Method for preparing nano-Cu uniformly coated Zn4Sb3 powder
A nano and powder technology, applied in liquid chemical plating, coating, metal material coating process and other directions, can solve the problem of uniform distribution of nano second phase
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Embodiment 1
[0046] A Zn uniformly coated with nano-Cu 4 Sb 3 The preparation method of powder, it comprises the steps:
[0047] 1) Preparation of single-phase β-Zn by melting method 4 Sb 3 Powder:
[0048] (1) According to the nominal composition, it is Zn 4.1 Sb 3 Calculation and synthesis of 60g single-phase β-Zn 4 Sb 3 Compounds require high-purity metal Zn powder and high-purity metal Sb powder to be 25.3992g and 34.6364g respectively. Weigh the two raw materials accurately and mix them evenly. -1 In the vacuum quartz tube of MPa, the purity of the high-purity metal Zn powder is more than or equal to 99.999% (mass), and the purity of the high-purity metal Sb powder is more than or equal to 99.99% (mass);
[0049] (2) The above-mentioned vacuum quartz tube is placed in a melting furnace, raised from room temperature to 1023K at a heating rate of 1K / min, melted in vacuum for 2 hours, and cooled to room temperature with the furnace to obtain the required single-phase β-Zn 4 Sb ...
Embodiment 2
[0063] A Zn uniformly coated with nano-Cu 4 Sb 3 The preparation method of powder, it comprises the steps:
[0064] 1) Preparation of single-phase β-Zn by melting method 4 Sb 3 Powder: with embodiment 1.
[0065] 2) Nano-Cu uniformly coated Zn 4 Sb 3 Powder preparation:
[0066] (1) Weigh single-phase β-Zn 4 Sb 3 Powder 10g, ie m 1 =10g, according to single-phase β-Zn 4 Sb 3 The ratio of the powder to the acidic surfactant of pH=5 is 10g: 100ml, and 100ml of the acidic surfactant is weighed, and the single-phase β-Zn 4 Sb 3 The powder is added to the acidic surfactant with pH=5, under the action of magnetic stirring, the single-phase β-Zn 4 Sb 3 The powder was treated with an acidic surfactant for 10 minutes to obtain a suspension; then the molar concentration was 1×10 -3 mol / L acid-base regulator adjusts the pH value of the suspension to 8 to obtain activated β-Zn 4 Sb 3 powder suspension; the acidic surfactant is an aqueous solution of nitric acid, its pH=5;...
Embodiment 3
[0077] A Zn uniformly coated with nano-Cu 4 Sb 3 The preparation method of powder, it comprises the steps:
[0078] 1) Preparation of single-phase β-Zn by melting method 4 Sb 3 Powder: with embodiment 1.
[0079] 2) Nano-Cu uniformly coated Zn 4 Sb 3 Powder preparation:
[0080] (1) Weigh single-phase β-Zn 4 Sb 3 Powder 10g, according to single phase β-Zn 4 Sb 3 The ratio of the powder to the acidic surfactant of pH=5 is 10g: 100ml, and 100ml of the acidic surfactant is weighed, and the single-phase β-Zn 4 Sb 3 The powder is added to the acidic surfactant with pH=5, under the action of magnetic stirring, the single-phase β-Zn 4 Sb 3 The powder was treated with an acidic surfactant for 15 minutes to obtain a suspension; then the molar concentration was 1×10 -3 mol / L acid-base regulator adjusts the pH value of the suspension to 8 to obtain activated β-Zn 4 Sb 3 powder suspension; the acidic surface active agent is an aqueous solution of hydrochloric acid, its pH=...
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