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高粘度熔体(熔液)中晶体生长的温场研究
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作者 张顺兴 施振华 《人工晶体学报》 CSCD 1991年第3期271-271,共1页
生长四硼酸锂晶体(Li_(2)B_(4)O_(7))的硼酸盐熔体和顶部籽晶法生长微型激光品体四磷酸钕锂(LiNdP_(4)O_(12))的磷酸盐助熔剂熔液,由于其粘度大、对流小、热传导小,在无温度梯度或小温度梯度场中几乎长不出晶体而呈玻璃态凝固。对流小... 生长四硼酸锂晶体(Li_(2)B_(4)O_(7))的硼酸盐熔体和顶部籽晶法生长微型激光品体四磷酸钕锂(LiNdP_(4)O_(12))的磷酸盐助熔剂熔液,由于其粘度大、对流小、热传导小,在无温度梯度或小温度梯度场中几乎长不出晶体而呈玻璃态凝固。对流小、排杂困难,容易引起组分过冷、晶体中包裹、云层等宏观缺陷,且很准消除。改变晶转和晶升速率也未能克服根本问题。 展开更多
关键词 晶体生长 四硼酸锂晶体 温场研究
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Cu单晶的生长与温场研究 被引量:2
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作者 肖怀安 朱世富 +4 位作者 赵北君 唐世红 王立苗 周义博 易希昱 《人工晶体学报》 EI CAS CSCD 北大核心 2009年第4期836-839,共4页
Cu单晶在中子单色器、激光核聚变和音频信号传输等方面有着广泛的应用前景。根据对Cu晶体的差热分析结果,设计并制作了硅钼棒加热单晶生长炉,获得了适合Cu单晶体生长的温场。采用改进的垂直布里奇曼法成功生长出外观完整、表面光滑、尺... Cu单晶在中子单色器、激光核聚变和音频信号传输等方面有着广泛的应用前景。根据对Cu晶体的差热分析结果,设计并制作了硅钼棒加热单晶生长炉,获得了适合Cu单晶体生长的温场。采用改进的垂直布里奇曼法成功生长出外观完整、表面光滑、尺寸为15 mm×35 mm的Cu单晶体。对生长的晶体进行切割、抛光腐蚀后,采用金相显微镜和X射线衍射分析,结果表明:研究设计的温场适合Cu单晶体的生长,生长出的晶体结晶性好、结构完整。 展开更多
关键词 铜单晶 温场研究 差热分析 晶体生长 性能表征
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Field study on thermal comfort of naturally ventilated residences in southwest China 被引量:3
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作者 MOU Di CAO Bin ZHU Ying-xin 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第7期2377-2387,共11页
Kunming,a city in southwest China,has a climate that is different from most of the other places in the world because of its unique geographical characteristics.Due to its temperate climate,most of the residential buil... Kunming,a city in southwest China,has a climate that is different from most of the other places in the world because of its unique geographical characteristics.Due to its temperate climate,most of the residential buildings in this region are naturally ventilated.Accordingly,a winter thermal comfort study was conducted in Kunming to reveal the thermal response of residents.Indoor and outdoor environmental parameters were measured,and participants were investigated about their clothing,thermal sensations,thermal preferences,and thermal acceptance using online questionnaires.Data from 162 valid questionnaires were collected in the survey.Although the climate is referred to as“mild”,the survey showed that the indoor temperature during winter was lower than the typical comfort range.Nevertheless,the participants responded that most of them felt neutral and comfortable.The neutral temperature of participants living in Kunming was determined to be 16.96℃.The acceptable thermal sensation vote(TSV)range of the residents is-0.72 to 1.52.The acceptable indoor air temperature range is 15.03℃to 19.55℃,and the optimum indoor air temperature is 17.2℃.According to this study,the existing thermal comfort evaluation models can hardly predict residents’thermal responses in Kunming well. 展开更多
关键词 thermal comfort field study thermal adaptation mild climate natural ventilation
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