Development Trends of Ceramic Materials

Nano ceramic materials

Nanometer "(nm) is a measure of scale, with 1nm=0.000000001m, or 10-9 m. Nanomaterials are materials in which at least one phase has a grain size smaller than 100nm. Nanoceramics is a branch of nanomaterials, referring to ceramic materials with an average grain size less than 100nm. Nano ceramics not only maintain excellent properties such as wear resistance and corrosion resistance, but also endow ceramics with high toughness, which will completely change the image of ceramics as "fragile products".

Nanoceramics exhibit high toughness and low-temperature superplastic behavior. In the experiment, a flat square sample was placed between two aluminum foils, and pressure was applied in the direction of the arrow to close the top and bottom. It was found that the shape of the sample underwent sinusoidal bending due to plastic deformation of nano CaF2, which became filamentous through plastic flow to the right. The room temperature superplasticity of nanoceramics makes it possible for ceramics to undergo special processing such as forging, extrusion, pulling, bending, etc. like other materials, without the need for grinding, while retaining their excellent properties such as chemical corrosion resistance, high-temperature and high-pressure resistance. They can directly prepare precision sized parts.

The sintering performance of nano ceramics is very good, and its sintering temperature is several hundred degrees lower than that of ordinary ceramic powders. Many nano ceramics have achieved densification below 1000 ℃ and may continue to decrease. Low temperature sintering can save energy, facilitate environmental purification, and can also be used for the connection of ceramic materials, maintaining consistent physical, chemical, and even mechanical properties of ceramic materials. The micro hardness of nano ceramics is extremely high.

Nano ceramics also have important applications in functional areas. The nonlinear voltammetric characteristics of nano zinc oxide ceramics.

Development Trends of Ceramic Materials

The development trend of ceramic materials:

Gradient material

To adapt to different usage environments at the same time, materials that gradually and continuously distribute from one function to another in different directions within the same material are called gradient functional materials, abbreviated as gradient materials.

Smart material

Materials with both self inspection function (sensor function), information processing function, and command and execution function. It has functions such as self-diagnosis, self-regulation, and self-healing.

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