CN101885611B - Method for preparing piezoelectric material for roads by spraying technology - Google Patents
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- CN101885611B CN101885611B CN 201010239678 CN201010239678A CN101885611B CN 101885611 B CN101885611 B CN 101885611B CN 201010239678 CN201010239678 CN 201010239678 CN 201010239678 A CN201010239678 A CN 201010239678A CN 101885611 B CN101885611 B CN 101885611B
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Abstract
The invention discloses a method for preparing a piezoelectric material for roads by spraying technology. The method comprises the following steps of: pulverizing piezoelectric ceramic powder and spraying the pulverized powder; rolling and sintering the powder; and polarizing the powder to obtain the piezoelectric material. The problem of the preparation of a large-size piezoelectric material which is applicable for the roads in batch is solved. The piezoelectric material, which has a required size and is prepared by the preparation method, for the roads has the advantages of achieving one-step film thickness of up to 50 to 80 mu m, improving production rate by 30 to 40 percent, reducing energy consumption by about 30 percent and avoiding the volatilization of any organic solvent in a preparation process.
Description
Technical field
The invention belongs to the functional materials preparing technical field, relate to a kind of preparation method of piezoelectric, be specifically related to a kind of method of preparing piezoelectric material for roads by spraying technology.
Background technology
Along with expanding economy, the raising of living standards of the people, the recoverable amount of automobile significantly increases year by year, if can be transformed into road both sides even farther local resident living power utility by the automobile load that will travel on road, has very high social effect and economic worth.
Piezoelectric is a kind of desirable energy converting between mechanical material, has very high energy density, and its peak energy denisty can reach 100-10000kw/kg, and this utilizes very the piezo-electric device of small volume to produce high-power electric energy to become possibility with regard to making.In order to satisfy piezoelectric in this new application of energy converting between mechanical, need a kind of novel method to prepare and be suitable for the large size piezoelectric that mass-producing is used on the road.
Summary of the invention
The method that the purpose of this invention is to provide a kind of preparing piezoelectric material for roads by spraying technology, the method can make the piezoelectric of the size that requires as required, is particularly useful for the preparation of large size piezoelectric.
The technical solution adopted in the present invention is, a kind of method of preparing piezoelectric material for roads by spraying technology, and the method carries out piezoelectric ceramic powder to spray after powder process is processed, then it is carried out sintering after the roll extrusion, polarization makes piezoelectric material for roads at last, specifically carries out according to the following steps:
Step 1: powder process,
Adding concentration is 95% alcohol in piezoelectric ceramic powder, add alcohol 200ml in every kg piezoelectric ceramic powder, the piezoelectric ceramic powder that has added alcohol is placed ball mill, with rotating speed wet ball grinding 24～48h of 700 rev/mins, dry afterwards, obtain the powder that particle diameter is 0.5 ~ 1 μ m;
Step 2: spraying,
Choose the plastic base measure-alike with required piezoelectric, with dehydrated alcohol plastic base is carried out cleaning surfaces and process, the powder that step 1 is made is sprayed onto on the plastic base with spray gun, obtains base substrate;
Step 3: roll extrusion,
With the roll extrusion power of every square centimeter of 980N the base substrate that step 2 makes is carried out roll extrusion with roller;
Step 4, sinter molding,
The base substrate that step 3 was processed is incubated 1 hour under 250 ℃ of temperature condition, fusion and decomposition is removed the impurity such as plastic base, moisture and organism, then with the heat-up rate of 3～10 ℃/min with temperature increase to 700～1400 ℃, and under 700～1400 ℃ temperature, be incubated 1～2 hour, make the piezoelectric behind the sintering;
Step 5, polarization,
Piezoelectric behind the sintering that step 4 is made is two surface-coated conductive silver pastes up and down, dry piezoelectric after slurry makes sintering by silver electrode at 150 ℃ of lower insulation 1h; Then will be put into silicone oil by the piezoelectric after the silver electrode and carry out the silicone oil bath polarization, namely get the piezoelectric of desired size.
Wherein the particle diameter of the piezoelectric ceramic powder in the step 1 is 2 ~ 6 μ m.
Wherein spray gun pressure is 0.02～0.05MPa in the step 2, spray gun spraying distance 0.2～0.35m, spray gun spraying speed 200～700m/s, coating thickness 50～200 μ m.
Wherein the polarization temperature is 100～130 ℃ in the step 5, and Polarization field strength is 3～7kV/mm, and the polarization time is 20～60min.
The beneficial effect of the inventive method is can make required large-sized piezoelectric material for roads by this preparation method, and organic solvent-free to volatilize in preparation process.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The method of a kind of preparing piezoelectric material for roads by spraying technology of the present invention, its preparation technology specifically comprises:
Step 1: powder process,
Get the piezoelectric ceramic powder that particle diameter is 2 ~ 6 μ m, adding concentration is 95% alcohol in piezoelectric ceramic powder, adds alcohol 200ml in every kg piezoelectric ceramic powder, and place ball mill, with rotating speed wet ball grinding 24～48h of 700 rev/mins, dry afterwards, obtain the powder that particle diameter is 0.5 ~ 1 μ m;
Step 2: spraying,
Choose the plastic base measure-alike with required piezoelectric, with dehydrated alcohol plastic base is carried out cleaning surfaces and process, the powder that step 1 is made is sprayed onto on the plastic base with spray gun, obtains base substrate;
Wherein, spray gun pressure 0.02～0.05MPa, spray gun spraying distance 0.2～0.35m, speed 200～700m/s, coating thickness 50～200 μ m;
Step 3, roll extrusion,
For guaranteeing the planeness of made large size piezoelectric, with the roll extrusion power of every square centimeter of 980N the base substrate that step 2 makes is carried out roll extrusion with roller;
Step 4, sinter molding,
The base substrate that step 3 was processed is incubated 1 hour under 250 ℃ of temperature condition, fusion and decomposition is removed the impurity such as plastic base, moisture and organism, then with the heat-up rate of 3～10 ℃/min with temperature increase to 700～1400 ℃, and under 700～1400 ℃ temperature, be incubated 1～2 hour, make the piezoelectric behind the sintering;
Step 5, polarization,
Piezoelectric behind the sintering that step 4 is made is two surface-coated conductive silver pastes up and down, dry piezoelectric after slurry makes sintering by silver electrode at 150 ℃ of lower insulation 1h; Then will be put into silicone oil by the piezoelectric after the silver electrode and carry out the silicone oil bath polarization, namely get the piezoelectric of desired size;
Wherein, the polarization temperature is 100～130 ℃, and Polarization field strength is 3～7kV/mm, and the polarization time is 20～60min.
The piezoelectric that the preparation method of piezoelectric provided by the invention makes, the low-cost piezoelectric that can mass-producing on road uses.This preparation method's characteristics are that disposable film forming thickness can reach 50～80 μ m, can boost productivity 30～40%; Reduce energy consumption about 30%; The organic solvent-free volatilization is to laborer's not infringement of health.
Be layed in the piezoelectric of above-mentioned technique preparation in the road surface or directly as the road surface integral part, impact shock power is generated electricity during by Vehicle Driving Cycle, the electric energy that produces can serve as the required working power of road administration facility and resident living through the regulation of electrical circuit, storage, output.
Embodiment 1: the PZT(Pb (Zr of preparation 20cm * 20cm thickness 150 μ m
xTi
1-x) O
3Pb-based lanthanumdoped zirconate titanates) piezoelectric:
1. powder process,
Adding concentration is 95% alcohol in the PZT powder of particle diameter 2 ~ 6 μ m, is to add alcohol 200ml in every kg piezoelectric ceramic powder, and places ball mill, and with wet ball grinding 24h under 700 rev/mins the rotating speed, oven dry obtains the PZT powder of particle diameter 0.5 ~ 1 μ m in ball mill;
2. spraying,
Choose the plastic base of 20cm * 20cm, with dehydrated alcohol plastic base is carried out cleaning surfaces and process, the PZT powder that step 1 is obtained particle diameter 1 μ m is sprayed onto on the plastic base with spray gun, obtains the base substrate of 20cm * 20cm; Spray gun pressure 0.02MPa wherein, spray gun spraying be apart from 0.35m, spray gun spraying speed 500m/s, coating thickness 150 μ m;
3. roll extrusion,
For guaranteeing the planeness of made large size piezoelectric, utilize roller with the roll extrusion power of every square centimeter of 980N the base substrate that step 2 makes to be carried out roll extrusion;
4. sinter molding,
The base substrate that step 3 was processed was 250 ℃ of lower insulations 1 hour, and fusion and decomposition is removed plastic base and the impurity such as moisture, organism, then at the heat-up rate of 5 ℃/min with temperature increase to 1400 ℃, and insulation 2 hours under 1400 ℃ sintering temperature;
5. polarization,
Piezoelectric behind the sintering is coated with conductive silver paste in two surfaces up and down, dried piezoelectric after slurry makes sintering in 1 hour by silver electrode 150 ℃ of lower insulations, then will be put into silicone oil by the piezoelectric after the silver electrode and carry out the silicone oil bath polarization, the polarization temperature is 120 ℃, Polarization field strength is 5kV/mm, polarization time is 40min, namely obtains the PZT piezoelectric of 20cm * 20cm thickness 150 μ m.
Embodiment 2: (PZT) (Pb (Zr of preparation 15cm * 15cm thickness 80 μ m
xTi
1-x) O
3Pb-based lanthanumdoped zirconate titanates) piezoelectric:
1. powder process,
Be that to add concentration in the PZT powder of 2 ~ 6 μ m be 95% alcohol with particle diameter, be to add alcohol 200ml in every kg piezoelectric ceramic powder, and place ball mill that with 700 rev/mins rotating speed wet ball grinding 48h, oven dry obtains the PZT powder of particle diameter 0.5 ~ 1 μ m in ball mill;
2. spraying,
Choose the plastic base of 15cm * 15cm, with dehydrated alcohol plastic base is carried out cleaning surfaces and process, the PZT powder that step 1 is obtained particle diameter 0.6 μ m is sprayed onto on the plastic base with spray gun, obtains the base substrate of 15cm * 15cm; Spray gun pressure 0.05MPa, spray gun spraying be apart from 0.2m, speed 700m/s, coating thickness 80 μ m;
3. roll extrusion,
For guaranteeing the planeness of made large size piezoelectric, utilize roller to carry out roll extrusion with the roll extrusion power of every square centimeter of 980N;
4. sinter molding,
The base substrate that step 3 was processed is incubated 1 hour under 250 ℃ of temperature condition, fusion and decomposition is removed plastic base and the impurity such as moisture, organism, then with the heat-up rate of 10 ℃/min with temperature increase to 1240 ℃, and insulation 1 hour under 1240 ℃ sintering temperature;
5. polarization,
Piezoelectric behind the sintering that step 4 is made is two surface-coated conductive silver pastes up and down, dry piezoelectric after slurry makes sintering by silver electrode 150 ℃ of lower insulations 1, then will be put into silicone oil by the piezoelectric after the silver electrode and carry out the silicone oil bath polarization, the polarization temperature is 100 ℃, Polarization field strength is 3kV/mm, polarization time is 20min, namely obtains the PZT piezoelectric of 15cm * 15cm thickness 80 μ m.
Embodiment 3: the KNN(K of preparation 20cm * 20cm thickness 200 μ m
1-xNa
xNbO
3Potassium-sodium niobate) basic piezoelectric:
1. powder process,
Be 95% alcohol with adding concentration in the KNN powder of particle diameter 2 ~ 6 μ m, be to add alcohol 200ml in every kg piezoelectric ceramic powder, and place ball mill that with wet ball grinding under 700 rev/mins the rotating speed 48 hours, oven dry obtained the powder of particle diameter 0.5 ~ 1 μ m;
2. spraying,
Choose the plastic base of 20cm * 20cm, with dehydrated alcohol plastic base is carried out cleaning surfaces and process, the KNN powder that step 1 is obtained particle diameter 0.5 μ m is sprayed onto on the plastic base with spray gun, obtains the base substrate of 20cm * 20cm; Spray gun pressure 0.04MPa, spray gun spraying be apart from 0.3m, speed 200m/s, coating thickness 200 μ m;
3. roll extrusion,
For guaranteeing the planeness of made large size piezoelectric, utilize roller to carry out roll extrusion with the roll extrusion power of every square centimeter of 980N;
4. sinter molding,
The base substrate that step 3 was processed was 250 ℃ of lower insulations 1 hour, and fusion and decomposition is removed plastic base and the impurity such as moisture, organism, then with the heat-up rate of 3 ℃/min with temperature increase to 700 ℃, and insulation 2 hours under 700 ℃ sintering temperature;
5. polarization,
Piezoelectric behind the sintering that step 4 is made is two surface-coated conductive silver pastes up and down, dry piezoelectric after slurry makes sintering in 1 hour by silver electrode 150 ℃ of lower insulations; Then will be put into silicone oil by the piezoelectric after the silver electrode and carry out the silicone oil bath polarization, the polarization temperature is 130 ℃, and Polarization field strength is 7kV/mm, and the polarization time is 60min, namely obtains the KNN piezoelectric of 20cm * 20cm thickness 200 μ m.
Embodiment 4: the BNKT((Na of preparation 15cm * 15cm thickness 50 μ m
xK
1-x)
0.5Bi
0.5TiO
3Bismuth sodium potassium titanate) piezoelectric
1. powder process,
Add concentration and be 95% alcohol in the BNKT powder of particle diameter 2 ~ 6 μ m, be to add alcohol 200ml in every kg piezoelectric ceramic powder, and place ball mill, with 700 rev/mins rotating speed wet ball grinding 36 hours, oven dry obtained the powder of particle diameter 0.5 ~ 1 μ m in ball mill;
2. spraying,
Choose the plastic base of 15cm * 15cm, with dehydrated alcohol plastic base is carried out cleaning surfaces and process, the BNKT powder that step 1 is obtained particle diameter 0.8 μ m is sprayed onto on the plastic base with spray gun, obtains the base substrate of 15cm * 15cm; Spray gun pressure 0.04MPa, spray gun spraying be apart from 0.3m, spray gun spraying speed 600m/s, coating thickness 50 μ m;
3. roll extrusion,
For guaranteeing the planeness of made large size piezoelectric, utilize roller to carry out roll extrusion with the roll extrusion power of every square centimeter of 980N;
4. sinter molding,
The base substrate that step 3 was processed was 250 ℃ of lower insulations 1 hour, and fusion and decomposition is removed plastic base and the impurity such as moisture, organism, then with the heat-up rate of 5 ℃/min with temperature increase to 1140 ℃, and insulation 1.5 hours under 1140 ℃ sintering temperature;
5. polarization,
Piezoelectric behind the sintering that step 4 is made is coated with conductive silver paste in two surfaces up and down, dried piezoelectric after slurry makes sintering in 1 hour by silver electrode 150 ℃ of lower insulations, then will be put into silicone oil by the piezoelectric after the silver electrode and carry out the silicone oil bath polarization, the polarization temperature is 120 ℃, Polarization field strength is 6kV/mm, polarization time is 30min, namely obtains the BNKT piezoelectric of 15cm * 15cm thickness 50 μ m.
Claims (4)
1. the method for a preparing piezoelectric material for roads by spraying technology is characterized in that, the method carries out piezoelectric ceramic powder to spray after powder process is processed, then it is carried out sintering after the roll extrusion, polarization makes piezoelectric material for roads at last, specifically carries out according to the following steps:
Step 1: powder process,
Adding concentration is 95% alcohol in piezoelectric ceramic powder, add alcohol 200ml in every kg piezoelectric ceramic powder, the piezoelectric ceramic powder that has added alcohol is placed ball mill, with rotating speed wet ball grinding 24～48h of 700 rev/mins, dry afterwards, obtain the powder that particle diameter is 0.5 ~ 1 μ m;
Step 2: spraying,
Choose the plastic base measure-alike with required piezoelectric, with dehydrated alcohol plastic base is carried out cleaning surfaces and process, the powder that step 1 is made is sprayed onto on the plastic base with spray gun, obtains base substrate;
Step 3: roll extrusion,
With the roll extrusion power of every square centimeter of 980N the base substrate that step 2 makes is carried out roll extrusion with roller;
Step 4, sinter molding,
The base substrate that step 3 was processed is incubated 1 hour under 250 ℃ of temperature condition, fusion and decomposition is removed plastic base, moisture and organic impurities, then with the heat-up rate of 3～10 ℃/min with temperature increase to 700～1400 ℃, and under 700～1400 ℃ temperature, be incubated 1～2 hour, make the piezoelectric behind the sintering;
Step 5, polarization,
Piezoelectric behind the sintering that step 4 is made is two surface-coated conductive silver pastes up and down, dry piezoelectric after slurry makes sintering by silver electrode at 150 ℃ of lower insulation 1h; Then will be put into silicone oil by the piezoelectric after the silver electrode and carry out the silicone oil bath polarization, namely get the piezoelectric of desired size.
2. method according to claim 1 is characterized in that, the particle diameter of the piezoelectric ceramic powder in the described step 1 is 2 ~ 6 μ m.
3. method according to claim 1 is characterized in that, spray gun pressure is 0.02～0.05MPa in the described step 2, spray gun spraying distance 0.2～0.35m, spray gun spraying speed 200～700m/s, coating thickness 50～200 μ m.
4. method according to claim 1 is characterized in that, the polarization temperature is 100～130 ℃ in the described step 5, and Polarization field strength is 3～7kV/mm, and the polarization time is 20～60min.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4071594A (en) * | 1974-09-03 | 1978-01-31 | Aluminum Company Of America | Production of continuous ceramic fibers |
| CN1546427A (en) * | 2003-12-05 | 2004-11-17 | �й���ѧԺ�����о��� | Doped lead antimony manganese zirconia titanate piezoelectric ceramic materials suitable for industrial production and method for preparing same |
| CN1699280A (en) * | 2005-06-02 | 2005-11-23 | 武汉理工大学 | Niobate leadless piezoelectric material material and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4071594A (en) * | 1974-09-03 | 1978-01-31 | Aluminum Company Of America | Production of continuous ceramic fibers |
| CN1546427A (en) * | 2003-12-05 | 2004-11-17 | �й���ѧԺ�����о��� | Doped lead antimony manganese zirconia titanate piezoelectric ceramic materials suitable for industrial production and method for preparing same |
| CN1699280A (en) * | 2005-06-02 | 2005-11-23 | 武汉理工大学 | Niobate leadless piezoelectric material material and preparation method thereof |
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