Steatite ceramics (high-frequency porcelain, strengthened porcelain, magnesium nature porcelain), principal constituent Mgo SiO2, luster pure white, acid resisting strong, insulating property high, adsorptive attraction high, is one kind of good installment porcelain materials, serves as in the electronic products the coil skeleton, the mounting panel, the support, each type high frequency insulator, to dial the section switch porcelain axis, the porcelain bushing, the resistance substrate, the case closed, and so on, the steatite ceramics (high frequency porcelain) the heat insulation performance is high, the chemical stability is good, the pressure resistance intensity is high.