Quartz crucibles are primarily composed of silicon dioxide, which does not react with other acids except hydrofluoric acid, but readily reacts with caustic alkalis and alkali metal carbonates.

Quartz crucibles exhibit excellent thermal stability and can be directly placed on a flame for heating.

Quartz crucibles, like glassware, are fragile and require extra caution during use.

Quartz crucibles can use potassium hydrogen sulfate (sodium), sodium thiosulfate (dried at 212°C) as fluxes, with the melting temperature not exceeding 800°C.