The capillary and thermal performance of the porous silicon nitride ceramics with nearly spherical pore structure
Source abstract
Abstract
Abstract The capillary and thermal performance of porous Si 3 N 4 ceramics with nearly spherical pore structure has been investigated by altering the addition and diameter of pore‐forming agent polymethyl methacrylate (PMMA) in this work. An exponential model is used to evaluate the liquid uptake capacity of porous Si 3 N 4 ceramics. Porous Si 3 N 4 ceramics fabricated by 5 μm PMMA with 40 wt.% addition possess the lowest capillary time constant and show the best capillary performance owing to the perfect balance between friction resistance and capillary force. The thermal conductivity of porous Si 3 N 4 ceramics is significantly impacted by their porosity. Alexander model with an exponent of .96 is suitable for predicting the thermal conductivity of porous Si 3 N 4 ceramics due to its R ‐squared up to .99. Moreover, with the addition and diameter of PMMA decrease, the flexural strength of porous Si 3 N 4 ceramics increases. These results support the application of porous Si 3 N 4 ceramics in the field of mass and heat transfer.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Thermal properties of materials · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China
Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing China
Funding
National Natural Science Foundation of China · Youth Innovation Promotion Association of the Chinese Academy of Sciences
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