US 10,766,783 B2 · Magnesium oxide-containing spinel powder and method for producing same

Abstract

Provided is a magnesium oxide-containing spinel powder capable of producing a ceramic sintered body having high strength and excellent strength stability. In the magnesium oxide-containing spinel powder, a 50% particle diameter (D50) is 0.30 to 10.00 μm, a ratio (D90-D50)/(D50-D10) of a difference between a 90% particle diameter (D90) and the 50% particle diameter (D50) and a difference between the 50% particle diameter (D50) and a 10% particle diameter (D10) is 1.0 to 5.0, and a composition ratio of Mg and Al in terms of an oxide equivalent content is 50 to 90% by weight of MgO and 10 to 50% by weight of Al2O3.

Claims5

Dependent claims

A magnesium oxide-comprising oxide containing spinel powder, which has a volume-based cumulative 50% particle diameter (D50) in a range of from 0.30 to 10.00 μm,

a ratio (D90-D50)/(D50-D10) of a difference between a volume-based cumulative 90% particle diameter (D90) and D50 to a difference between D50 and a volume-based cumulative 10% particle diameter (D10) in a range of from 1.0 to 5.0, and
a composition ratio of Mg and Al, in terms of an oxide equivalent content, of 50 to 90% by weight of MgO and 10 to 50% by weight of Al2O3, based on 100% by weight of both of MgO and Al2O3
wherein D50, D90, and D10 are measured by a laser diffraction scattering particle size distribution measurement.

Dependencies are inferred from the claim text.

Facts

Application

16/335,489Filed 26 Sep 2017

Priority

JP 2016-18665626 Sep 2016

Published

US 2019/0300377 A13 Oct 2019

Granted

8 Sep 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification29 codes

C01F 7/162
Preparation of alkaline-earth metal aluminates or magnesium aluminates; Aluminium oxide or hydroxide therefrom: magnesium aluminates
C01F 5/08
By thermal decomposition of magnesium compounds: by calcining magnesium hydroxide
C01F 7/16
Aluminium oxide; Aluminium hydroxide; Aluminates: preparation of alkaline-earth metal aluminates or magnesium aluminates; Aluminium oxide or…
C04B 35/443
Based on aluminates: magnesium aluminate spinel

Magnesium oxide-containing spinel powder and method for producing same

Life of this patent

Magnesium oxide-containing spinel powder and method for producing same

Life of this patent

Abstract

Claims5