Yunnan has attracted great attention,from the world for its ideal location, advantaged climatic condition, rich bioh;gical resources and cheap labor forces. All these advantaged conditions make Yunnan become one of th...Yunnan has attracted great attention,from the world for its ideal location, advantaged climatic condition, rich bioh;gical resources and cheap labor forces. All these advantaged conditions make Yunnan become one of the most potential places in the worhl for flower production and trade, In recent years, more and more foreign companies from different countries have forestalled their facilities in Yunnan, joining in the development process of Yunnan floriculture industry. The flower industry in Yunnan Province started to develop towards the end of the 1980s, Flower was only planted one hectare output totaled 35.000 yuan, and the planting area of the flower had 17,000ha and the sales volume of the flowers had 6 billion yuan in 2006. Yunnan Province accounts for 50% of the nation＇s total cut flower production. Yunnan＇s .flower industry＇ has become Asia＇s largest fresh-cut flower production and export base and sprout breeding and production base. And it has stepped into one of the major fresh-cut.flower production areas in the world and a modern flower trading center that is leading in China.展开更多
以提钒尾渣为初始原料,经碳热还原除铁处理后得到的提铁尾渣为主要原料,石墨材料为改性剂,采用粉末冶金方法进行了高温显热蓄热材料制备的试验研究。XRD物相分析结果表明,蓄热材料的主要物相包括Na6.65Al6.24Si9.76O32、多元素组成的铝...以提钒尾渣为初始原料,经碳热还原除铁处理后得到的提铁尾渣为主要原料,石墨材料为改性剂,采用粉末冶金方法进行了高温显热蓄热材料制备的试验研究。XRD物相分析结果表明,蓄热材料的主要物相包括Na6.65Al6.24Si9.76O32、多元素组成的铝硅酸盐、钛铁矿以及石墨。随着石墨含量的增加,蓄热材料密度和硬度均有下降趋势,而导热系数呈增长趋势。DSC测试结果表明,在500℃以上的中高温区域比热容数值较高。蓄热密度计算结果表明,在500~750℃范围内,显热蓄热材料蓄热密度为223 k J/kg,蓄热量为0.062 k Wh/kg,1 000 k Wh所需质量为16 000 kg。本研究制备的蓄热材料在500℃以上的温度范围内具有良好的蓄热能力,适用于高温蓄热系统当中。展开更多
基金the Natural Science Foundation of Yunnan Province （Grant No.2002C00201）.
文摘Yunnan has attracted great attention,from the world for its ideal location, advantaged climatic condition, rich bioh;gical resources and cheap labor forces. All these advantaged conditions make Yunnan become one of the most potential places in the worhl for flower production and trade, In recent years, more and more foreign companies from different countries have forestalled their facilities in Yunnan, joining in the development process of Yunnan floriculture industry. The flower industry in Yunnan Province started to develop towards the end of the 1980s, Flower was only planted one hectare output totaled 35.000 yuan, and the planting area of the flower had 17,000ha and the sales volume of the flowers had 6 billion yuan in 2006. Yunnan Province accounts for 50% of the nation＇s total cut flower production. Yunnan＇s .flower industry＇ has become Asia＇s largest fresh-cut flower production and export base and sprout breeding and production base. And it has stepped into one of the major fresh-cut.flower production areas in the world and a modern flower trading center that is leading in China.
文摘以提钒尾渣为初始原料,经碳热还原除铁处理后得到的提铁尾渣为主要原料,石墨材料为改性剂,采用粉末冶金方法进行了高温显热蓄热材料制备的试验研究。XRD物相分析结果表明,蓄热材料的主要物相包括Na6.65Al6.24Si9.76O32、多元素组成的铝硅酸盐、钛铁矿以及石墨。随着石墨含量的增加,蓄热材料密度和硬度均有下降趋势,而导热系数呈增长趋势。DSC测试结果表明,在500℃以上的中高温区域比热容数值较高。蓄热密度计算结果表明,在500~750℃范围内,显热蓄热材料蓄热密度为223 k J/kg,蓄热量为0.062 k Wh/kg,1 000 k Wh所需质量为16 000 kg。本研究制备的蓄热材料在500℃以上的温度范围内具有良好的蓄热能力,适用于高温蓄热系统当中。
