The Effect of Manganese-Containing Pigment on the Strength of Ceramic Bricks

The paper presents the results of investigation concerning using a high-temperature pigment based on synthetic tri-manganese tetra-oxide (Mn3O4) in the production of volume-colored bricks using red-burning clay. It is established that the introduction of a pigment in the amount of 2–4% results in a rich dark brown brick. At the same time, the intensity of the color increases with an increase in the pigment concentration from 2 to 4% and a brick firing temperature from 800 to 950°C. It has been established that with the introduction of pigment the strength of the obtained brick samples decreases, as well as the frost resistance.