Preparation process for nano zirconia powder
A nano-zirconia, preparation technology, applied in the direction of zirconia, nanotechnology, nanotechnology, etc., can solve the problem of inapplicable preparation of multi-component oxide powder, affecting the sintering temperature and mechanical properties of the product, and poor component controllability and other problems, to achieve the effect of easy large-scale industrial production, easy control of process parameters, and less agglomeration
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment l
[0033] Take 30 kg of crystalline zirconium oxychloride and dissolve in water so that the concentration of zirconium ions in the aqueous solution is 0.2 mol / liter, add 0.1 mol / liter of solution, and control the doping amount of oxidized zirconia powder to 3 mol. Add a certain amount of alcohol, and add 50% ammonia water (volume ratio) dropwise under vigorous stirring until the pH value of the solution is greater than 9. The hydroxide precipitate was separated by pressure filtration, and the precipitate was washed with distilled water until no chloride ions were detected (silver nitrate test).
[0034] Mix the precipitated hydroxide with 2 times of butanol (weight ratio), and process it with a colloid mill or vigorously stir. Place in a distillation dehydration drying device, dehydrate at 150°C until the powder is completely dry, and calcinate the powder in a high-temperature furnace at 400°C for 4 hours. The specific surface area of the powder was measured by the BET method...
Embodiment 2
[0038] Take 1,000 grams of zircon sand concentrate powder and mix it with 1,400 grams of sodium hydroxide, and decompose it in a corundum vessel at 700°C for 1.5 hours in a high-temperature furnace. The decomposition products were washed with water, dissolved in hydrochloric acid, and silicon, iron, aluminum, sodium, etc. were removed to prepare a 4-liter solution. The concentration of zirconia in the zirconium precursor solution was determined by mandelic acid gravimetric method to be 0.915 mol / liter, and the recovery rate of zirconia in zircon sand was 69.4%. A certain amount of alcohol was added to the zirconium precursor solution, and 50% ammonia water (volume ratio) was added dropwise under vigorous stirring until the pH value of the solution was greater than 9. The hydroxide precipitate was separated by centrifugation, and the precipitate was washed with distilled water until chloride ions were no longer detectable (silver nitrate test).
[0039] The hydroxide precipita...
Embodiment 3
[0043] Hydroxide colloid precipitation was prepared according to the process in Example 2 (the doping amount of the oxide in the zirconia powder was 6 mol%). The hydroxide precipitate was mixed with 2 times ethanol (by weight) and stirred vigorously. Centrifuge, wash again with the same amount of ethanol, and centrifuge again. Place in a distillation drying dehydration device, dehydrate at 100°C until the powder is completely dry, and calcinate the powder in a high-temperature furnace at 500°C for 3 hours. The specific surface area of the powder was measured by the BET method, the particle size, particle size distribution and crystal morphology of the powder were measured by transmission electron microscopy, and the crystal structure of the powder and the average particle size of the primary particles were measured by X-ray powder crystal diffraction.
[0044] The results are shown in Table 3, transmission electron microscopy see figure 2 .
[0045] Table 3 Example 3 ob...
PUM
Property | Measurement | Unit |
---|---|---|
Granularity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com