Preparation method of high-density 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 density and low conductivity of composite materials, and achieve high conductivity and wide application range wide range of effects
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[0028] The invention provides a preparation method of a high-density silver-based tungsten-doped vanadium dioxide composite material, and the specific steps are as follows:
[0029] Step 1, Preparation of 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 weigh the 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 1 h to 2 h, and the stirred colloidal solution is placed in a vacuum drying box to obtain 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, then Add 5% of the total mass of carbon black and dry powder process control agent absol...
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, dissolve the two powders in enough distilled water to form a colloidal solution, stir the colloidal solution for 1 hour to make it uniform by mechanical stirring, and then place it in a vacuum drying box to evaporate water to obtain dry powder Then, according to the molar ratio of V:W=4:1, calculate and weigh the carbon black, and place it in the PTFE ball mill tank together with the above-mentioned dry powder. The process control agent absolute ethanol with a total mass of 5% of the powder was ball-milled in a planetary high-energy ball mill at a speed of 380r / min for 6h;
[0039] Place the ball-milled powder in the corundum ark, pound the powder with a spatula, increase the contact area between the powder and argon, and cover the top of the corundum ark with a vent cap to prevent the pow...
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, dissolve the two powders in enough distilled water to form a colloidal solution, stir the colloidal solution for 2 hours to make it uniform by mechanical stirring, and place it in a vacuum drying box to evaporate water to obtain dry powder body. 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 the ball mill steel balls with 35 times the total mass of the powder, add the total mass of the powder. 5% by mass of process control agent absolute ethanol, ball milled in a planetary high-energy ball mill at a speed of 400r / min for 5h;
[0044] Place the ball-milled powder in the corundum ark, pound the powder with a spatula, increase the contact area between the po...
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