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METHOD FOR MANUFACTURING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
The present invention relates to a method for manufacturing an alumina sintered body comprising the following steps: (a) obtaining a molded body by injecting slurry including Al_2O_3 powder, MgO powder, MgF_2 powder, a solvent, a dispersing agent, and a gelling agent, making the gelling agent chemically react in a mold to gelate the slurry, and releasing the resultant product; (b) obtaining a calcined body by degreasing and calcinating after drying the molded body; and (c) obtaining a ceramic sintered body by hot press plasticizing the calcined body at 1150-1350 deg. C. The preparation of the slurry in the step (a), Al_2O_3 powder having a purity of 99.9 wt% or higher is used; and 0.1-0.2 parts by weight of MgO powder and less than or equal to 0.13 parts by weight of MgF_2 powder are used with respect to 100 parts by weight of Al_2O_3 powder. The method for manufacturing an alumina sintered body manufactures alumina sintered bodies having high volume resistivity and withstanding voltage at high temperatures, thereby being able to manufacture alumina sintered bodies having a uniform desorption response for each lot.
본 발명은 알루미나 소결체의 제법으로서, (a) AlO분말, MgO 분말, MgF분말, 용매, 분산제 및 겔화제를 포함하는 슬러리를 성형틀에 투입하고, 상기 성형틀 내에서 상기 겔화제를 화학 반응시켜 상기 슬러리를 겔화시킨 후 이형함으로써, 성형체를 얻는 공정과, (b) 상기 성형체를 건조시킨 후 탈지하고 또한 하소함으로써, 하소체를 얻는 공정과, (c) 상기 하소체를 1150℃∼1350℃에서 핫 프레스 소성함으로써, 세라믹 소결체를 얻는 공정을 포함한다. 상기 공정 (a)에서는, 상기 슬러리를 조제하는 데 있어서, AlO분말로서 순도가 99.9 질량％ 이상인 것을 사용하고, AlO분말 100 질량부에 대하여 MgO 분말을 0.1 질량부∼0.2 질량부, MgF분말을 0.13 질량부 이하 사용한다.
METHOD FOR MANUFACTURING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
The present invention relates to a method for manufacturing an alumina sintered body comprising the following steps: (a) obtaining a molded body by injecting slurry including Al_2O_3 powder, MgO powder, MgF_2 powder, a solvent, a dispersing agent, and a gelling agent, making the gelling agent chemically react in a mold to gelate the slurry, and releasing the resultant product; (b) obtaining a calcined body by degreasing and calcinating after drying the molded body; and (c) obtaining a ceramic sintered body by hot press plasticizing the calcined body at 1150-1350 deg. C. The preparation of the slurry in the step (a), Al_2O_3 powder having a purity of 99.9 wt% or higher is used; and 0.1-0.2 parts by weight of MgO powder and less than or equal to 0.13 parts by weight of MgF_2 powder are used with respect to 100 parts by weight of Al_2O_3 powder. The method for manufacturing an alumina sintered body manufactures alumina sintered bodies having high volume resistivity and withstanding voltage at high temperatures, thereby being able to manufacture alumina sintered bodies having a uniform desorption response for each lot.
본 발명은 알루미나 소결체의 제법으로서, (a) AlO분말, MgO 분말, MgF분말, 용매, 분산제 및 겔화제를 포함하는 슬러리를 성형틀에 투입하고, 상기 성형틀 내에서 상기 겔화제를 화학 반응시켜 상기 슬러리를 겔화시킨 후 이형함으로써, 성형체를 얻는 공정과, (b) 상기 성형체를 건조시킨 후 탈지하고 또한 하소함으로써, 하소체를 얻는 공정과, (c) 상기 하소체를 1150℃∼1350℃에서 핫 프레스 소성함으로써, 세라믹 소결체를 얻는 공정을 포함한다. 상기 공정 (a)에서는, 상기 슬러리를 조제하는 데 있어서, AlO분말로서 순도가 99.9 질량％ 이상인 것을 사용하고, AlO분말 100 질량부에 대하여 MgO 분말을 0.1 질량부∼0.2 질량부, MgF분말을 0.13 질량부 이하 사용한다.
METHOD FOR MANUFACTURING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
알루미나 소결체의 제법 및 알루미나 소결체
NOBORI KAZUHIRO (author) / KIMURA TAKUJI (author)
2016-10-06
Patent
Electronic Resource
Korean
IPC:
C04B
Kalk
,
LIME
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