Patent ID: 7771788

Claim:
A method for the production of spherical ultrafine particles, comprising: vibrating a base nozzle possessing a multiplicity of through holes at a constant rate with power of an ultrasonic vibrator or a piezoelectric component, conveying a slurry liquid substance to said base nozzle, causing said liquid substance to pass through said through holes, and thereby dividing said liquid substance uniformly to give rise to liquid spherical ultrafine particles, drying said liquid spherical ultrafine particles or subsequently drying and firing said liquid spherical ultrafine particles, and producing said spherical ultrafine particles in a form having circularity in a range of 0.9 to 1.0 and a particle diameter in a range of 0.01 to 10 μm, wherein in said base nozzle, said through holes formed in a base of said base nozzle have a hole diameter in a range of 0.05 μm to 50 μm, an aspect ratio of the through holes in a range of 5 to 200 and a hole density of the through holes in a range of 100 to 17,000 pieces/cm 2 .