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Provided is a molybdenum trioxide powder containing an aggregate of primary particles containing a crystal structure of molybdenum trioxide, the crystal structure containing α crystals with an average crystallite size of 50 nm or less, a median diameter D50 of the primary particles being 2,000 nm or less determined by dynamic light scattering.

Titel:	MOLYBDENUM TRIOXIDE POWDER AND PRODUCTION METHOD THEREFOR
Link:	View record in USPTO Patent Applications (Volltext)
Veröffentlichung:	2024
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20240059580 Publication Date: February 22, 2024 Appl. No: 18/282040 Application Filed: March 22, 2022 Assignees: DIC Corporation (Tokyo, JP) Claim: 1. A molybdenum trioxide powder comprising an aggregate of primary particles containing α crystal structure of molybdenum trioxide, the crystal structure containing α crystals with an average crystallite size of 50 nm or less, and a median diameter D50 of the primary particles being 2,000 nm or less determined by dynamic light scattering. Claim: 2. The molybdenum trioxide powder according to claim 1, wherein a content of MoO3 is 99.5% by mass or more with respect to a total weight of the molybdenum trioxide powder measured by X-ray fluorescence (XRF). Claim: 3. The molybdenum trioxide powder according to claim 1, which has a specific surface area of 10 m2/g or more measured by a BET method. Claim: 4. The molybdenum trioxide powder according to claim 1, wherein the crystal structure further contains R crystals with an average crystallite size of 50 nm or less. Claim: 5. The molybdenum trioxide powder according to claim 4, wherein a ratio (β (011)/α (021)) of intensity of a peak attributed to the plane (011) of a R crystal of MoO3 to intensity of a peak attributed to the plane (021) of the α crystal of MoO3 is 0.1 or more in a profile obtained by powder X-ray diffraction (XRD) using Cu-Kα rays as an X-ray source. Claim: 6. The molybdenum trioxide powder according to claim 5, wherein the ratio (β (011)/α (021)) of the intensity of the peak attributed to the plane (011) of the R crystal of MoO3 to the intensity of the peak attributed to the plane (021) of the α crystal of MoO3 is 10.0 or less in a profile obtained by the powder X-ray diffraction (XRD) using the Cu-Kα rays as the X-ray source. Claim: 7. The molybdenum trioxide powder according to claim 1, wherein the primary particles have a ribbon shape or a sheet shape. Claim: 8. A method for producing the molybdenum trioxide powder according to claim 1, the method comprising: vaporizing a molybdenum oxide precursor compound to form molybdenum trioxide vapor; and cooling the molybdenum trioxide vapor. Claim: 9. The method for producing the molybdenum trioxide powder according to claim 8, further comprising calcining a raw material mixture containing a molybdenum oxide precursor compound and a metal compound other than the molybdenum oxide precursor compound to vaporize the molybdenum oxide precursor compound and form molybdenum trioxide vapor, wherein a ratio of the metal compound to 100% by mass of the raw material mixture is 95% by mass or less in terms of oxide. Current International Class: 01

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MOLYBDENUM TRIOXIDE POWDER AND PRODUCTION METHOD THEREFOR