Most of the solid material are constructed from a variety of different shapes of the particles become, therefore, fine particles of the material shape and size has an important impact on the structure and properties of the material. Especially for nanomaterials, the particle size and shape on the properties of the material plays a decisive role. Therefore, nanomaterials particle size, shape characterization, and control is of great significance. General solid material particle size particle size can be used to describe the concept. However, due to the complexity of the shape of the particles is generally difficult to directly use a scale to describe a particle size, and therefore, the particle size is widely used in the description of the process of the concept of equivalent particle size. For the different principles of particle size analysis instruments, measuring principle is based on the different characteristics of the particle is not the same, only the equivalent contrast, a direct comparison can not be laterally. Such as sedimentation particle size analyzer is based on an equivalent comparison settling velocity of particles in contact angle measurement, the measured vertical diameter of settling velocity equivalent diameter, which uses the same diameter as measured particle settling velocity of homogeneous spherical particles to representative of the actual size of the particles. Diameter of the laser particle size analyzer is the use of a laser diffraction and scattering characteristics as an equivalent contrast, the measured particle size of the equivalent diameter of the equivalent scattering, i.e., actual measured particles having the same scattering effect of the spherical particles to represent the actual size of the particles. When the measured particle is spherical, its particle diameter is equivalent to its actual diameter. Molding process is one of the most common plastic material, the oldest molding method, and is a process for research material properties of the most commonly used. It has a molding apparatus is simple, small investment in equipment, simple mold structure and other characteristics, in mechanization and automation of production today's highly developed high-temperature contact angle measurement, still one of the one of the most popular means of production. However powder contact angle measurement, compression molding die design can refer to the literature in addition to textbooks, monographs written several predecessors, mold design legend, few people die design summary of key skills. And the particle volume (V) relationship can be represented by an expression D = 1.24V1 / 3 Fig. In addition, particle size and particle size distribution data for a variety of different analytical methods may not be obtained confirm each other, can not be absolutely horizontal comparison. ? Since the particle size of the powder material is widely distributed, from nanometer to millimeter level, so when describing the material particle size, the particles can be divided according to the size of the nano-particles, ultrafine particles, particles, fine, coarse, etc. species. These particles may be based on the type of particle size analysis using the corresponding methods and instruments. One of the important indicators of recent years, with the rapid development of nanoscience and technology, particle size distribution and particle size nanomaterials characterization of nanomaterials has become, in the ordinary material particle size analysis, particle size of their research in general 100nm ~ 1um size range. Faced with nano-materials research, their greatest concern scales. Intravenous contact angle measurement instrument | Longquan contact angle measuring instrument | ShengDing instruments provided by the Dongguan City Sheng Ding Precision Instrument Co., Ltd .. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) strong, credible, in Dongguan, Guangdong dedicated instrumentation industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead ShengDing into the glorious instrument and you work for a better future!