US 12,392,739 B2
Rare earth oxysulfide cold storage medium
Takagimi Yanagitani, Mitoyo (JP); and Hoshiteru Nozawa, Mitoyo (JP)
Assigned to Konoshima Chemical Co., Ltd., Osaka (JP)
Filed by Konoshima Chemical Co., Ltd., Osaka (JP)
Filed on Jan. 11, 2022, as Appl. No. 17/573,218.
Application 17/573,218 is a division of application No. 16/311,429, abandoned, previously published as PCT/JP2017/024919, filed on Jul. 7, 2017.
Claims priority of application No. 2016-155082 (JP), filed on Aug. 5, 2016.
Prior Publication US 2022/0135419 A1, May 5, 2022
Int. Cl. G01N 23/2055 (2018.01); C01F 17/294 (2020.01); C04B 35/50 (2006.01); C09K 5/14 (2006.01); F25B 9/14 (2006.01)
CPC G01N 23/2055 (2013.01) [C01F 17/294 (2020.01); C04B 35/50 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/446 (2013.01); C04B 2235/9607 (2013.01); C09K 5/14 (2013.01); F25B 9/14 (2013.01); F25B 2309/003 (2013.01); G01N 2223/0566 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method for estimating a ratio of GdAlO3 to Gd2O2S and a ratio of Al2O3 to Gd2O2S by an X-ray intensity, wherein Al2O3 reacts with Gd2O2S to obtain Gd2O2S, Al2O3 and GdAlO3 as a composition, the method comprising:
a first step of obtaining an X-ray intensity of Gd2O2S at a diffraction angle (2θ) of 29.909°;
a second step of obtaining an X-ray intensity of GdAlO3 at a diffraction angle (2θ) of 33.989°;
a third step of obtaining an X-ray intensity of Al2O3 at a diffraction angle (2θ) of 35.152°;
a fourth step of obtaining a first relative X-ray intensity, and the first relative X-ray intensity is a proportion (%) of the X-ray intensity of GdAlO3 obtained by the second step relative to the X-ray intensity of Gd2O2S obtained by the first step;
a fifth step of obtaining a second relative X-ray intensity, and the second relative X-ray intensity is a proportion (%) of the X-ray intensity of Al2O3 obtained by the third step relative to the X-ray intensity of Gd2O2S obtained by the first step,
a sixth step of estimating the ratio of GdAlO3 to Gd2O2S obtained by the first relative X-ray intensity, and
a seventh step of estimating the ratio of Al2O3 to Gd2O2S obtained by the second relative X-ray intensity.