Zirconium oxide ceramic hashigh toughness, high flexural strength, high wear resistance, chemical corrosion resistance, high thermal expansion coefficient, High electrical performanceand otheradvantagesare widely used in the fields of structural ceramics and functional ceramics. The porosity and brittleness of zirconia ceramics are key indicators of ceramic performance. How to accurately and quickly describe these indicators is related to the production effect and efficiency of the product, and the establishment of A set of standard testing procedures will undoubtedly promote the positive and healthy development of the industry.
(Zirconium oxide photovoltaic ceramic parts)
Zirconium oxide The performance of ceramics depends on its microstructure. Due to the characteristics of the production process of zirconia ceramics, there must be certain pores in zirconia ceramics. The pores are divided into open pores and closed pores. Porosity, the size, number and distribution of pores are important contents in the microstructure of zirconia ceramics and are important indicators that determine the performance of zirconia ceramics. The lower the porosity, the smaller the pores, the pores are approximately spherical, and the more uniform the pore distribution is, the better the performance of the zirconia ceramics. The detection of pores is an important testing item in zirconia ceramics. Currently, you can refer to the GB/T 25995-2010 fine ceramic density and apparent porosity test method [5] for zirconia Ceramic porosity was tested.
However, this standard method has certain limitations:
1) Only suitable for ceramic materials with porosity of 0.5%-10%;
2) It can only detect open porosity, not closed porosity;
3) Long sample processing time and long detection cycle;
4) For samples of the same mass, the surface area of the sample increases (fragmentation) and the apparent pores increase. The test results are affected by the surface area of the sample.
