Rapid preparation method of monoclinic phase VO2 metal-insulator phase transformation ceramic material
A ceramic material, VO2 technology, applied in the field of rapid preparation of monoclinic VO2 metal-insulator phase change ceramics, can solve the problems of insufficient physical performance, harsh raw material requirements, cumbersome synthesis methods, etc., to shorten the preparation time and reduce the cost of raw materials , The effect of complete hydrothermal reaction
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Embodiment 1
[0026] 1. Using Citric Acid-V 2 o 5 Preparation of Monoclinic VO by Hydrothermal Reaction 2 Powder:
[0027] (1) Measure 0.00375mol of citric acid into a 50mL beaker, add 20mL of deionized water, dissolve under magnetic stirring to form a transparent solution, and then weigh 0.0025molV 2 o 5 Add the solid powder to the above citric acid solution, and magnetically stir together for about 30 minutes to form a uniform yellow solution. The concentration of citric acid-vanadium pentoxide in the mixed solution is 0.025±5% g / mL;
[0028] (2) Pour the above yellow solution into a 50mL stainless steel hydrothermal synthesis reaction kettle, and measure 10mL of deionized water several times to rinse the residual drug in step (1), and add it to the reaction kettle together, and the final reaction solution is about 50mL , then put the reactor into an oven, heat to 180°C, and continue the reaction for 5 hours;
[0029] (3) After the above reaction time is over, the solid-liquid separa...
Embodiment 2
[0036] 1. Using Citric Acid-V 2 o 5 Preparation of Monoclinic VO by Hydrothermal Reaction 2 Powder:
[0037] (1) Measure 0.00625mol of citric acid into a 50mL beaker, add 20mL of deionized water, dissolve under magnetic stirring to form a transparent solution, and then weigh 0.0025molV 2 o 5Add the solid powder to the above citric acid solution, and magnetically stir together for about 30 minutes to form a uniform yellow solution. The concentration of citric acid-vanadium pentoxide in the mixed solution is 0.025±5% g / mL;
[0038] (2) Pour the above yellow solution into a 50mL stainless steel hydrothermal synthesis reaction kettle, and measure 10mL of deionized water several times to rinse the residual drug in step (1), and add it to the reaction kettle together, and the final reaction solution is about 50mL , and then put the reactor into an oven, heat it to 170°C, and continue the reaction for 10 hours;
[0039] (3) After the above reaction time is over, the solid-liquid...
Embodiment 3
[0046] 1. Using Citric Acid-V 2 o 5 Preparation of Monoclinic VO by Hydrothermal Reaction 2 Powder:
[0047] (1) Measure 0.00525mol of citric acid into a 50mL beaker, add 20mL of deionized water, dissolve under magnetic stirring to form a transparent solution, and then weigh 0.0025molV 2 o 5 Add the solid powder to the above citric acid solution, and magnetically stir together for about 30 minutes to form a uniform yellow solution. The concentration of citric acid-vanadium pentoxide in the mixed solution is 0.025±5% g / mL;
[0048] (2) Pour the above yellow solution into a 50mL stainless steel hydrothermal synthesis reaction kettle, and measure 10mL of deionized water several times to rinse the residual drug in step (1), and add it to the reaction kettle together, and the final reaction solution is about 50mL , then put the reactor into an oven, heat to 190°C, and continue the reaction for 8 hours;
[0049] (3) After the above reaction time is over, the solid-liquid separa...
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