US 12,459,830 B2
Plate-like alumina particle and method for manufacturing plate-like alumina particle
Shaowei Yang, Shandong (CN); Tomoki Dohi, Chiba (JP); Hironobu Oki, Chiba (JP); Jianjun Yuan, Chiba (JP); Cheng Liu, Shandong (CN); Meng Li, Shandong (CN); and Wei Zhao, Shandong (CN)
Assigned to DIC Corporation, Tokyo (JP)
Appl. No. 17/766,716
Filed by DIC Corporation, Tokyo (JP)
PCT Filed Oct. 9, 2019, PCT No. PCT/CN2019/110122
§ 371(c)(1), (2) Date Apr. 5, 2022,
PCT Pub. No. WO2021/068125, PCT Pub. Date Apr. 15, 2021.
Prior Publication US 2023/0096825 A1, Mar. 30, 2023
Int. Cl. C01F 7/30 (2022.01); C01F 7/442 (2022.01); C08K 7/24 (2006.01); C08K 3/22 (2006.01)
CPC C01F 7/30 (2013.01) [C01F 7/442 (2013.01); C08K 7/24 (2013.01); C01P 2002/74 (2013.01); C01P 2004/61 (2013.01); C08K 2003/2227 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for manufacturing a plate-like alumina particle, the method comprising:
mixing an aluminum compound containing an aluminum element of 50% by mass or more in a form of Al2O3, a molybdenum compound containing a molybdenum element of 7% by mass or more and 40% by mass or less in a form of MoO3, and a raw material germanium compound of 0.4% by mass or more and less than 1.5% by mass in a form of GeO2 to produce a mixture; and
firing the mixture,
wherein each of the 50% by mass, the 7% by mass, the 40% by mass, the 0.4% by mass, and 1.5% by mass is a mass percentage with respect to a total amount of raw materials in forms of oxides which is assumed to be 100% by mass,
for the plate-like alumina particle, a ratio I(006)/I(113) of a peak intensity I(006) to a peak intensity I(113) is 0.2 or more,
the peak intensity I(006) is an intensity of a peak at 2θ=41.6±0.3 degrees which corresponds to a (006)-face diffraction peak obtained by X-ray diffraction measurement using a Cu-Kα ray, and
the peak intensity I(113) is an intensity of a peak at 2θ=43.3±0.3 degrees which corresponds to a (113)-face diffraction peak obtained by X-ray diffraction measurement using a Cu-Kα ray.