Method of preparing indium oxide spherical powder
US11479475B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2020 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | Mar 25, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/62
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of preparing an indium oxide spherical powder with a controllable grain shape includes: (1) reacting a sulfuric acid solution, and then adding a nitric acid solution, to react with the metal indium to obtain a mixed solution system containing indium sulfate and indium nitrate; (2) adjusting a concentration of indium ions in the mixed solution system to between 0.45˜0.6M; (3) performing a precipitation reaction of the mixed solution with a precipitant, until a pH value of the solution is between 9˜10, and then having the solution precipitated and aged to obtain an indium hydroxide precursor slurry; (4) using a ceramic membrane to filter and wash the precursor slurry, and ending the washing to obtain a purified precursor sample; (5) drying the precursor sample at 80˜130° C.; and (6) ball-milling the precursor sample, and calcining the precursor at a calcination temperature to obtain the indium oxide powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.