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盐水振荡与液膜振荡耦合 被引量:3
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作者 贺占博 周永贤 《物理化学学报》 SCIE CAS CSCD 北大核心 2004年第7期759-762,共4页
为进一步增大盐水振荡产生的电势差,并使盐水振荡可逆,该文将液膜振荡与盐水振荡耦合,组成一个耦合的振荡器.实验结果发现:(1)由于两振荡器耦合形成共振,所以此耦合振荡器的振幅明显增大;(2)耦合后的化学振荡器变为可逆振荡器.耦合振荡... 为进一步增大盐水振荡产生的电势差,并使盐水振荡可逆,该文将液膜振荡与盐水振荡耦合,组成一个耦合的振荡器.实验结果发现:(1)由于两振荡器耦合形成共振,所以此耦合振荡器的振幅明显增大;(2)耦合后的化学振荡器变为可逆振荡器.耦合振荡机理如下:扩散过程中形成的缔合物存于油相,难溶于水,通电后缔合物发生解离,因此造成反扩散,形成可逆振荡,且可逆程度及逆反应产生的电势差(即振幅)大大提高,扩展了盐水振荡在二次电池开发方面的应用. 展开更多
关键词 盐水振荡 液膜振荡 表面活性剂 耦合
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一种界面上的振荡现象——盐水振荡 被引量:3
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作者 周永贤 贺占博 《化学工业与工程》 CAS 2004年第2期117-120,共4页
将盛有盐水溶液、底部有小孔的内套管垂直放入盛有蒸馏水的外套管中,小孔处可以观察到流体上下振荡,这种现象被称为盐水振荡。本文详细地介绍盐水振荡的现象、机理和数学模型,分析化学振荡产生的必要条件,提出盐水振荡是在浓度差引起的... 将盛有盐水溶液、底部有小孔的内套管垂直放入盛有蒸馏水的外套管中,小孔处可以观察到流体上下振荡,这种现象被称为盐水振荡。本文详细地介绍盐水振荡的现象、机理和数学模型,分析化学振荡产生的必要条件,提出盐水振荡是在浓度差引起的重力作用下,灵敏初条件被破坏,产生流体振荡,流动电势引发盐水振荡的电现象。通过对三种穿过界面扩散所形成的振荡现象———液膜振荡、固体膜振荡与盐水振荡进行比较,提出将三种振荡有机结合,可改进化学振荡器的性能和应用前景。 展开更多
关键词 液膜振荡 固体膜振荡 盐水振荡 非线性动力学
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盐水振荡研究的新发现 被引量:1
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作者 周永贤 贺占博 《无机化学学报》 SCIE CAS CSCD 北大核心 2004年第4期459-464,共6页
More than twenty electrode methods were used to detect widely and systematically the salt - water oscillator designed by us and some rule conclusions were summarized by correlation analysis of experimental results,as ... More than twenty electrode methods were used to detect widely and systematically the salt - water oscillator designed by us and some rule conclusions were summarized by correlation analysis of experimental results,as the follows:(1)As different electrodes used to detect the same salt water oscillator,all of the time oscillatory parame - ters are the same,while the amplitude different which proportion the average ionization energy of the metals when detected by a series of double metal electrodes.As the multiple electrodes used,the amplitudes are direct ratio to the metal electrode potential E 0 .In addition,phase position of the electrodes has great role on the amplitude,that is,the bigger can be gotten when the indicatory electrode at the outer than it at the inner.(2)A series of detec - tions by ionic selective electrodes on the positive/negative ions of a same electrolyte show that the smaller the difference of the two ionic transference number is,the bigger the amplitude is;and not only the oscillation curve of the non - ionic compound is irregular,but also the amplitude is small.It is obvious that the cooperation of ions play an important role in the salt - water oscillation.And there are such rule of the amplitudes resulted from the different electrodes:the metal electrode(reference electrodes)>a couple of metal electrode>the ionic selective electrode(reference electrodes);(3)only when the solution density of the inner is bigger than that the outer,the oscillations happen.It means the gravity may have a key effect on the oscillation.(4)The periodic changes of temperature and conductivity in salt - water oscillation were also been found from precision determination.(5)At last,some mechanism analysis were put forward. 展开更多
关键词 化学振荡 盐水振荡 金属电极 参比电极 离子选择电极 盐水密度 监测
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