1200 mesh fused silica powder (particle size approx. 8-10 microns) is a segmented product developed for specific high-end needs, and its technical indicators are often customized according to the customer's specific application. This fineness is between 1000 mesh and 1500 mesh, providing material engineers with a "adjustment knob" for finely tuning the performance of composite materials.
Its application scenarios are highly specialized. For example, in a specific model of high-frequency circuit board, a precise dielectric constant value may be required. By adjusting the filling ratio of 1200 mesh fused silica powder, the dielectric constant can be accurately "calibrated" to the target value, like tuning a sound. In a certain advanced chip underfill, the filler is required to have both a very low CTE to provide sufficient stress buffering and ensure that the adhesive has sufficient fluidity to quickly fill the tiny gap between the chip and the substrate. The 1200 mesh fused silica powder product may have found the best balance point between fluidity and CTE reduction effect. Additionally, in the field of special ceramics, such as wave-transparent materials for manufacturing radomes (radar domes), materials are required to have stable and low dielectric loss over a wide temperature and frequency range. As a filler or sintering aid, 1200 mesh fused silica powder can help achieve this goal. Therefore, this product is usually not a standard product but the result of in-depth cooperative development with leading downstream enterprises, reflecting the transformation of the silica powder industry from general material supply to customized solution providers.
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