Spring Meeting of the Japan Society of Powder and Powder Metallurgy, 2022

Exhibitors' information

[E-1] Nihon Techno-Plus Co., Ltd.

Nihon Techno-Plus Co., Ltd.

As is well known, molecular organic compounds cannot be used or reported as materials without identification. It is easily imagined that this obligation was introduced to avoid confusion due to reports without identification. However, it is not required to identify inorganic solid compounds such as inorganic powder materials. Even in the nomenclature of inorganic solid compounds by International Pure and Applied Chemistry (IUPAC), it has been shown that it is difficult to give a name that exactly reflects a fine structure. Thus, it is not possible to identify inorganic solid compounds. In the field of materials science, there is a certain "give up", i.e., the performance, characteristics and activity will be, at least a little, different even if they are prepared with the same recipe, and the same results will not be obtained even though they have the same code name (in some cases, the same lot) of the same manufacturer. It is common to think that "the preparer's" arm is not good or some conditions were different even with the same manufacturing method. In the other words, it has been thought that there is a "difference" that cannot be detected even if it is made with the same recipe (manufacturing method). It means that we recognize that it exists. Nevertheless, no attempt has been made to detect the "difference", and the current situation is that the conventional measurement is repeated. Perhaps the same is true for powder quality control in companies. So why can't the powder be identified? One of the reasons is that the conventional analysis method is limited to the structure of solid bulk such as crystal form or particle size distribution, and there is no method to measure the surface structure macroscopically. Recently we have developed double-beam photoacoustic spectroscopy (RDB-PAS), which enables the measurements of energy-resolved distribution of electron traps (ERDT), as a novel macroscopic surface analysis method. Using the obtained ERDT/CBB (conduction-band bottom) patterns, it is possible to identify most inorganic solid materials such as metal oxides and carbon nitride. It has been clarified that if ERDT/CBB patterns are the same, those materials are identical and all characteristics, performances, or activities are the same. On the other hand, if there are any differences in characteristics, performance, or slight differences (for the materials giving an ERDT/ CBB patterns), there will always be a difference in the patterns. This enables advanced quality control and material development. The equipment is open to universities, research institutes or companies. Please use it positively.
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