Preparation method of deposited, ventilated and reduced nanometer-level silver powder
A nano-silver powder and nano-technology, applied in the field of industrial scale production of nano-scale silver powder, can solve the difficulty of separation of mother liquor and silver particles and repeated cleaning and filtration, long time, generally 1~2 hours, sometimes up to 4 hours, not large Large-scale investment in industrial production and other issues to achieve the effects of easy continuous automatic control, saving precipitation and reduction time, and high production efficiency
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Embodiment 1
[0034] Embodiment 1: When preparing 1kg nano Ag powder, it should be completed according to the following steps.
[0035] 1. Weigh 1.574kg AgNO 3 Powder, by AgNO 3 :H 2 O=85:1000 was added to 18.54Kg distilled water at a mass ratio of 0.5mol / L, heated to 80°C to fully dissolve, and prepared into 20.11 Kg AgNO 3 aqueous solution;
[0036] 2. Press PVA: H 2O =2:100 (mass ratio), add 0.197Kg PVA to 9.85Kg distilled water, heat and stir at 100°C until completely dissolved, that is, prepare 10.06Kg PVA release agent solution for use.
[0037] 3. Prepare (silver nitrate-PVA) binary mixture.
[0038] In the above 20.11KgAgNO 3 In aqueous solution, according to PVA solution: AgNO 3 Solution=1:2 (mass ratio) Add 10.05Kg of PVA aqueous solution to prepare 30.16Kg (silver nitrate-PVA) binary mixture.
[0039] 4. Preparation of silver nitrate-NaOH-PVA ternary mixed solution
[0040] By NaOH: AgNO 3 =1:2.5 mass ratio, 0.742Kg NaOH was made into 19.3kg solution at a concentration...
Embodiment 2
[0056] Embodiment 2: when preparing 500g nanometer Ag powder, should complete according to the following steps
[0057] 1. Weigh 0.787kg AgNO 3 powder, the AgNO 3 Press AgNO 3 :H 2 Add O=85:1000 mass ratio to 9.265Kg distilled water, heat to 60°C, and stir vigorously to prepare 10.05Kg AgNO 3 aqueous solution;
[0058] 2. Prepare PVA solution, press PVA: H 2 O =2:100 (mass ratio) Weigh 0.099Kg of PVA powder and 4.925Kg of distilled water, heat and stir at 100°C until completely dissolved, that is, prepare 5.024Kg of PVA release agent solution for later use.
[0059] 3. Preparation of (silver nitrate-PVA) binary mixture
[0060] A total of 15.074Kg of the above two solutions of 1 and 2 were mixed to make a binary mixed solution;
[0061] 4. Preparation of silver nitrate-NaOH-PVA ternary mixed solution
[0062] Slowly pour 0.371kg NaOH into 9.65kg solution at (1mol / L) concentration into the above-mentioned (silver nitrate-PVA) binary mixture.
[0063] 5. Microwave act...
Embodiment 3
[0076] Embodiment 3: when preparing 500g nanometer Ag powder, should complete according to the following steps
[0077] 1. Weigh 0.787kg AgNO 3 powder, the AgNO 3 Press AgNO 3 :H 2 O=85:1000 mass ratio was added to 9.265Kg distilled water, heated to 70°C, and vigorously stirred to prepare 10.05Kg AgNO 3 aqueous solution;
[0078] 2. Prepare PVA solution, press PVA: H 2 O =2:100 (mass ratio) Weigh 0.099Kg of PVA powder and 4.925Kg of distilled water, heat and stir at 95°C until completely dissolved, that is, prepare 5.024Kg of PVA release agent solution for later use.
[0079] 3. Preparation of (silver nitrate-PVA) binary mixture
[0080] A total of 15.074Kg of the above two solutions of 1 and 2 were mixed to make a binary mixed solution;
[0081] 4. Preparation of silver nitrate-NaOH-PVA ternary mixed solution
[0082] Slowly pour 0.371kg NaOH into 9.65kg solution at (1mol / L) concentration into the above-mentioned (silver nitrate-PVA) binary mixture.
[0083] 5. Mic...
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