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A kind of preparation method of nano zirconia hollow sphere
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A hollow sphere, zirconia technology, applied in zirconia, nanotechnology and other directions, can solve the problems of complex preparation process, unfavorable large-scale industrialization, and high cost
Active Publication Date: 2021-11-23
SUZHOU GINET NEW MATERIAL TECH CO LTD
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For details, please refer to the description in paragraphs 6-10 of the description "a preparation method of monodisperse zirconia microspheres, the specific steps of which are...", the applicant has conducted in-depth research on this scheme, and tried to use this method to manufacture micro-nano The sphericity of zirconia is good, but the disadvantage is that this method cannot prepare zirconia powder with a single crystal phase. At the same time, the preparation process is complicated and the cost is high, which is not conducive to large-scale industrialization
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Embodiment 1
[0050] Embodiment one: do not add complexing agent
[0051] Step 1.1, preparation of solution A, mixing and stirring water-soluble zirconium oxychloride, water-soluble yttriumnitrate, and deionized water in a molar ratio of 1:0.05:60 to obtain a homogeneous solution A;
[0052] Step 1.2, the preparation of solution B, mixing and stirring potassiumhydroxide and deionized water according to the molar ratio of 1:55, to obtain a homogeneous solution B;
[0053] Step 1.3, preparation of precursor suspension, drop solution A into solution B at a rate of 10 ml / min, and keep stirring for 2 hours to obtain precursor suspension;
[0054] In step 1.4, a composite mineralizer composed of triethanolamine and potassium acetate with a molar ratio of 1:1 is added to the precursor suspension obtained in step 3, and the amount of the mineralizer added is the same as that of the soluble salt (ie soluble zirconium salt and water-soluble salt). The total amount of active yttrium salt) the mol r...
Embodiment 2
[0058] Embodiment two: add complexing agent
[0059] Step 2.1, preparation of solution A, mixing and stirring water-soluble zirconium oxychloride, water-soluble yttrium chloride, and deionized water in a molar ratio of 1:0.05:60 to obtain a homogeneous solution A;
[0060] Step 2.2, preparation of solution B, mixing and stirring potassiumhydroxide and deionized water according to a molar ratio of 1:40, to obtain a homogeneous solution B;
[0061] Step 2.3, the preparation of solution C, the complexing agent that molar ratio is 3:7 tartaric acid, citric acid composition is added in B solution, and wherein complexing agent addition and potassium hydroxide molar ratio are 1:8;
[0062] Step 2.4, preparation of precursor suspension, drop solution A into solution C at a rate of 9 ml / min, and keep stirring for 2 hours to obtain a precursor suspension;
[0063] In step 2.5, a composite mineralizer composed of triethanolamine and potassium acetate with a molar ratio of 1:1 is added ...
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Abstract
The invention discloses a preparation method of nano zirconia hollow spheres, which adopts the reverse precipitation technology, and first prepares a homogeneous solution by using water-soluble zirconium salt, water-soluble yttriumsalt solution and deionized water, and then the homogeneous solution is slowly Titration is added to an alkaline solvent containing a complexing agent to prepare a precursor suspension. By adding a mineralizer for hydrothermal reaction, nano-zirconia powder materials and nano-zirconia hollow spheres are synthesized at one time, which greatly shortens the production process. The production cycle saves production and manufacturing costs, and the size of the obtained nano-zirconia hollow spheres is micron-scale, and its particle size is uniform. In addition, the nano-zirconia particles that make up the hollow spheres have the characteristics of high purity, high tetragonal phase, and high dispersion.
Description
technical field [0001] The invention relates to the technical field of inorganic non-metallic powder materials, in particular to a method for preparing nano zirconia hollow spheres by hydrothermal reaction. Background technique [0002] Due to its extremely small particle size (1-100nm), nanomaterials have surface effects, small size effects, quantum tunneling effects, and quantum size effects. The super large specific surface area and high surface energy make it significantly improve the optical, electrical, magnetic and mechanical properties of the material. In recent years, with the improvement of nano-powder preparation technology, nano-halogenoxide (ZrO 2 ) have been widely used in many fields. Nano-ZrO 2 It has excellent characteristics such as high melting point, high hardnessphase changetoughening, oxidation resistance, acid and alkali resistance, suitable for catalysis and used as a catalyst carrier, and is an ideal functional structural material. [0003] Th...
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