭江峰赵越唐桂华

【机构】

：

西安交通大学能源与动力工程学院,西安710049 西安热工研究院有限公司,西安710054

【出处】

：

2016’中国溶胶-凝胶学术研讨会暨国际论坛

【发表日期】

：

2016年11期

【关键词】

：

气凝胶掺杂优化工程实践实验研究

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具有实际温度梯度的气凝胶隔热材料掺杂方法研究

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