A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD FOR PRODUCING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
There are provided a method for producing an alumina sintered body, and an alumina sintered body. The method comprises: (a) a step of obtaining a molded body by charging a slurry containing Al2O3 powder, MgO powder, MgF2powder, a solvent, a dispersant and a gelling agent into a molding die, reacting the gelling agent to gelate the slurry in the molding die and releasing the moldded body from the die; (b) a step of obtaining a presintered body by drying the molded body, followed by degreasing and calcining; and (c) a step of obtaining a ceramic sintered body by hot-press firing the sintered body at 1150 to 1350 DEG C. In preparing the slurry in the step (a), an Al2O3 powder has a purity of 99.9 mass% or more, relative to a condition that 0.1 to 0.2 pt.mass of MgO powder and 0.13 pt.mass or less of MgF2 powder are used based on 100 pts.mass of the Al2O3 powder.
本发明提供一种氧化铝烧结体的制法以及氧化铝烧结体。该制法包含：(a)获得成形体的工序，将包含Al2O3粉末、MgO粉末、MgF2粉末、溶剂、分散剂以及凝胶化剂的浆料投入成形模具中，在成形模具内使凝胶化剂进行化学反应而使浆料凝胶化，然后脱模，获得成形体，(b)获得预烧体的工序，将该成形体干燥后脱脂，并预烧，获得预烧体，(c)获得陶瓷烧结体的工序，对预烧体在1150～1350℃热压煅烧，获得陶瓷烧结体。在工序(a)中，在调制浆料时，作为Al2O3粉末使用纯度为99.9质量％以上的Al2O3粉末，相对于Al2O3粉末100质量份使用0.1～0.2质量份的MgO粉末、0.13质量份以下的MgF2粉末。
METHOD FOR PRODUCING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
There are provided a method for producing an alumina sintered body, and an alumina sintered body. The method comprises: (a) a step of obtaining a molded body by charging a slurry containing Al2O3 powder, MgO powder, MgF2powder, a solvent, a dispersant and a gelling agent into a molding die, reacting the gelling agent to gelate the slurry in the molding die and releasing the moldded body from the die; (b) a step of obtaining a presintered body by drying the molded body, followed by degreasing and calcining; and (c) a step of obtaining a ceramic sintered body by hot-press firing the sintered body at 1150 to 1350 DEG C. In preparing the slurry in the step (a), an Al2O3 powder has a purity of 99.9 mass% or more, relative to a condition that 0.1 to 0.2 pt.mass of MgO powder and 0.13 pt.mass or less of MgF2 powder are used based on 100 pts.mass of the Al2O3 powder.
本发明提供一种氧化铝烧结体的制法以及氧化铝烧结体。该制法包含：(a)获得成形体的工序，将包含Al2O3粉末、MgO粉末、MgF2粉末、溶剂、分散剂以及凝胶化剂的浆料投入成形模具中，在成形模具内使凝胶化剂进行化学反应而使浆料凝胶化，然后脱模，获得成形体，(b)获得预烧体的工序，将该成形体干燥后脱脂，并预烧，获得预烧体，(c)获得陶瓷烧结体的工序，对预烧体在1150～1350℃热压煅烧，获得陶瓷烧结体。在工序(a)中，在调制浆料时，作为Al2O3粉末使用纯度为99.9质量％以上的Al2O3粉末，相对于Al2O3粉末100质量份使用0.1～0.2质量份的MgO粉末、0.13质量份以下的MgF2粉末。
METHOD FOR PRODUCING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
氧化铝烧结体的制法以及氧化铝烧结体
NOBORI KAZUHIRO (author) / KIMURA TAKUJI (author)
2021-05-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
METHOD FOR PRODUCING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
| European Patent Office | 2016
| European Patent Office | 2020
| European Patent Office | 2021
| European Patent Office | 2020
| European Patent Office | 2019