3DMIX series ceramic printing materials are 3DCERAM company's high solid content printing paste for industrial ceramic 3D printer CERAMAKER. Based on the existing alumina, zirconia, hydroxyapatite, calcium phosphate and other varieties, 3DCERAM has launched Unique performance non-oxide ceramic-silicon nitride ceramic material (3DMIX-Si3N4).
Characteristics and application of silicon nitride ceramics
Silicon nitride ceramics are a kind of ceramics with high temperature resistance and high strength, which has broad development prospects. Silicon nitride ceramics occupy an important position in high-tech ceramics, with excellent performance (high strength, high hardness, good thermal shock stability, high fatigue toughness, high room temperature bending strength, abrasion resistance, chemical resistance and high High temperature stability, oxidation resistance, etc.); Compared with other ceramics, silicon nitride ceramics have a small specific gravity, low thermal expansion coefficient, good thermal shock resistance, and high fracture toughness. They are an ideal high temperature structural material and high-speed cutting tool ceramics. material.
Due to the excellent properties of silicon nitride ceramics, it has been widely used in many industrial fields.
Machinery industry: turbine blades, mechanical seal rings, high-temperature bearings, high-speed cutting tools, permanent molds, etc .;
Metallurgical industry: for crucible, burner, aluminum electrolytic tank lining and other thermal equipment components;
Chemical industry: corrosion-resistant and wear-resistant parts;
Electronics industry: film capacitors, high-temperature insulators, etc .;
Aerospace: Radar radome, etc .;
Atomic energy industry: supports and spacers in atomic reactors, carriers of fissile material, etc.
3D printing process of silicon nitride ceramics
Silicon nitride ceramic parts printed by 3DCERAM
The ceramic 3D printing technology used by 3DCERAM is a rapid manufacturing technology based on laser curing molding. The printing material is a mixture of photosensitive resin and ceramic powder. UV laser action on the printing material will cause internal cross-linking to solidify and then form the ceramic green body layer by layer. The shaped body is subjected to thermal degreasing and high-temperature sintering to form a high-strength ceramic product with a relative density close to 100%.
Unlike common alumina zirconia ceramics, the gray-black color of silicon nitride ceramics is not conducive to the cross-linking effect during printing, and the sintering process of silicon nitride is more complicated. 3DCERAM has repeatedly explored material formulas, printing equipment parameters, and sintering processes to produce silicon nitride parts with excellent performance. (See Figures 2 and 3)
The advantages of 3D printing technology over traditional processes are no minimum production limit, rapid manufacturing, no mold manufacturing, and complex shape molding. The combination of 3D printing technology and silicon nitride ceramics is beneficial to further expand silicon nitride ceramics in various fields. Application and optimization of structural design of silicon nitride parts.