Fine ceramics require submicron-sized powders. "Silica powder with an average particle size of 3μ."
Introduction to Micro Silica Powder CFP-M3: While conventional ceramics were made by sintering particles of about several tens of micrometers, fine ceramics have achieved the following advancements: 1. The particles of the sintered body have been reduced to several micrometers. 2. Dimensional accuracy has improved. 3. It has become possible to manufacture thin films, fibrous materials, and fine particles. 4. The control of pore diameter in porous bodies has become precise. These characteristics indicate that the technological scope of fine ceramics has broadened. Even with the same material, different forms lead to different functions, and consequently, different applications, which expand the field. One of the significant differences between fine ceramics and traditional ceramics lies in the extent of artificial processing applied to naturally occurring raw materials. Therefore, it is not an exaggeration to say that research on fine ceramics begins with the synthesis of starting raw powder and the study of fine powders. The general characteristics required for raw materials to obtain high-performance fine ceramic sintered bodies are as follows: - They must be fine particles. - There should be no particle agglomeration. - The particle distribution should be narrow (with uniform particle size). - The particle shape should have low anisotropy (spherical). - They must be chemically high purity.
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The necessity of these characteristics varies depending on the sintering method, but it is particularly important for refractory nitrides and carbides. Furthermore, to obtain a high-density sintered body, it is preferable to achieve a high-density green body, which requires good moldability as a necessary condition. The raw powder for fine ceramics manufacturing is synthesized through gas-phase, liquid-phase, and solid-phase reactions to meet the above conditions and is purified as needed. Regarding the micronization of particle size, there are methods for grinding larger particles and methods for synthesizing fine powders from the beginning. For representative fine ceramic powders, the microstructure and defects of their sintered bodies are strongly influenced by the primary particle characteristics such as the composition of the raw powder (purity, types and amounts of impurities), crystal structure, particle size and size distribution, particle shape, and surface morphology (chemical and physical). At the same time, the properties of particle aggregates and the properties of the dispersion system are also important. Therefore, ceramic raw materials are often subjected to grinding treatment as part of the raw material preparation. In the case of fine ceramics, micronization in the submicron range is necessary.
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Fine ceramics in general
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Our company is a manufacturer and seller of ceramic raw materials with a history of over 80 years. In the vicinity of Seto City in Aichi Prefecture, the hometown of pottery, there are large deposits of high-quality silica sand, which is the main raw material for ceramics and glass. Our main business is to wash, crush, remove impurities, and sort the silica sand to meet our customers' needs. Additionally, we have successfully developed processing technology to utilize feldspar from the northeastern part of Aichi Prefecture as a raw material for glass.
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