| 聚丁二炔(Polydiacetylene)单晶中量子成核和热成核相变过程 |
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| 引用本文： | 彭景翠,胡慧芳.聚丁二炔(Polydiacetylene)单晶中量子成核和热成核相变过程[J].湖南科技大学学报(自然科学版),1993(2). |
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| 作者姓名： | 彭景翠 胡慧芳 |
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| 作者单位： | 湖南大学应用物理系，湘潭矿业学院基础课部 长沙 410082 |
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| 摘 要： | 本文研究聚丁二炔(Polydiacetylene)中的量子成核和热成核相变过程。在从PDB相向PDA相的相变过程中。会出现一个畴壁;相反,在从PDA相向PDB相的相变过程中,会出现一个反畴壁。我们认为,畴壁的形成是一种涨落的结果;利用统计物理的方法,对两种成核过程进行了详细的讨论,发现在ETCD-PD中,主要是热成核相变;而在ETDU-PD中,主要是量子成核相变,与实验事实符合。图5,参13
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| 关 键 词： | 相变 热成核过程 量子成核过程 畴壁 结合能 六激发 |
THE PROCESSES OF QUANTUM AND THERMAL NUCLEATION IN POLYDIACETYLENES SINGLE CRYSTALS |
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| Peng Jingcui.THE PROCESSES OF QUANTUM AND THERMAL NUCLEATION IN POLYDIACETYLENES SINGLE CRYSTALS[J].Journal of Hunan University of Science & Technology(Natural Science Editon),1993(2). |
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| Authors: | Peng Jingcui |
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| Abstract: | The processes ot quantum and thermal nucleation in polyacetylenes single crystals is investigated. A domain wall will be appeared during transition from PDB-to PDA-phase, by contrast, an anti-domain wall will be appear when transiting from PDA-to PDB-phase. We treat this domain wall (anti-domain wall) as an elementary excitation, and have calculated the binding energies of domain wall (anti-domain wall) using the method of statistical physics. We discussed these nucleation processes in detail, and found that the transition in ETCD-polydiacetylene is thermal nucleation, and in TCDU-polydia-cetylene is quantum nucleation mainly. It is agreement with experiment. 5figs, 13refs. |
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| Keywords: | phase transition process of thermal nucleation process of nucleation domain wall binding energy elementary excitation |
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