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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Injection molding method for nano aluminum nitride ceramics
The invention discloses an injection molding method for nano aluminum nitride ceramics and belongs to the field of powder metallurgy. The injection molding method comprises the following steps of batching according to nano aluminum nitride powder and a sintering additive, wherein the addition amount of the sintering additive is 2 to 8 weight percent; adding 5 weight percent of coating agent to be mixed with absolute ethanol to obtain slurry; performing spray drying and granulating to obtain a nano aluminum nitride powder granulation material; placing the granulation material and a binding agent according to the mixture ratio of 50g to 9g-50g to 12g on a roller type mixer for mixing; performing injection molding on the mixture to obtain a green aluminum nitride body; degreasing and sintering the green aluminum nitride body to obtain the aluminum nitride ceramics. According to the injection molding method disclosed by the invention, the nano aluminum nitride powder is granulated in advance, so that the flowability, the apparent density and the tap density of the powder are improved; meanwhile, a coating layer is formed on the surface of the powder, so that the phenomenon that the oxygen content is increased as the powder generates a hydration reaction is prevented; the granulation material and the binding agent are mixed to obtain a feedstock for injection molding of the nano aluminum nitride; the nano aluminum nitride is subjected to injection molding, degreasing and sintering techniques to obtain the aluminum nitride ceramics; the aluminum nitride ceramics have the characteristics of good conformality, low sintering temperature, high strength and the like.
Injection molding method for nano aluminum nitride ceramics
The invention discloses an injection molding method for nano aluminum nitride ceramics and belongs to the field of powder metallurgy. The injection molding method comprises the following steps of batching according to nano aluminum nitride powder and a sintering additive, wherein the addition amount of the sintering additive is 2 to 8 weight percent; adding 5 weight percent of coating agent to be mixed with absolute ethanol to obtain slurry; performing spray drying and granulating to obtain a nano aluminum nitride powder granulation material; placing the granulation material and a binding agent according to the mixture ratio of 50g to 9g-50g to 12g on a roller type mixer for mixing; performing injection molding on the mixture to obtain a green aluminum nitride body; degreasing and sintering the green aluminum nitride body to obtain the aluminum nitride ceramics. According to the injection molding method disclosed by the invention, the nano aluminum nitride powder is granulated in advance, so that the flowability, the apparent density and the tap density of the powder are improved; meanwhile, a coating layer is formed on the surface of the powder, so that the phenomenon that the oxygen content is increased as the powder generates a hydration reaction is prevented; the granulation material and the binding agent are mixed to obtain a feedstock for injection molding of the nano aluminum nitride; the nano aluminum nitride is subjected to injection molding, degreasing and sintering techniques to obtain the aluminum nitride ceramics; the aluminum nitride ceramics have the characteristics of good conformality, low sintering temperature, high strength and the like.
Injection molding method for nano aluminum nitride ceramics
QIN MINGLI (Autor:in) / LU HUIFENG (Autor:in) / HE QING (Autor:in) / LIU CHANG (Autor:in) / CHEN PENGQI (Autor:in) / WU HAOYANG (Autor:in) / QU XUANHUI (Autor:in)
19.08.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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