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公开(公告)号：US5780957A
公开(公告)日：1998-07-14
申请号：US747138
申请日：1996-11-12
CPC分类号： H02N2/023 , B60J1/17 , E05F15/689 , E05Y2900/55
摘要： A piezoelectric moving linear motor consists of three piezoelectric actuators which are controlled relative to each other. One piezoelectric actuators causes two blocks to move away from each other in opposition to a spring force. The other two piezoelectric actuators selectively clamp a block to a guide shaft. By cyclically controlling the actuation of the three piezoelectric actuators, the motor is able to move the blocks axially along the guide shaft. Preferably, a vehicle component such as a window is fixed to one block and is caused to move along the guide shaft.
摘要翻译： 压电移动线性电动机由相对于彼此控制的三个压电致动器组成。 一个压电致动器使得两个块相对于弹簧力彼此远离地移动。 另外两个压电致动器选择性地将块固定到导向轴上。 通过循环地控制三个压电致动器的致动，马达能够沿着引导轴轴向移动块。 优选地，诸如窗户的车辆部件被固定到一个块并且被引导以沿着导向轴移动。
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公开(公告)号：US5595677A
公开(公告)日：1997-01-21
申请号：US452923
申请日：1995-05-30
IPC分类号： C04B35/491 , H01L41/187
CPC分类号： C04B35/491 , H01L41/187
摘要： PLZT piezoelectric ceramics having the general formula (Pb.sub.1-x La.sub.x)(Zr.sub.y Ti.sub.1-y).sub.1-(x/4) O.sub.3 are fabricated in a hot forging process using PbO, TiO.sub.2, ZrO.sub.2, and La.sub.2 O.sub.3 powders as starting materials with Nb.sub.2 O.sub.5 added to provide niobium (Nb) as a dopant. The ZrO.sub.2 and TiO.sub.2 powders are mixed at a molar ratio of y/(1-y), calcined at approximately 1300.degree.-1500.degree. C., ball milled in acetone, and evaporated to a dry powder. The mixture of ZrO.sub.2 and TiO.sub.2 is then combined with the PbO, La.sub.2 O.sub.3, and Nb.sub.2 O.sub.5 powders, and the new mixture is ball milled in acetone, evaporated to a dry powder, calcined at approximately 700.degree.-850.degree. C., and sifted to obtain a particle size of approximately 0.3-2.0 .mu.m. The final PLZT powder is formed into the desired shape by cold pressing followed by sintering at approximately 1000.degree.-1150.degree. C. in oxygen. The PLZT ceramic material is further densifted to about 98.5% of the material's theoretical maximum density by heating to approximately 1175.degree.-1275.degree. C. at 800-1200 psi uniaxial pressure. The resulting high performance Nb-doped PLZT piezoelectric ceramic exhibits an average grain size of about 3 .mu.m, a well-defined polarization hysteresis loop, reduced strain hysteresis with the application of a unipolar electric field, a breakdown strength greater than 25 kV/cm, a linear piezoelectric coefficient (d.sub.33) greater than 750, maximum strain greater than 0.15%, and a fatigue life of at least 10.sup.10 cycles.
摘要翻译： 在使用PbO，TiO 2，ZrO 2和La 2 O 3粉末作为起始原料的热锻造工艺中制备具有通式（Pb1-xLax）（Zry Ti1-y）1-（x / 4）O3的PLZT压电陶瓷，其中添加Nb 2 O 5 提供铌（Nb）作为掺杂剂。 将ZrO 2和TiO 2粉末以y /（1-y）的摩尔比混合，在约1300-150℃下煅烧，在丙酮中球磨，并蒸发成干燥粉末。 然后将ZrO 2和TiO 2的混合物与PbO，La 2 O 3和Nb 2 O 5粉末组合，将新混合物在丙酮中球磨，蒸发至干粉末，在约700℃-850℃下煅烧，并筛分得到 粒径约0.3-2.0μm。 通过冷压将最终的PLZT粉末形成所需形状，然后在约1000-111℃在氧气中烧结。 通过在800-1200psi单轴压力下加热至约1175℃-1275℃，将PLZT陶瓷材料进一步致密化为材料理论最大密度的约98.5％。 所得到的高性能Nb掺杂的PLZT压电陶瓷的平均晶粒尺寸约为3μm，明确的极化磁滞回线，施加单极电场减小的应变滞后，击穿强度大于25kV / cm ，大于750的线性压电系数（d33），最大应变大于0.15％，疲劳寿命至少为1010次。
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公开(公告)号：US5607632A
公开(公告)日：1997-03-04
申请号：US452927
申请日：1995-05-30
IPC分类号： C04B35/491 , C04B35/49
CPC分类号： C04B35/491
摘要： PLZT piezoelectric ceramics having the general formula (Pb.sub.1-x La.sub.x)(Zr.sub.y Ti.sub.1-y).sub.1-(x/4) O.sub.3 are fabricated in a hot forging process using PbO, TiO.sub.2, ZrO.sub.2, and La.sub.2 O.sub.3 powders as starting materials with Nb.sub.2 O.sub.5 added to provide Nb as a dopant. The ZrO.sub.2 and TiO.sub.2 powders are mixed at a molar ratio of y/(1-y), calcined at approximately 1300.degree.-1500.degree. C., ball milled in acetone, and evaporated to a dry powder. The mixture of ZrO.sub.2 and TiO.sub.2 is then combined with the PbO, La.sub.2 O.sub.3, and Nb.sub.2 O.sub.5 powders, and the new mixture is ball milled in acetone, evaporated to a dry powder, calcined at approximately 700.degree.-850.degree. C., and sifted to obtain a particle size of approximately 0.3-2.0 .mu.m. The final PLZT powder is formed into the desired shape by cold pressing followed by sintering at approximately 1000.degree.-1150.degree. C. in oxygen. The PLZT ceramic material is further densified to about 98.5% of the material's theoretical maximum density by heating to approximately 1175.degree.-1275.degree. C. at 800-1200 psi uniaxial pressure. The resulting high performance Nb-doped PLZT piezoelectric ceramic exhibits an average grain size of about 3 .mu.m, a well-defined polarization hysteresis loop, reduced strain hysteresis with the application of a unipolar electric field, a breakdown strength greater than 25 kV/cm, a linear piezoelectric coefficient (d.sub.33) greater than 750, maximum strain greater than 0.15%, and a fatigue life of at least 10.sup.10 cycles.
摘要翻译： 在使用PbO，TiO 2，ZrO 2和La 2 O 3粉末作为原料的热锻造工艺中制造具有通式（Pb1-xLax）（ZryTi1-y）1-（x / 4）O3）的PLZT压电陶瓷， Nb作为掺杂剂。 将ZrO 2和TiO 2粉末以y /（1-y）的摩尔比混合，在约1300-150℃下煅烧，在丙酮中球磨，并蒸发成干燥粉末。 然后将ZrO 2和TiO 2的混合物与PbO，La 2 O 3和Nb 2 O 5粉末组合，将新混合物在丙酮中球磨，蒸发至干粉末，在约700℃-850℃下煅烧，并筛分得到 粒径约0.3-2.0μm。 通过冷压将最终的PLZT粉末形成所需形状，然后在约1000-111℃在氧气中烧结。 PLZT陶瓷材料通过在800-1200psi单轴压力下加热至约1175℃-1275℃，进一步致密化至材料理论最大密度的约98.5％。 所得到的高性能Nb掺杂的PLZT压电陶瓷的平均晶粒尺寸约为3μm，明确的极化磁滞回线，施加单极电场减小的应变滞后，击穿强度大于25kV / cm ，大于750的线性压电系数（d33），最大应变大于0.15％，疲劳寿命至少为1010次。
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公开(公告)号：US06279878B1
公开(公告)日：2001-08-28
申请号：US09561094
申请日：2000-04-28
IPC分类号： C04B35493
CPC分类号： H01L41/187 , C04B35/491 , C04B35/493
摘要： PLZT piezoelectric ceramics having the general formula (Pb1−xLax)(ZryTi1−y)1−(x/4)−zMa+4z/a O3 are fabricated in a hot forging process using PbO, TiO2, ZrO2, and La2O3 powders with Nb2O5 and Ta2O5 added to provide 2.0-3.0% Nb5+ (mole %) and 2.0-3.0% Ta+5 (mole %) as a dopant. ZrO2 and TiO2 powders are mixed at a molar ratio of y/(1−y), the preferred molar ratio being 55/45, calcined at approximately 1300° C.-1500° C., ball milled in acetone, and evaporated to a dry powder. The mixture of ZrO2 and TiO2 is then combined with PbO2, La2O3, Nb2O5 and Ta2O5 powders, and the new mixture is ball milled in acetone, evaporated to a dry powder, calcined at approximately 700°-850° C., and sifted to obtain a particle size of approximately 0.5-1.5 &mgr;m. The final Nb/Ta-doped PLZT powder is formed into the desired shape by cold pressing followed by sintering at approximately 1000° C.-1150° C. in oxygen. The PLZT ceramic material is further densified to about 98.5% of the material's theoretical maximum density by heating to approximately 1175° C.-1275° C. at 300-1200 psi uniaxial pressure. The resulting high temperature, high performance Nb/Ta-doped PLZT piezoelectric ceramic exhibits an average grain size of about 3 &mgr;m, a well-defined polarization hysteresis loop, reduced strain hysteresis with the application of a unipolar electric field, a breakdown strength greater than 25 kV/cm, a linear piezoelectric coefficient (d33) of about 790 pC/N, maximum strain greater than 0.16%, and a fatigue life of at least 108 cycles and a Tc of about 205-208° C.
摘要翻译： 具有通式（Pb1-xLax）（ZryTi1-y）1-（x / 4）-zMa + 4z / aO3的PLZT压电陶瓷是在使用PbO，TiO2，ZrO2和La2O3粉末与Nb2O5的热锻造工艺中制造的 并添加Ta2O5，以提供2.0-3.0％的Nb5 +（摩尔％）和2.0-3.0％的Ta + 5（摩尔％）作为掺杂剂。 ZrO 2和TiO 2粉末以y /（1-y）的摩尔比混合，优选的摩尔比为55/45，在约1300℃-1500℃下煅烧，在丙酮中球磨并蒸发至 干燥的粉。 然后将ZrO 2和TiO 2的混合物与PbO 2，La 2 O 3，Nb 2 O 5和Ta 2 O 5粉末组合，将新混合物在丙酮中球磨，蒸发至干粉末，在约700℃-850℃下煅烧，并筛分得到 粒径约为0.5-1.5μm。 通过冷压将最终的Nb / Ta掺杂的PLZT粉末形成所需的形状，然后在约1000℃-1150℃的氧气中烧结。 通过在300-1200psi单轴压力下加热至约1175℃-1275℃，将PLZT陶瓷材料进一步致密化为材料理论最大密度的约98.5％。 所得到的高温，高性能Nb / Ta掺杂的PLZT压电陶瓷的平均晶粒尺寸约为3μm，明确的极化磁滞回线，应用单极电场的应变滞后减小，击穿强度大于 25kV / cm，约790pC / N的线性压电系数（d33），最大应变大于0.16％，疲劳寿命至少为108次循环，Tc为约205-208℃。
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公开(公告)号：US5780956A
公开(公告)日：1998-07-14
申请号：US747140
申请日：1996-11-12
CPC分类号： H02N2/101 , B60J1/17 , E05F15/689 , E05Y2900/55
摘要： A piezoelectric drive to provide a rotary force to a rotating element includes a pair of circumferentially spaced fingers. The fingers are selectively moved towards and away from the rotating element with piezoelectric actuators that expand and contract. An intermediate piezoelectric actuator moves the two fingers away from each other or allows them to be moved towards each other. A bias force acts in opposition to the intermediate piezoelectric actuator. By controlling the three piezoelectric actuators, the system rotates the rotating element. The system is preferably utilized for driving a vehicle component, and most preferably, a window for a vehicle. The inventive motor provides a low cost compact motor for driving vehicle components.
摘要翻译： 向旋转元件提供旋转力的压电驱动器包括一对周向间隔开的指状物。 使用膨胀和收缩的压电致动器选择性地使手指朝向和远离旋转元件移动。 中间压电致动器使两个手指彼此远离或允许它们彼此移动。 偏压力与中间压电致动器相反。 通过控制三个压电致动器，系统旋转旋转元件。 该系统优选用于驾驶车辆部件，最优选地用于车辆的车窗。 本发明的电动机提供用于驾驶车辆部件的低成本小型电动机。
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