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Effect of Porosity on Thermal Conductivity of Ceramic Materials

Effect of Porosity on Thermal Conductivity of Ceramic Materials

To study the influence of porosity on thermal properties such as thermal conductivity of ceramic materials, it is necessary to prepare a series of samples. Porosity is the only main variable parameter in the product.

This requires: the zirconia and alumina ceramic raw materials used between the samples are the same; the shape, size, orientation and other factors of the pores are roughly the same. It should be admitted that it is quite difficult to control the shape and size of the pores in the sample. Start from an angle, such as:

  • Control the particle size of the added organic matter. Pass the organic matter (naphthalene powder) through two different sieves, and take two sieves to ensure that the particle size of the organic matter only changes within a certain range, so that the size of the pores formed after burning can be roughly controlled.
  • Fully mix the raw materials with organic matter with a vibrating mill to ensure that the porosity of the sample is uniformly distributed.
  • Use the same pressure to form the sample.
  • Baking under the same firing system in the same electric furnace, the highest firing temperature is guaranteed to be the same!


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