Spherical magnesium oxide and production method therefor

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United States of America Patent

PATENT NO 11180688
SERIAL NO

16481445

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Abstract

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Provided are: a spherical magnesium oxide having not only high sphericity but also smooth surface and having excellent moisture resistance and excellent filling properties, and a method producing the same. In the present invention, by controlling the boron and iron contents of the calcined magnesium oxide to be in the respective predetermined ranges, there is provided a spherical magnesium oxide having a volume-based cumulative 50% particle diameter (D50), as measured by a laser diffraction/scattering particle size distribution measurement, in the range of from 3 to 200 μm, which is the range for a relatively large particle diameter, and a high sphericity of 1.00 to 1.20, as measured from viewing a SEM photomicrograph, as well as smooth surface, and having excellent moisture resistance and excellent filling properties. A predetermined spherical magnesium oxide is provided by virtue of the synergies obtained from the boron content of 300 to 2,000 ppm and the iron content of 100 to 1,500 ppm.

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Patent Owner(s)

Patent OwnerAddress
TATEHO CHEMICAL INDUSTRIES CO LTDAKO-SHI HYOGO 678-0239

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chikazawa, Tomoaki Ako, JP 7 3
Konishi, Takeshi Ako, JP 20 382
Morita, Yuki Ako, JP 28 70
Osaki, Yoshihisa Ako, JP 6 2
Saito, Akinori Ako, JP 55 445
Takegaki, Mareshi Ako, JP 2 5

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