Co-current co-precipitation method of CoNiO2 thermistor powders
US11390535B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2020 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Jul 18, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The disclosure relates to a co-current co-precipitation method of CoNiO2 thermistor powders. The method comprises the steps of mixing, stirring, precipitating, aging, suction filtration, washing and drying firstly using nickel nitrate and cobalt nitrate as raw materials to obtain cobalt hydroxide, and then calcining in a tubular furnace at an inert atmosphere to prepare CoNiO2 nano powders. The method has the advantages of simple operation, low cost, short cycle, high yield and no environmental pollution, and further oxidization of the CoNiO2 nano material into NiCo2O4 thermistor powders can be effectively avoided through selection and adjustment of calcination process parameters and inert atmosphere. A high-precision, fast-response and small-volume temperature sensor material can be prepared from CoNiO2 thermistor powders obtained by the method of the disclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.