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鸣沙被誉为神奇的自然现象,曾引起国内外学者的极大兴趣,并对其发声机制提出种种推测和假说.近一个多世纪以来,尽管国内外学者做了大量的研究工作,但对鸣沙形成机制迄今仍无令人信服的解释.近来,加拿大学者Goldsack等研究认为,鸣沙发声来源于沙粒表面沉积的SiO_2凝胶,其理由是:鸣沙不仅表面确有SiO_2凝胶存在,而且其表面SiO_2凝胶有着与工业硅胶相同的表面化学组成和相同的发声频谱.实际上,他还未揭示鸣沙发声的本质.值得指出是,沙粒表面SiO_2凝胶与工业硅胶不仅有着相同的表面化学组成,而且有着相同的多孔的表面物理结构.为进一步论证石英颗粒表面物理结构对鸣沙声发射的贡献,作者等最近做了以下有趣的实验.
Mingsha has been praised as a magical natural phenomenon, which has aroused great interest of scholars at home and abroad, and put forward various hypotheses and hypotheses about its vocal mechanism.For more than a century, despite a great deal of research work by domestic and foreign scholars, So far, there is no convincing explanation for the mechanism of the formation of the mingles. Recently, Canadian scholar Goldsack et al. Concluded that the sound of mingles originated from the SiO 2 gel deposited on the surface of the sand. The reason is that not only the surface of the mingles , And its surface SiO_2 gel has the same surface chemical composition and the same sound frequency spectrum as industrial silica gel.In fact, he has not yet revealed the nature of the sound of the sounding of the sofa.It is worth pointing out that the SiO_2 gel on the surface of the sand and the industrial silica gel not only have The same surface chemical composition, and has the same porous surface physical structure.In order to further demonstrate the contribution of the physical structure of the quartz particle surface to the sound emission of sand, the authors have recently made the following interesting experiments.