Self-glazing dielectric ceramic bodies fabricated from Egyptian rhyodacite and kaolin

Rhyodacite is a good source of major oxides, as these are contained in its essential mineral components, such as quartz, oligoclase, and albite. Thus, using natural rhyodacite and kaolin, dielectric self-glazing ceramic materials were prepared that exhibit excellent dielectric properties. The obtained materials were sintered at different temperatures to determine their vitrification ranges and optimal sintering temperatures. As well as determining the composition and microstructure of the phases obtained, their physical, thermal, and mechanical properties were also measured. The prepared materials exhibit low dissipation factors and stable dielectric constants at high frequencies, making them promising dielectric materials for use in high power circuits that operate at high speed.