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公开(公告)号：US6049160A
公开(公告)日：2000-04-11
申请号：US114267
申请日：1998-07-13
IPC分类号： H01L41/08 , H01L41/083 , H01L41/18 , H01L41/22
CPC分类号： H01L41/183 , H01L41/37 , B29C67/0055
摘要： This invention relates to a new class of piezoelectric composites with a radial design. More particularly, the radial design of these new ceramic/polymer composites show a higher sensitivity in the radial direction than conventional tube structured devices. Devices made utilizing this novel design will therefore show significantly enhanced performance in many applications.
摘要翻译： 本发明涉及一种具有径向设计的新型压电复合材料。 更具体地，这些新型陶瓷/聚合物复合材料的径向设计显示出比常规管结构设备更高的径向灵敏度。 因此，使用这种新颖设计的设备将在许多应用中显示出显着增强的性能。
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公开(公告)号：US5818149A
公开(公告)日：1998-10-06
申请号：US622510
申请日：1996-03-25
申请人： Ahmad Safari , Victor F. Janas , Amit Bandyopadhyay , Rajesh K. Panda , Mukesh Agarwala , Stephen C. Danforth
发明人： Ahmad Safari , Victor F. Janas , Amit Bandyopadhyay , Rajesh K. Panda , Mukesh Agarwala , Stephen C. Danforth
CPC分类号： H01L41/37 , H01L41/183
摘要： A process for forming novel ceramic composites is described. The disclosed process allows for novel composite designs, including composites with regions containing different materials. Moreover, the disclosed process allows for the manufacture of composites with volume fraction gradients of different types of material. Composites with fine-scale microstructures may be formed.
摘要翻译： 描述了形成新型陶瓷复合材料的方法。 所公开的方法允许新颖的复合设计，包括具有包含不同材料的区域的复合材料。 此外，所公开的方法允许制造具有不同类型材料的体积分数梯度的复合材料。 可以形成具有精细尺寸微结构的复合材料。
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公开(公告)号：US6004500A
公开(公告)日：1999-12-21
申请号：US81308
申请日：1998-05-19
申请人： Ahmad Safari , Victor F. Janas , Amit Bandyopadhyay , Rajesh K. Panda , Mukesh Agarwala , Stephen C. Danforth
发明人： Ahmad Safari , Victor F. Janas , Amit Bandyopadhyay , Rajesh K. Panda , Mukesh Agarwala , Stephen C. Danforth
CPC分类号： H01L41/37 , H01L41/183
摘要： A process for making ceramic composites includes the steps of: a) forming a polymer composition into a three-dimensional mold; b) filling said three-dimensional mold with one or more ceramic containing compositions; c) heating said filled mold to dry and sinter the ceramic; d) removing at least a portion of said three-dimensional mold thereby forming voids; and e) filling the voids with a second composition which has a piezoelectric coefficient which is substantially different from the piezoelectric coefficient of said ceramic structure. Steps a through e yield a controlled, non-random piezoelectric ceramic composite having 2-3, 3-2 or 3--3 connectivity with respect to the sintered ceramic and the second composition throughout the composite.
摘要翻译： 制备陶瓷复合材料的方法包括以下步骤：a）将聚合物组合物形成为三维模具; b）用一种或多种含陶瓷的组合物填充所述三维模具; c）加热所述填充的模具以干燥并烧结陶瓷; d）去除所述三维模具的至少一部分，从而形成空隙; 以及e）用具有与所述陶瓷结构的压电系数基本不同的压电系数的第二组合物填充所述空隙。 步骤a至e产生相对于烧结陶瓷和第二组合物在整个复合材料中具有2-3，3-2或3-3连通性的受控非随机压电陶瓷复合材料。
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公开(公告)号：US5796207A
公开(公告)日：1998-08-18
申请号：US847901
申请日：1997-04-28
CPC分类号： H01L41/18 , H01L41/183
摘要： This invention relates to novel oriented piezoelectric ceramic and ceramic/polymer composites. More particularly, it provides a novel piezoelectric composite design wherein the ceramic piezoelectric phase is oriented at an angle with respect to the direction of applied stress, thus giving improved electromechanical properties.
摘要翻译： 本发明涉及新型取向压电陶瓷和陶瓷/聚合物复合材料。 更具体地，它提供了一种新颖的压电复合材料设计，其中陶瓷压电相位相对于所施加的应力方向成一定角度定向，从而提供改善的机电性能。
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公开(公告)号：US5997795A
公开(公告)日：1999-12-07
申请号：US86847
申请日：1998-05-29
IPC分类号： B29C33/38 , B29C67/00 , C04B38/00 , C30B5/00 , G02B6/122 , B29C35/08 , B29C41/02 , C04B35/00
CPC分类号： B29C67/0081 , B29C33/3842 , B29C67/0062 , B29C67/0092 , B82Y20/00 , C04B38/00 , C30B29/60 , C30B5/00 , G02B6/1225 , C04B2111/00181
摘要： Solid freeform fabrication techniques are used in direct methods to form photonic bandgap structures, and in indirect methods to form molds for photonic bandgap structures. In the direct methods, solid particulate materials are mixed with a binder and, through a computer-controlled process, are built layer by layer to form the structure. In the indirect methods, unfilled polymeric materials are built layer by layer to form a negative mold for the photonic bandgap structure. The cavities within the mold may then be filled with a slurry incorporating solid particulate materials. Subsequent processing may include mold removal, binder removal, densification and secondary infiltration steps to form a photonic bandgap structure having the desired properties.
摘要翻译： 固体自由形成技术用于形成光子带隙结构的直接方法，以及用于形成光子带隙结构的模具的间接方法。 在直接方法中，将固体颗粒材料与粘合剂混合，并通过计算机控制的方法逐层地构建以形成结构。 在间接方法中，未填充的聚合物材料逐层地构建，以形成用于光子带隙结构的负模具。 然后可以用包含固体颗粒材料的浆料填充模具内的空腔。 随后的处理可以包括脱模，粘合剂去除，致密化和二次渗透步骤以形成具有期望性质的光子带隙结构。
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公开(公告)号：US5738817A
公开(公告)日：1998-04-14
申请号：US598276
申请日：1996-02-08
申请人： Stephen C. Danforth , Mukesh Agarwala , Amit Bandyopadghyay , Noshir Langrana , Vikram R. Jamalabad , Ahmad Safari , Remco van Weeren
发明人： Stephen C. Danforth , Mukesh Agarwala , Amit Bandyopadghyay , Noshir Langrana , Vikram R. Jamalabad , Ahmad Safari , Remco van Weeren
CPC分类号： B29C67/0081 , B29C41/36 , D01F1/10
摘要： A fused deposition process is used to form three-dimensional solid objects from a mixture including a particulate composition dispersed in a binder. The article is formed by depositing the mixture in repeated layers of predefined thickness, with each layer solidifying before the next adjacent layer is dispensed. Following formation and a binder removal step, the article may be at least partially densified to achieve preselected properties. The process permits three-dimensional articles to be formed relatively quickly and inexpensively, without the need for molds or other tooling.
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公开(公告)号：US5900207A
公开(公告)日：1999-05-04
申请号：US858965
申请日：1997-05-20
申请人： Stephen C. Danforth , Mukesh Agarwala , Amit Bandyopadghyay , Noshir Langrana , Vikram R. Jamalabad , Ahmad Safari , Remco van Weeren , William R. Priedeman, Jr.
发明人： Stephen C. Danforth , Mukesh Agarwala , Amit Bandyopadghyay , Noshir Langrana , Vikram R. Jamalabad , Ahmad Safari , Remco van Weeren , William R. Priedeman, Jr.
CPC分类号： B29C67/0081 , B29C41/36 , D01F1/10
摘要： A fused deposition process is used to form three-dimensional solid objects from a mixture including a particulate composition dispersed in a binder. The article is formed by depositing the mixture in repeated layers of predefined thickness, with each layer solidifying before the next adjacent layer is dispensed. Following formation and a binder removal step, the article may be at least partially densified to achieve preselected properties. The process permits three-dimensional articles to be formed relatively quickly and inexpensively, without the need for molds or other tooling.
摘要翻译： 使用熔融沉积工艺从包含分散在粘合剂中的颗粒组合物的混合物形成三维固体物体。 通过以预定厚度的重复层沉积混合物形成制品，每层在分配下一相邻层之前固化。 在形成和粘合剂去除步骤之后，制品可以至少部分致密化以实现预选的性质。 该方法允许三维制品相对快速和廉价地形成，而不需要模具或其它工具。
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公开(公告)号：US5539965A
公开(公告)日：1996-07-30
申请号：US263564
申请日：1994-06-22
申请人： Ahmad Safari , Victor F. Janas
发明人： Ahmad Safari , Victor F. Janas
CPC分类号： H01L41/37 , B06B1/06 , H01L41/183 , H01L41/1875 , Y10T29/42
摘要： A process for forming piezoelectric composites allows for novel composite designs, including composites with different polarizable material regions and composites with a gradient in volume fraction of polarizable material. Composites with fine-scale microstructures may be formed. The new forming method is an improvement to the traditional "dice and fill" technique currently being utilized to form piezoelectric composites.
摘要翻译： 用于形成压电复合材料的方法允许新颖的复合设计，包括具有不同可极化材料区域的复合材料和具有可极化材料体积分数梯度的复合材料。 可以形成具有精细尺寸微结构的复合材料。 新的成型方法是对目前用于形成压电复合材料的传统“骰子和填充”技术的改进。
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9.发明授权Method of detecting sound in water using piezoelectric-polymer composites with 0-3 connectivity 失效使用具有0-3连通性的压电 - 聚合物复合材料检测水中声音的方法
公开(公告)号：US4977547A
公开(公告)日：1990-12-11
申请号：US271579
申请日：1988-11-15
IPC分类号： H01L41/18
CPC分类号： H01L41/1878 , H01L41/183
摘要： A hydrophone device is provided with a piezoelectric ceramic-polymer composite of 0-3 connectivity in which the piezoelectric filler comprises a solid solution of PBTiO.sub.3 -BiFeO.sub.3 wherein the solid solution contains 50-80 wt. % of the BiFeO.sub.3. The piezoelectric ceramic-polymer composite has large hydrostatic piezoelectric charge and voltage coefficients which are desirable in hydrophone devices.
摘要翻译： 水听器装置具有0-3连通性的压电陶瓷 - 聚合物复合材料，其中压电填料包括PBTiO3-BiFeO3的固溶体，其中固溶体含有50-80wt。 ％的BiFeO3。 压电陶瓷 - 聚合物复合材料在水听器装置中具有较大的静压压电荷和电压系数。
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公开(公告)号：US4726099A
公开(公告)日：1988-02-23
申请号：US908422
申请日：1986-09-17
申请人： Roger J. Card , Michael P. O'Toole , Ahmad Safari
发明人： Roger J. Card , Michael P. O'Toole , Ahmad Safari
摘要： Piezoelectric ceramic polymer matrices, piezoelectric composites, and methods of make the matrices and composites are disclosed.
摘要翻译： 公开了压电陶瓷聚合物基体，压电复合材料和制备基体和复合材料的方法。
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