Pengaruh Dolomite Terhadap Sifat Fisika dan Kimia Keramik

Abstract

The ceramic industry material has experienced rapid development. This development includes advancements in structure, composition, and physical and mechanical properties. One effort to enhance mechanical strength is by mixing ceramic materials with other materials available in the market. The quality of ceramics is a crucial factor to consider, one of which is by examining the physical and chemical properties of ceramics. Dolomite is one of the materials that significantly impacts ceramic formation; therefore, experiments need to be conducted to determine the extent of dolomite's influence on ceramic quality. Tests are carried out to ascertain the effect of dolomite amount on the characterization of ceramics. The characterization of ceramic samples with added dolomite in various amounts includes chemical and physical properties. The chemical properties of ceramic materials are determined through chemical analysis using X-Ray Fluorescence to identify the elements present in the ceramic materials. Physical properties can be determined by measuring shrinkage, compressive strength, and bending. The obtained chemical and physical properties can be used to determine the appropriate composition of dolomite as a ceramic material to achieve good ceramic quality. The correct material composition will produce ceramic products that are harder and stronger, making them less prone to breaking when heated. The chemical analysis results of dolomite using X-Ray Fluorescence show that the main elements are CaO and MgO with mass percentages of 69.41% and 29.37%, respectively. The more dolomite added to the ceramic raw material, the higher the content of CaO and MgO. The physical properties of ceramics with the addition of 2.50% dolomite in the ceramic material result in a dry shrinkage of 3.37%, firing shrinkage of 8.87%, compressive strength of 74.21 MPa, and bending of 22.76%.