Abstract:
It is one of the objects of the present disclosure to provide hexagonal plate-shaped zinc oxide particles having suitable performances derived from the shape thereof, that is, zinc oxide particles having improved ultraviolet shielding ratio at the wavelength of 400 nm or less without impairing the direct transition properties of electronic excitation thereof and having remarkably improved ultraviolet shielding ratio for UV-B radiation and UV-A radiation.A zinc oxide particle containing a solid solution of a Ti element and/or a Fe element and a Zn element in at least a portion thereof, and having a hexagonal plate shape.
Abstract:
It is one of the objects of the present disclosure to provide zinc oxide particles having improved ultraviolet shielding performance especially in the region of UV-A radiation at 400 to 320 nm.A cerium oxide-coated zinc oxide particle comprising a matrix raw zinc oxide particle and a cerium oxide layer formed on the surface of the matrix particle, wherein a cerium oxide amount is 5 to 30 wt % relative to 100 wt % of the zinc oxide, a particle diameter of the cerium oxide-coated zinc oxide particles is 0.01 μm or more, and a specific surface area of the cerium oxide-coated zinc oxide particle is 5.0 m2/g or more.
Abstract:
It is one of objects of the present disclosure to provide hexagonal plate-shaped zinc oxide particles which can be used suitably for a cosmetic, a filler, a resin composition, an infrared radiation reflective material, and a coating composition, and a method for producing the same.Hexagonal plate-shaped zinc oxide particles having a primary particle diameter of 1.1 μm or more and a D90/D10 of 3.0 or less in particle size distribution.
Abstract:
The invention provides a low alpha dose barium sulfate particle having a silica content of 0.6% by weight or less and an alpha dose of 0.07 cph/cm2 or less.
Abstract:
The invention provides a low alpha dose barium sulfate particle having a silica content of 0.6% by weight or less, an average particle diameter of 1 μm or less, a sulfur content of 10 ppm or less, and an alpha dose of 0.07 cph/cm2 or less.
Abstract:
It is one of the objects of the present disclosure to provide hexagonal prism-shaped zinc oxide particles having improved ultraviolet shielding ratio at the wavelength of 400 nm or less without impairing the direct transition properties of electronic excitation thereof and having remarkably improved ultraviolet shielding ratio for UV-B radiation and UV-A radiation.A zinc oxide particle containing a solid solution of a Ti element and/or a Fe element and a Zn element in at least a portion thereof, and having a hexagonal prism shape.
Abstract:
Disclosed are a method of producing fine particulate alkali metal niobate in a liquid phase system, wherein the size and shape of the particulate alkali metal niobate can be controlled; and fine particulate alkali metal niobate having a controlled shape and size. One of specifically disclosed is a method of producing a substantially rectangular cuboid particulate alkali metal niobate represented by MNbO3 (1), wherein M represents one element selected from alkaline metals, including specific four steps. Another one of specifically disclosed is particulate alkali metal niobate represented by the formula (1) having a substantially rectangular cuboid shape, wherein the substantially rectangular cuboid shape has a longest side and a shortest side, the length of the longest side represented by an index Lmax is 0.10 to 25 μm, and the length of the shortest side represented by an index Lmin is 0.050 to 15 μm.
Abstract:
Disclosed are a method of producing fine particulate alkali metal niobate in a liquid phase system, wherein the size and shape of particles of the fine particulate alkali metal niobate can be controlled; and fine particulate alkali metal niobate having a controlled shape and size. Specifically disclosed are a method of producing particulate sodium-potassium niobate represented by the formula (1): NaxK(1-x)NbO3 (1), the method including four specific steps, wherein a high-concentration alkaline solution containing Na+ ion and K+ ion is used as an alkaline solution; and particulate sodium-potassium niobate having a controlled shape and size.