P-n-BaTiO3/NiO heterojunction piezoelectric ceramic, preparation method thereof and application in self-powered efficient hydrogen production
A p-n-batio3, n-batio3 technology, applied in the field of p-n-BaTiO3/NiO heterojunction piezoelectric ceramic materials, can solve the problems of low piezoelectric catalytic efficiency and easy charge recombination
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Embodiment 1
[0062] The p-n-BaTiO 3 The preparation method of / NiO heterojunction piezoelectric ceramic material comprises the following steps:
[0063] (1) Preparation of BaTiO 3 Ceramic blank particles: react barium chloride, titanium chloride and sodium hydroxide to form BaTiO 3 ceramic pellets;
[0064] (2) Granulation: to the BaTiO obtained in step (1) 3 A certain amount of polyvinyl alcohol solution is added to the granules, and then ball milled to granulate;
[0065] (3) Preparation of pottery: the BaTiO obtained in step (2) 3 The ceramic blank particles are added into a mold of a certain size, and pressed into a ceramic blank under a pressure of 10MPa by a film pressing machine;
[0066] (4) Degumming: heat the pottery blank to 520°C, and carry out degumming treatment at a constant temperature for 2 hours;
[0067] (5) Molding: After degumming, treat it at a temperature of 1100°C for 2 hours, and make BaTiO after cooling 3 ceramics;
[0068] (6)p-n-BaTiO 3 / NiO Piezoelectri...
Embodiment 2
[0075] The p-n-BaTiO 3 The preparation method of / NiO heterojunction piezoelectric ceramic material comprises the following steps:
[0076] (1) Preparation of BaTiO 3 Ceramic blank particles: react barium nitrate, titanium nitrate and ammonia water to form BaTiO 3 ceramic pellets;
[0077] (2) Granulation: to the BaTiO obtained in step (1) 3 A certain amount of polyvinyl alcohol solution is added to the ceramic granules, and then ball milled to granulate;
[0078] (3) Preparation of pottery: the BaTiO obtained in step (2) 3 The particles are added into a mold of a certain size, and pressed into a ceramic blank under a pressure of 15MPa by a film pressing machine;
[0079] (4) Degumming: heat the pottery blank to 450°C, and degumming at constant temperature for 2 hours;
[0080] (5) Molding: After degumming, treat it at a temperature of 1200°C for 1 hour, and make BaTiO after cooling 3 ceramics;
[0081] (6)p-n-BaTiO 3 / NiO Piezoelectric Ceramics: In BaTiO 3 Uniform co...
Embodiment 3
[0088] The p-n-BaTiO 3 The preparation method of / NiO heterojunction piezoelectric ceramic material comprises the following steps:
[0089] (1) Preparation of BaTiO 3 Ceramic blank particles: react barium chloride, titanium nitrate and potassium hydroxide to form BaTiO 3 ceramic pellets;
[0090] (2) Granulation: to the BaTiO obtained in step (1) 3 A certain amount of polyvinyl alcohol solution is added to the ceramic granules, and then ball milled to granulate;
[0091] (3) Preparation of pottery: the BaTiO obtained in step (2) 3 The ceramic blank particles are added into a mold of a certain size, and pressed into a ceramic blank under a pressure of 20MPa by a film pressing machine;
[0092] (4) Degumming: heat the pottery blank to 500°C, and carry out degumming treatment at constant temperature for 2 hours;
[0093] (5) Molding: After degumming, treat it at a temperature of 1150°C for 1 hour, and make BaTiO after cooling 3 ceramics;
[0094] (6)p-n-BaTiO 3 / NiO Piezo...
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