US 12,187,902 B2
Powder and solid composition
Atsunori Doi, Tsukuba (JP); and Satoshi Shimano, Tsukuba (JP)
Assigned to SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Appl. No. 17/624,957
Filed by Sumitomo Chemical Company, Limited, Tokyo (JP)
PCT Filed Jun. 22, 2020, PCT No. PCT/JP2020/024356
§ 371(c)(1), (2) Date Jan. 5, 2022,
PCT Pub. No. WO2021/010096, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 2019-130484 (JP), filed on Jul. 12, 2019.
Prior Publication US 2022/0267605 A1, Aug. 25, 2022
Int. Cl. C09C 1/36 (2006.01); C01G 23/04 (2006.01); C04B 14/30 (2006.01); C04B 28/26 (2006.01); C09C 3/04 (2006.01)
CPC C09C 1/36 (2013.01) [C01G 23/043 (2013.01); C04B 14/305 (2013.01); C04B 28/26 (2013.01); C09C 3/041 (2013.01); C01P 2002/77 (2013.01); C01P 2004/51 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2006/32 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A titanium-containing metal oxide powder that satisfies the following requirements 1 and 2:
requirement 1: |dA (T)/dT| satisfies 10 ppm/° C. or more at at least one temperature T1 in a range of −200° C. to 1200° C.
where A is (a-axis (shorter axis) lattice constant of a crystal in the powder)/(c-axis (longer axis) lattice constant of the crystal in the powder), and each of the lattice constants is obtained by X-ray diffractometry of the powder;
dA(T)/dT represents differentiation of A(T) by T (temperature), |dA(T)/dT| represents an absolute value of dA(T)/dT, and |dA(T)/dT|=|A(T+50)−A(T)|/50;
requirement 2: a particle diameter D50 at a cumulative frequency of 50%, a particle diameter D10 at a cumulative frequency of 10%, and a particle diameter D90 at a cumulative frequency of 90% in a volume-based cumulative particle diameter distribution curve obtained by a laser diffraction scattering method satisfy the following conditions (I) and (II):
(I) a ratio of D10 to D50 (D10/D50) is 0.05 or more and 0.45 or less, and
(II) D90 is 0.5 μm or more and 70 μm or less.