Multilayer bender-type PZT-PZN actuator by co-extrusion process

Yoon, Chang‐Bun; Lee, Seungho; Lee, Sung-Mi; Kim, Hyoun‐Ee

doi:10.1016/j.jeurceramsoc.2005.04.003

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…Furthermore, multilayered structures with alternating mechanical, electrical, or optical properties can enable avariety of functional devices. For example, Yoon et al (2006) coextruded ag reen ceramic composed of binder polymer laden with lead zironate titanate and silver to form a ceramic actuator of alternating piezoelectrically active layers and conductive layers. More recently amicrolayered coextrusion process has been used to generate alternating polymeric layers with different refractive indices to create all-polymer lasers (Mao, et al 2011;Andrews, et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors

Mondy

Mrozek

Rao

et al. 2015

International Polymer Processing

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Multilayer coextrusion is applied to produce at ape containing layers of alternating electrical properties to demonstrate the potential for using coextrusion to manufacture capacitors. To obtain the desired properties, we develop two filled polymer systems, one for conductive layers and one for dielectric layers. We describe numerical models used to help determine the material and processing parameters that impact processing and layer stability. These models help quantify the critical ratios of densities and viscosities of the two layers to maintain stable layers, as well as the effect of increasing the flow rate of one of the two materials. The conducting polymer is based on polystyrene filled with ab lend of low-meltingpoint eutectic metal and nickel particulate filler, as described by Mrozek et al. (2010). The appropriate concentrations of fillers are determined by balancing measured conductivity with processability in at win screw extruder. Based on results of the numerical models and estimates of the viscosity of emulsions and suspensions, ad ielectric layer composed of polystyrene filled with barium titanate is formulated. Despite the fact that the density of the dielectric filler is less than the metallic filler of the conductive phase, as well as rheological measurements that later showed that the dielectric formulation is not an ideal match to the viscosity of the conductive material, the two materials can be successfully coextruded if the flow rates of the two materials are not identical. Am easurable capacitance of the layered structure is obtained. 1I ntroductionMultilayer coextrusion combines multiple polymers into a layered structure to produce composite properties that are not found in asingle polymer. Coextrusion processes have been in use for over 40 years, and multilayered film structures have found commercial application in the area of food and beverage packaging for their barrier properties and as protective coatings (Wagner, 2010). The multilayer coextrusione quipment used here is based on work by Zhao and Macosko (2002). The equipment combines the polymer flows from two single screw extruders into an initial layered structure that then passes through aseries of dies to multiply the number of layers. The first die splits the flow vertically; the two components are stacked and recombined to effectively double the number of layers. As the number of layers is increased in the same die cross-sectional area, the individual layer thickness decreases. This method has successfully been implemented by companies like 3M and Dow to produce multilayered structures of * 20 m ma nd 110 nm, respectively (3M 2005(3M , Dow 2007). In our equipment the initial layered structure consists of 8layers. As aresult, the number of multiplication sections, n, will result in 2 n+3 layers in a1mmtape.

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Section: Introductionmentioning

confidence: 99%

Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors

Mondy

Mrozek

Rao

et al. 2015

International Polymer Processing

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“…The conventional bimorph actuators have a disadvantage that they can usually produce only relatively small output displacements due to the limitation of the maximum control voltage allowed to be applied to an individual piezoelectric layer. Therefore, the concept of smart structures with multiple piezoelectric actuation layers has been developed [16] and implemented recently for practical applications [17][18][19]. Ballas et al [20] derived a general closed-form solution of the constituent equations for piezoelectric multilayer bending actuators using the theorem of minimum potential energy.…”

Section: Introductionmentioning

confidence: 99%

Topology optimization of bending actuators with multilayer piezoelectric material

Kang

Wang

2010

Smart Mater. Struct.

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This paper investigates the topology optimization of bending actuators with multilayer piezoelectric material. In this problem, the distribution of the control voltage and the structural layout of the actuator are optimized simultaneously. Constraints with regard to energy consumption and material volume are imposed on the optimization problem. Numerical techniques for sensitivity analysis are presented and the proposed optimization problem is solved with a gradient-based mathematical programming approach. Illustrative examples are given to demonstrate the potential of the proposed approach.

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Nonconventional Polymers in Ceramic Processing: Thermoplastics and Monomers

Halloran

2013

Ceramics Science and Technology

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Multilayer bender-type PZT-PZN actuator by co-extrusion process

Cited by 7 publications

References 16 publications

Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors

Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors

Topology optimization of bending actuators with multilayer piezoelectric material

Nonconventional Polymers in Ceramic Processing: Thermoplastics and Monomers

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