2results about How to "Short sintering cycle" patented technology

The invention belongs to the technical field of additive manufacturing, and particularly relates to a 3D printing inorganic binder forming method which comprises the steps that metal powder is prepared; a powder layer is laid on a workbench of printing equipment through the prepared metal powder, an inorganic binder is sprayed to the powder layer according to a printing slicing software pattern, and then the metal blank is obtained through sequential layer-by-layer printing; curing and clearing powder; and sintering. An inorganic binder is adopted for 3D printing forming, no pungent smell is generated in the printing process, and no harm is caused to the body of an operator; green body sintering is free of carbon emission, a metal test block is free of oxidation, and the product sintering quality is good; in the whole sintering process, the toughness of the metal green body can be enhanced, and cracking of the metal green body is inhibited; compared with an organic binder, the inorganic binder has no degreasing process in sintering, so that the sintering period can be shortened.

The invention discloses a carbon ceramic closing resistor for a high-voltage circuit breaker and a preparation method of the carbon ceramic closing resistor, and belongs to the technical field of power elements. The problems of poor resistor compactness, non-uniform performance, insufficient mechanical property and the like caused by high pressing and sintering difficulty, process instability and high and non-uniform resistor porosity of the carbon ceramic resistor are solved. The preparation process of the resistor comprises the following steps: by taking aluminum oxide and quartz as ceramic phases, presintered kaolin, mullite and potassium feldspar as clay phases and carbon black or graphite as conductive phases, pre-coating the ceramic phases with the clay phases, carrying out vacuum calcination on pre-coated powder, mixing the pre-coated powder with the secondarily added clay phases and the conductive phases, carrying out spray granulation, pressing a green body, sintering and spraying. And obtaining the carbon ceramic closing resistor. According to the invention, the kaolin is pre-sintered, and the clay phase is pre-coated with the ceramic phase, so that the subsequent blank pressing uniformity and density are increased, the structural defects of the carbon ceramic resistor are reduced, and in combination with the spark plasma sintering technology, the batch rapid production of the resistor can be realized.