| abstract |
A kind of high-power silicon nitride ceramics heating sheet and its interior hard outer soft production method, including insulated ceramic plates, heating ceramic, welding ceramics and external wire, steps are as follows: one, insulating ceramic materials being pelletized；Two, it is dried after insulating powder ceramic body being made in column grain；Three, pass through drying, granulation, the heating ceramic piece and welding ceramics piece for forming tabletting, degumming, being sintered, being cut into needs；Four, molded good two panels insulating ceramics green body, heating ceramic piece and welding ceramics piece are press-fitted together as one the shape for carrying out hardening degumming, being sintered, being cut into needs.The invention has the advantages that 1, can quickly heat, temperature control is accurate.2, heating ceramic fever is highly uniform, and thermal losses is very low.3, heating ceramic and insulating ceramics, welding ceramics sintering are integrated, and no interface is high-quality.4, welding surface is larger, and welding outlet is very secured. |