纳米粒子的熔点与粒径的关系

瞿金蓉; 胡明安; 陈敬中; 韩炜

Volume 30 Issue 2

Mar. 2005

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JU Jin-rong, HU Ming-an, CHEN Jing-zhong, HAN Wei, 2005. Nanoparticle Size and Melting Point Relationship. Earth Science, 30(2): 195-198.

Citation:

JU Jin-rong, HU Ming-an, CHEN Jing-zhong, HAN Wei, 2005. Nanoparticle Size and Melting Point Relationship. Earth Science, 30(2): 195-198.

JU Jin-rong, HU Ming-an, CHEN Jing-zhong, HAN Wei, 2005. Nanoparticle Size and Melting Point Relationship. Earth Science, 30(2): 195-198.

Citation:

JU Jin-rong, HU Ming-an, CHEN Jing-zhong, HAN Wei, 2005. Nanoparticle Size and Melting Point Relationship. Earth Science, 30(2): 195-198.

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Nanoparticle Size and Melting Point Relationship

Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China

Received Date: 2004-07-15
Publish Date: 2005-03-25

Abstract

Abstract

To deduce the quantitative relationship between the melting point of nanoparticles and their radius, and set forth the sintering processes of nano-systems and the qualitative relation between the sintering temperature and the radius of nanoparticles from a thermodynamics angle, the phase transition process between solid and liquid states has been proposed, and thermodynamics and surface chemistry theories and phase equilibrium conditions were used. The relationship was applicable to lead (Pb). The results show that owing to its small size and high special surface free energy, the chemical potential of a material in the form of nanoparticles was much higher than that of the bulk. As a result, the melting point of nanoparticles was depressed in comparison to that of the bulk crystals. The calculated results for met al lead were coincident with the experimental ones. So there is a relationship between the melting point and the sintering temperature of a nanoparticle and its radius. The smaller the nanoparticle radius, the lower the melting point and sintering temperature.
- nanoparticle,
- melting point,
- sintering temperature,
- radius

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References(22)

References

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