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US 11,433,149 B2Granted
Microsphere and preparation method thereof
AssigneePlatinum Optics Technology Inc.
InventorsYu-Yu Tsai, Fu-Yu Chang, Chien-Liang Liu
Life of this patent
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Abstract
Provided is a microsphere including a glass sphere core. The glass sphere core includes a first nuclide, a second nuclide and a diffusion region extending inwardly from an outer surface of the glass sphere core, with the second nuclide distributed in the diffusion region. The first nuclide and the second nuclide become radioactive after being activated by neutrons to produce radiations including β-rays or γ-rays, or simultaneously β-rays and γ-rays. A preparation method of a microsphere is also provided.
Claims12
A microsphere, comprising:
- a glass sphere core comprising a first nuclide, a second nuclide, and a diffusion region extending inwardly from an outer surface of the glass sphere core, wherein the size of the diffusion region is less than the size of the glass sphere core,
- wherein the first nuclide is distributed throughout the glass sphere core, the second nuclide is only distributed in the diffusion region and not present out of the diffusion region, and the first nuclide and the second nuclide both are capable of being radioactive to produce radiations comprising γ-rays or β-rays, or simultaneously γ-rays and β-rays.
A method for preparing a microsphere, comprising:
- heating glass powder comprising a first nuclide to spheroidize and form a glass sphere core;
- and
- reacting the glass sphere core with a cooling source, wherein the cooling source is a saturated liquid containing a second nuclide liquid phase component with a second nuclide diffused into the glass sphere core by being thermally activated to form a diffusion region extending inwardly from an outer surface of the glass sphere core,
- wherein the first nuclide and the second nuclide are capable of being radioactive to produce radiations comprising β-rays or γ-rays, or simultaneously β-rays and γ-rays.
1 more element
Dependencies are inferred from the claim text.