What Does the Porosity in Refractory Brick Indicators Refer To?
Porosity is an important indicator of refractory bricks. It is one of the reference indicators for thermal shock resistance, mechanical strength, volume stability, thermal conductivity, etc. Therefore, when choosing refractory bricks, we need to pay special attention to porosity. 1. What is Porosity? Terminologically, porosity is also called "apparent porosity," which is the ratio of the volume of open pores in a refractory material to its total volume. Lightweight Insulating Bricks of High Porosity 2. The Impact of Porosity on Refractory Materials Porosity is inversely proportional to thermal shock resistance, mechanical strength, and volume stability. Higher porosity reduces strength, but increased porosity also reduces the thermal conductivity of refractory bricks, making them more suitable for insulation in high-temperature kilns. Regarding thermal shock resistance, higher porosity in refractory bricks can lead to uneven internal thermal expansion at high temperatures, re...