Patent ID: 11884553
Assignee: UBE MATERIAL INDUSTRIES, LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 9:
10. A method for producing the magnesium oxide powder according to claim 1, the method comprising:
a step of mixing magnesium hydroxide particles and/or magnesium oxide particles, and a grain boundary forming component in a presence of water and then drying a mixture to prepare a raw material mixture which contains the magnesium hydroxide particles and/or the magnesium oxide particles, the grain boundary forming component, and impurities and in which an amount of the magnesium hydroxide particles and/or the magnesium oxide particles is 94% by mass or more in terms of magnesium oxide and an amount of the grain boundary forming component is 0.8% by mass or more in terms of oxide;
a step of sintering the raw material mixture to obtain a sintered material; and
a step of classifying the sintered material.