Each crystal structure consists of alternating layers of silicon dioxide and a polymer material, so that the spacing between similar layers matches the wavelength of phonons.
每个晶体结构由相间的二氧化硅层和高分子聚合材料层组成，相同材料层之间的间距与声子的波长相匹配。
2
When the strain is removed, it forms a ripply surface, and the spacing of the ripples affects the colour of the laser light, which varies as the material is stretched.
Analyses the influence of some factors on the operation performance of inner coil, such as coil material, soil type, charging temperature, fluid flux, coil spacing and moisture content of soil, etc.