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Observation and Analysis of Gypsum Particleboard using SEM 被引量:3
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作者 冯谦 kim Hyunjoong kim sumin 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第1期44-47,共4页
The microstructures of gypsum board and gypsum particleboard were observed by SEM. The effects of retarder and waterproof agent on the shape and the average dimension of the gypsum crystal were discussed. The mechanis... The microstructures of gypsum board and gypsum particleboard were observed by SEM. The effects of retarder and waterproof agent on the shape and the average dimension of the gypsum crystal were discussed. The mechanism was investigated as well. Four typical instances, i e, the gypsum crystal shape, the gypsum combined with particles on the particles surface, the gypsum combined with particles on the wood cross section and the gypsum combined with particles inside the wood cell cavity were selected and observed. Furthermore, the agglomeration and cementation mechanism between gypsum and particle were studied. 展开更多
关键词 crystal shape gypsum particleboard ADDITIVE
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Co含量对磁性非晶合金Fe85-xCoxTi7Hf6B2电学特性的影响 被引量:2
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作者 陈澄 黄琳 +3 位作者 kim sumin 朴红光 Haein Choi-Yim kim Dong-Hyun 《稀有金属》 EI CAS CSCD 北大核心 2019年第7期693-698,共6页
研究了由单铜辊真空熔融纺丝技术制备的扁平带状铁基磁性非晶态合金Fe(85-x)CoxTi7Hf6B2(x=20, 30, 35,原子分数)的电学特性。这种软铁磁性非晶合金与其他含FeCo类合金一样,当Co含量达到30%附近时其饱和磁化强度会呈现最大值。尽管如此... 研究了由单铜辊真空熔融纺丝技术制备的扁平带状铁基磁性非晶态合金Fe(85-x)CoxTi7Hf6B2(x=20, 30, 35,原子分数)的电学特性。这种软铁磁性非晶合金与其他含FeCo类合金一样,当Co含量达到30%附近时其饱和磁化强度会呈现最大值。尽管如此,体系中Co含量的改变并没有对这种铁基非晶合金的磁性能产生较大的影响。值得注意的是,在这种铁基非晶合金体系中Co含量的改变可导致其电学特性发生显著的转变。比如:当Co含量为20%时,其电阻温度系数为负值,表现出类似于半导体的电阻温度特性和P型半导体的电学特性;然而,当Co含量增加到30%和35%时,其电阻温度系数则转变为正值,呈现出类似一般金属导体的电阻温度特性。不仅如此,根据该非晶合金中各组成元素的电负性和电离势揭示了Co含量可调控载流子(空穴)浓度的物理机制,为新型铁基非晶合金材料的设计提供新方法。 展开更多
关键词 非晶态合金 软铁磁性能 磁性半导体 电阻温度系数
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