A preparation method of highly dense silver-based tungsten-doped vanadium dioxide composite material
A technology of composite materials and vanadium dioxide, which is applied in the field of preparation of high-density silver-based tungsten-doped vanadium dioxide composite materials, can solve the problems of low electrical conductivity and low density of composite materials, and achieve high electrical conductivity and application wide range of effects
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[0028] The invention provides a method for preparing a high-density silver-based tungsten-doped vanadium dioxide composite material. The specific steps are as follows:
[0029] Step 1, prepare V 0.97 W 0.03 0 2 Powder:
[0030] Step 1.1, calculate and weigh V according to the molar ratio of V:W=97:3 2 o 5 powder and ammonium paratungstate powder;
[0031] Step 1.2, then place the weighed V 2 o 5 The powder and ammonium paratungstate powder are dissolved in distilled water to form a colloidal solution, and then the colloidal solution is stirred for 1h to 2h. The stirred colloidal solution is placed in a vacuum drying oven to obtain a dry powder;
[0032] Step 1.3, calculate and weigh the reducing agent carbon black according to the molar ratio of V:W=4:1, mix the weighed carbon black with the dry powder obtained in step 1.2 and place it in a polytetrafluoroethylene ball mill tank, and then Add carbon black and 5% process control agent absolute ethanol of the total mass ...
Embodiment 1
[0038] Preparation of High Density Ag / V 0.97 W 0.03 0 2 Composite material: Calculate and weigh V according to the molar ratio of V:W=97:3 2 o 5 powder and ammonium paratungstate powder, and the two powders are dissolved in sufficient distilled water to form a colloidal solution, and the colloidal solution is stirred for 1 hour to make it uniform by mechanical stirring, and then placed in a vacuum drying oven to evaporate water to obtain dry powder body, and then calculate and weigh the carbon black according to the molar ratio of V:W=4:1, place it together with the above dry powder in a polytetrafluoroethylene ball mill jar, put in ball mill steel balls 30 times the total mass of the powder, add The process control agent absolute ethanol with 5% of the total powder mass is ball milled at a speed of 380r / min for 6h in a planetary high-energy ball mill;
[0039] Put the ball-milled powder in the corundum ark, loosen the powder with a medicine spoon, increase the contact are...
Embodiment 2
[0043] Preparation of High Density Ag / V 0.97 W 0.03 0 2 For composite materials, calculate and weigh V according to the molar ratio of V:W=97:3 2 o 5 powder and ammonium paratungstate powder, and the two powders are dissolved in sufficient distilled water to form a colloidal solution, and the colloidal solution is stirred for 2 hours to make it uniform by mechanical stirring, and then placed in a vacuum drying oven to evaporate water to obtain dry powder body. Calculate and weigh the carbon black according to the molar ratio of V:W=4:1, place it in a polytetrafluoroethylene ball mill jar together with the above-mentioned dry powder, put in ball mill steel balls 35 times the total mass of the powder, add the total mass of the powder Quality 5% process control agent absolute ethanol, ball milled at a speed of 400r / min for 5h in a planetary high-energy ball mill;
[0044] Put the ball-milled powder in the corundum ark, loosen the powder with a medicine spoon, increase the co...
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