CN1296429C - Method for modifying polymer orientation in magnetic-force-electric coupling effect - Google Patents
Method for modifying polymer orientation in magnetic-force-electric coupling effect Download PDFInfo
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- CN1296429C CN1296429C CNB200510018227XA CN200510018227A CN1296429C CN 1296429 C CN1296429 C CN 1296429C CN B200510018227X A CNB200510018227X A CN B200510018227XA CN 200510018227 A CN200510018227 A CN 200510018227A CN 1296429 C CN1296429 C CN 1296429C
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- polymkeric substance
- piezoelectric
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- ferromagnetic material
- piezoelectric ceramics
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Abstract
The present invention relates to a method for enhancing the piezoelectric performance and the magnetoelectric performance of a composite material of piezoelectric ceramic, a polymers and ferromagnetic materials and a composite material of piezoelectric ceramic and a polymer, wherein the polymer is polyvinyl acetal, polymethyl methacrylate, polyvinyl chloride, polyethylene, polypropylene, polyvinylidene difluoride or nylon, the piezoelectric ceramic is lead zirconate titanate, lead titanate, barium titanate, niobium-magnesium lead titanate, modified ceramic adulterated with lead zirconate titanate and three-element ceramic, and the ferromagnetic materials are terbium, dysprosium and ferrum.
Description
Technical field:
The present invention relates to a kind of by changing the structure of inertia gathering compound in the magnetic-force-electric coupling effect, reduce stress loss in the magnetic-force-electric coupling effect, transmit the method that influences the functional problem of matrix material as inertia mutually with piezoelectric property and magnetic electricity performance, the solution of polymkeric substance and ferromagnetic material matrix material and piezoelectric ceramics and polymer composites thereby improve piezoelectric ceramics.
Background technology:
Ferroelectric and ferromagnetic and polymer composites not only possesses the piezoelectric effect of ferroelectric material, the magnetic stretching effect of ferromagnetic material, and has magnetic electricity performance by ferroelectric phase with ferromagnetic magnetic-Li-electric coupling mutually.Because ferroelectric material and ferromagnetic material two-phase are difficult to be combined with each other by traditional sintering process, therefore need be compound with polymkeric substance, the bonding realization magnetic-Li-electric coupling by polymkeric substance has magnetic electricity performance.But because the influence of textural factors such as modulus can produce bigger stress loss in magnetic-Li-electric coupling, therefore can reduce ferroelectric and piezoelectric property and magnetic electricity performance ferromagnetic composite material greatly as the polymkeric substance of inertia phase.So functional influence that mainly is subjected to polymer architecture of ferroelectric and ferromagnetic and polymer composites.Change the intensity and the rigidity of polymkeric substance, make polymer architectureization, can reduce the stress loss in the magnetic-force-electric coupling effect, thereby improve the functional of matrix material.
Crystallization, orientation and crosslinked be the main method that improves polymer strength, rigidity.Orientation is the effect by external force, by the orientation unit of polymkeric substance, as aligning of crystallite, segment or whole molecular chain, changes the microtexture of polymkeric substance, improves the intensity and the rigidity of polymkeric substance.
In polymkeric substance and piezo-electric ceramic composite material, piezoelectric ceramics Pb-based lanthanumdoped zirconate titanates (PZT), lead titanate (PT), barium titanate (BT), PMNT, various PZT doping modified ceramic and ternary ceramics have higher piezoelectric property, as the piezoelectric constant d of PZT
33Can reach 400～500pC/N, PT can reach 100pC/N, but because self fragility is bigger, often utilizes the snappiness of polymkeric substance to prepare the processing characteristics that piezo-electricity composite material improves piezoelectric ceramics.From existing document as can be seen, the preparation piezo-electricity composite material, selectable polymkeric substance has: polymethylmethacrylate (PMMA), Resins, epoxy, silicon rubber, polyethylene (PE), polypropylene (PP), polyvinylidene difluoride (PVDF) (PVDF), vinylidene and trifluoro-ethylene copolymer (P (VDF-TrFE)) and nylon etc., but the introducing of polymkeric substance, the piezoelectric property of matrix material reduces significantly, with PZT and PVDF matrix material is example, comparatively the piezoelectric constant d of ideal, operable PZT and PVDF matrix material
33Maximum can reach 60pC/N, and this mainly is because the stress loss of PVDF has influenced the power-fax in the matrix material and passed.In ferroelectric and ferromagnetic and polymer composites, the stress loss of polymkeric substance influences the piezoelectric property of matrix material equally, has also influenced the magnetic electricity performance of matrix material then.
Summary of the invention:
The present invention mainly solves piezoelectric ceramics and polymkeric substance and ferromagnetic material matrix material, piezoelectric ceramics and polymer composites are because piezoelectric property and the lower problem of magnetic electricity performance that the stress loss of polymkeric substance causes, provide a kind of method that changes polymer architecture to improve piezoelectric ceramics and polymkeric substance and ferromagnetic material matrix material, the piezoelectric property of piezoelectric ceramics and polymer composites and magnetic electricity performance.
Realize that technical scheme of the present invention is:
A kind of raising piezoelectric ceramics and polymkeric substance and ferromagnetic material matrix material, the piezoelectric property of piezoelectric ceramics and polymer composites and the method for magnetic electricity performance, polymkeric substance is polyvinyl acetal, polymethylmethacrylate, polyvinyl chloride, polyethylene (PE), polypropylene (PP), polyvinylidene difluoride (PVDF) (PVDF) or nylon, adopt the method for polymer orientation modification, its method is:
By volume per-cent is polymkeric substance 30～50%, ferromagnetic material 0～12%, all the other are piezoelectric ceramics, take by weighing piezoelectric ceramics, ferromagnetic material and polymkeric substance, more than the glass transition temperature Tg of polymkeric substance, below the fusing point Tm, polymkeric substance is added piezoelectric ceramic powder and ferromagnetic material in mill mixing in flakes, and control mill speed range is 10～30r/min, and mixing time 20～30min promptly obtains the matrix material that piezoelectric property and magnetic electricity performance are improved.
Wherein said piezoelectric ceramics is Pb-based lanthanumdoped zirconate titanates (PZT), lead titanate (PT), barium titanate (BT), PMNT, PZT doping modified ceramic or ternary ceramics, and described ferromagnetic material is terbium dysprosium ferrum (Terfenol-D)
The drawing force of the shearing force of the present invention by mill when mixing makes matrix material in blocks, obtains the matrix material of polymer orientation.
Description of drawings:
Fig. 1 opens the SEM photo that is smelt the type matrix material.
Fig. 2 is the SEM photo of compression molding matrix material
As can be seen from comparison with Figure 1 and Figure 2, open and be smelt in the type matrix material polymer P VDF orientation that is stretched, it is thread that polymkeric substance becomes, and PVDF assembles agglomerating in the compression molding matrix material.
Embodiment
Embodiment 1: PVDF and PZT are taken by weighing by 30: 70 volume ratios, under 140 ℃, in mill, add PVDF and PZT, mixing rotating speed is 15r/min, mixing time 25min, the drawing force of shearing force by mill when mixing makes matrix material in blocks, obtains the matrix material of polymer orientation.Open the SEM contrast photo that is smelt the type matrix material and see Fig. 1, the SEM photo of compression molding matrix material is seen Fig. 2.Open the piezoelectric constant d that is smelt the type matrix material
33Be 85pC/N, the piezoelectric constant d of compression molding matrix material
33Be 50pC/N.
Embodiment 2: PVDF, PZT and Terfenol-D are taken by weighing by 40: 55: 5 volume ratios, under 135 ℃, in mill, add PVDF, PZT and Terfenol-D, the control rotating speed is at 20r/min, mixing time 30min, the drawing force of shearing force by mill when mixing makes matrix material in blocks, obtains the matrix material of polymer orientation.The magnetoelectricity gain factor α E of matrix material
33Be 65mV/cm Oe.
Embodiment 3: PE, PZT and Terfenol-D are taken by weighing by 25: 70: 5 volume ratios, under 125 ℃, in mill, add PE, PZT and Terfenol-D, mixing rotating speed 20r/min, mixing time 25min, the drawing force of shearing force by mill when mixing makes matrix material in blocks, obtains the matrix material of polymer orientation.The magnetoelectricity gain factor α E of matrix material
33Be 72mV/cm Oe.
Embodiment 4: polyvinyl butyral acetal and PT are taken by weighing by 30: 70 volume ratios, under 120 ℃, in mill, carry out mixing, control mill rotating speed is 10r/min, the drawing force of the shearing force of mixing time 20min by mill when mixing makes matrix material in blocks, obtains the matrix material of polymer orientation.The piezoelectric constant d of matrix material
33Be 65pC/N.
Embodiment 5: copolymer nylon, PZT and Terfenol-D are taken by weighing by 30: 65: 5 volume ratios, under 160 ℃, in mill, add copolymer nylon, PZT and Terfenol-D, control rotating speed 30r/min, mixing time 25min, the drawing force of shearing force by mill when mixing makes matrix material in blocks, obtains the matrix material of polymer orientation.The magnetoelectricity gain factor α E of matrix material
33Be 85mV/cm Oe.
Embodiment 6: PP, PZT and Terfenol-D are taken by weighing by 35: 60: 5 volume ratios, under 160 ℃, in mill, add PP, PZT and Terfenol-D, control rotating speed 20r/min, mixing time 30min, the drawing force of shearing force by mill when mixing makes matrix material in blocks, obtains the matrix material of polymer orientation.The magnetoelectricity gain factor α E of matrix material
33Be 55mV/cm Oe.
Claims (1)
1, a kind of raising piezoelectric ceramics and polymkeric substance and ferromagnetic material matrix material, the piezoelectric property of piezoelectric ceramics and polymer composites and the method for magnetic electricity performance, polymkeric substance is a polyvinyl acetal, polymethylmethacrylate, polyvinyl chloride, polyethylene, polypropylene, polyvinylidene difluoride (PVDF) or nylon, it is characterized in that by volume per-cent is polymkeric substance 30～50%, ferromagnetic material 0～12%, all the other are piezoelectric ceramics, take by weighing piezoelectric ceramics, ferromagnetic material and polymkeric substance, more than the glass transition temperature Tg of polymkeric substance, below the fusing point Tm, polymkeric substance is added piezoelectric ceramic powder and ferromagnetic material in mill mixing in flakes, control mill speed range is 10～30r/min, mixing time 20～30min, promptly obtain the matrix material that piezoelectric property and magnetic electricity performance are improved, wherein said piezoelectric ceramics is a Pb-based lanthanumdoped zirconate titanates, lead titanate, barium titanate, PMNT, Pb-based lanthanumdoped zirconate titanates doping modified ceramic or ternary ceramics, described ferromagnetic material are terbium dysprosium ferrum.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200510018227XA CN1296429C (en) | 2005-01-31 | 2005-01-31 | Method for modifying polymer orientation in magnetic-force-electric coupling effect |
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| CNB200510018227XA CN1296429C (en) | 2005-01-31 | 2005-01-31 | Method for modifying polymer orientation in magnetic-force-electric coupling effect |
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| CN1670073A CN1670073A (en) | 2005-09-21 |
| CN1296429C true CN1296429C (en) | 2007-01-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7989530B2 (en) | 2005-11-23 | 2011-08-02 | General Electric Company | Nonlinear polymer composites and methods of making the same |
| US7923497B2 (en) * | 2005-11-23 | 2011-04-12 | General Electric Company | Antiferroelectric polymer composites, methods of manufacture thereof, and articles comprising the same |
| US8247484B2 (en) | 2008-06-12 | 2012-08-21 | General Electric Company | High temperature polymer composites and methods of making the same |
| US9390857B2 (en) | 2008-09-30 | 2016-07-12 | General Electric Company | Film capacitor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4128489A (en) * | 1975-12-29 | 1978-12-05 | Mitsubishi Petrochemical Company Limited | Piezo-electric material |
| CN1392194A (en) * | 2002-07-02 | 2003-01-22 | 武汉理工大学 | Poly meta-fluoroethylene/lead zirconate titanate/terbium dysprosium iron composite material sheet with magnetoelectric property and its preparation |
| CN1395325A (en) * | 2002-07-12 | 2003-02-05 | 清华大学 | Three-component compound magnetoelectric material using organic polymer as adhesive and its preparation method |
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- 2005-01-31 CN CNB200510018227XA patent/CN1296429C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4128489A (en) * | 1975-12-29 | 1978-12-05 | Mitsubishi Petrochemical Company Limited | Piezo-electric material |
| CN1392194A (en) * | 2002-07-02 | 2003-01-22 | 武汉理工大学 | Poly meta-fluoroethylene/lead zirconate titanate/terbium dysprosium iron composite material sheet with magnetoelectric property and its preparation |
| CN1395325A (en) * | 2002-07-12 | 2003-02-05 | 清华大学 | Three-component compound magnetoelectric material using organic polymer as adhesive and its preparation method |
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