Effect of additives and powder preparation techniques on PTCR properties of barium titanate

Chatterjee, Shovon; Stojanovic, B. D.; Maiti, Himadri Sekhar

doi:10.1016/s0254-0584(02)00381-4

Cited by 29 publications

(10 citation statements)

References 23 publications

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“…Here, the particle size and shape play an important role [9,10]. Untreated BTO powder is mostly a non-flowable material with a mean grain size of a few microns, so that a preparation of the material (in the form of heat treatment) or an addition of flow additives is necessary [6,11]. Therefore, this study uses a calcined BTO on the one hand and on the other hand an untreated BTO is used to which flow additives are added in order to remove powder agglomerations and increase the flowability.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies on 3D printing of barium titanate ceramics for medical applications

Schult

Buckow

Seitz

2016

Current Directions in Biomedical Engineering

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Abstract:The present work deals with the 3D printing of porous barium titanate ceramics. Barium titanate is a biocompatible material with piezoelectric properties. Due to insufficient flowability of the starting material for 3D printing, the barium titanate raw material has been modified in three different ways. Firstly, barium titanate powder has been calcined. Secondly, flow additives have been added to the powder. And thirdly, flow additives have been added to the calcined powder. Finally, a polymer has been added to the three materials and specimens have been printed from these three material mixtures. The 3D printed parts were then sintered at 1320°C. The sintering leads to shrinkage which differs between 29.51-71.53% for the tested material mixtures. The porosity of the parts is beneficial for cell growth which is relevant for future medical applications. The results reported in this study demonstrate the possibility to fabricate porous piezoelectric barium titanate parts with a 3D printer that can be used for medical applications. 3D printed porous barium titanate ceramics can especially be used as scaffold for bone tissue engineering, where the bone formation can be promoted by electrical stimulation.

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Section: Introductionmentioning

confidence: 99%

Experimental studies on 3D printing of barium titanate ceramics for medical applications

Schult

Buckow

Seitz

2016

Current Directions in Biomedical Engineering

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“…Conventional processes (for example, solid-state synthesis [1][2][3] and coprecipitation [4,5]) often give rise to BaTiO 3 powder in the range of micrometer due to high temperature calcinations, and cannot satisfy the growing demands for miniaturization B. Hou · Z. Li · Y. Xu · D. Wu · Y. Sun ( ) State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China email: yhsun@sxicc.ac.cn B. Hou · Z. Li Graduate School of the Chinese Academy of Sciences, Beijing, 100039, China of electronic device and downsizing of electronic components.…”

Section: Introductionmentioning

confidence: 99%

Size-controllable barium titanate nanopowder synthesized via one-pot solvothermal route in a mixed solvent

Hou

Xü

et al. 2006

J Electroceram

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Barium titanate nanopowder was synthesized via solvothermal route using water-ethanol-ethylene glycol monomethyl ether as mixed solvent and TiCl 4 -Ba(OH) 2 · 8H 2 O as precursors. The effects of water amount in a mixed solvent, synthetic temperature and reaction time on microstructure and particle size of the as-prepared barium titanate powder were investigated systematically. The results show that the particle size of barium titanate powder could be tuned by varying the synthetic parameters. The procedure presented here provides a simple route to the preparation of barium titanate nanopowder with controllable particle size.

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“…(9) Chatterjee et al found that after 0.2 mol% donor doping, the electrical resistivity reached 10 -6 -10 -7 S/m. (10) The PMMA-containing samples included 0.3 mol% La 2 O 3 . Thus, they had a high electrical resistance in air atmosphere and a high surface area because of doping.…”

Section: Discussionmentioning

confidence: 99%

Electrical Conductivity and Hysteresis Characteristic of BaTiO3-Based Sensors with Polymethyl metacrylate (PMMA) Pore Former

2013

Sensors and Materials

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Porous barium titanate ceramics were fabricated by the addition of polymethyl metacrylate (PMMA). The effects of PMMA on the microstructure and electrical conductivity of the porous ceramics were investigated. According to thermal analysis, the endothermic reaction occurred at 832.7°C, which corresponds to the orthorhombichexagonal transformation of barium carbonate, and the formation of barium titanate occurred at 1098.6°C. It was found that the porosity increased and the grain size decreased with increasing PMMA mass%. The crystalline structure of barium titanate ceramics was determined to be tetragonal and independent of PMMA content. The electrical conductivity, humidity sensitivity, and hysteresis characteristic of fabricated ceramics changed with relative humidity, porosity, and PMMA content.

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Effect of additives and powder preparation techniques on PTCR properties of barium titanate

Cited by 29 publications

References 23 publications

Experimental studies on 3D printing of barium titanate ceramics for medical applications

Experimental studies on 3D printing of barium titanate ceramics for medical applications

Size-controllable barium titanate nanopowder synthesized via one-pot solvothermal route in a mixed solvent

Electrical Conductivity and Hysteresis Characteristic of BaTiO3-Based Sensors with Polymethyl metacrylate (PMMA) Pore Former

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