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Abstract Self-toughness porous Si3N4 ceramics are prepared by surface modification of Si3N4 particles. The as-fabricated porous Si3N4 ceramics have high number of three-dimensional cage structures that can cause the crack… Click to show full abstract
Abstract Self-toughness porous Si3N4 ceramics are prepared by surface modification of Si3N4 particles. The as-fabricated porous Si3N4 ceramics have high number of three-dimensional cage structures that can cause the crack deflection, absorb the fracture stress to produce microcrack toughening effect and increase the structural reliability of porous Si3N4 ceramics. The flexural strength is 78.0 MPa. The dielectric constant and dielectric loss is 3.47 and 0.001 respectively. This kind of porous Si3N4 ceramics with special three-dimensional cage structures have high mechanical strength, good antioxidation properties and excellent dielectric properties.
Journal Title: Materials Letters
Year Published: 2020
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