Synthesis and Characterizations of Novel Ca-Mg-Ti-Fe-Oxides Based Ceramic Nanocrystals and Flexible Film of Polydimethylsiloxane Composite with Improved Mechanical and Dielectric Properties for Sensors

Armalcolite, a rare ceramic mineral and normally found in the lunar earth, was synthesized by solid-state step-sintering. The in situ phase-changed novel ceramic nanocrystals of Ca-Mg-Ti-Fe based oxide (CMTFOx), their chemical reactions and bonding with polydimethylsiloxane (PDMS) were determined by X-ray diffraction, infrared spectroscopy, and microscopy. Water absorption of all the CMTFOx was high. The lower dielectric loss tangent value (0.155 at 1 MHz) was obtained for the ceramic sintered at 1050 °C (S1050) and it became lowest for the S1050/PDMS nanocomposite (0.002 at 1 MHz) film, which was made by spin coating at 3000 rpm. The excellent flexibility (static modulus ≈ 0.27 MPa and elongation > 90%), viscoelastic property (tanδ = E″/E′: 0.225) and glass transition temperature (Tg: −58.5 °C) were obtained for S1050/PDMS film. Parallel-plate capacitive and flexible resistive humidity sensors have been developed successfully. The best sensing performance of the present S1050 (3000%) and its flexible S1050/PDMS composite film (306%) based humidity sensors was found to be at 100 Hz, better than conventional materials.

[1]  G. Cui,et al.  Interface engineering for high-performance perovskite hybrid solar cells , 2015 .

[2]  Longtu Li,et al.  BaTiO3–BiYbO3 perovskite materials for energy storage applications , 2015 .

[3]  M. Willander,et al.  Excellent humidity sensing properties of cadmium titanate nanofibers , 2013 .

[4]  Jacques Persello,et al.  Melt and glass crystallization of PDMS and PDMS silica nanocomposites. , 2014, Physical chemistry chemical physics : PCCP.

[5]  Noor Azuan Abu Osman,et al.  Endothelial cell responses in terms of adhesion, proliferation, and morphology to stiffness of polydimethylsiloxane elastomer substrates. , 2015, Journal of biomedical materials research. Part A.

[6]  H. S. Wolff,et al.  iRun: Horizontal and Vertical Shape of a Region-Based Graph Compression , 2022, Sensors.

[7]  Characterization of frequency-dependent glass transition temperature by Vogel?Fulcher relationship , 2008 .

[8]  S. Nair,et al.  Structural , magnetic and electrical properties of the sol-gel prepared Li 0 . 5 Fe 2 . 5 O 4 fine particles , 2006 .

[9]  V. Bondarenka,et al.  Thin films of poly-vanadium-molybdenum acid as starting materials for humidity sensors , 1995 .

[10]  B. Ang,et al.  Phase and surface area studies of maghemite nanoparticles dispersed in silica gel , 2014 .

[11]  Enrc J. EssnNn,et al.  Armalcolite in crustal paragneiss xenoliths , central Mexico , 2007 .

[12]  A. Rudajevová,et al.  Thermal properties of the plasma-sprayed MgTiO3–CaTiO3 and CaTiO3 , 2002 .

[13]  A. Rai,et al.  Dielectric properties of CaCu3Ti4−xCoxO12 (x = 0.10, 0.20, and 0.30) synthesized by semi-wet route , 2010 .

[14]  Belinda Pingguan-Murphy,et al.  In Vitro Study of Surface Modified Poly(ethylene glycol)-Impregnated Sintered Bovine Bone Scaffolds on Human Fibroblast Cells , 2015, Scientific Reports.

[15]  P. Su,et al.  Flexible humidity sensor based on TiO2 nanoparticles-polypyrrole-poly-[3-(methacrylamino)propyl] trimethyl ammonium chloride composite materials , 2008 .

[16]  R. Morris,et al.  Spectral and other physicochemical properties of submicron powders of hematite (alpha-Fe2O3), maghemite (gamma-Fe2O3), magnetite (Fe3O4), goethite (alpha-FeOOH), and lepidocrocite (gamma-FeOOH). , 1985, Journal of geophysical research.

[17]  Noor Azuan Abu Osman,et al.  Morphological Change of Heat Treated Bovine Bone: A Comparative Study , 2012, Materials.

[18]  Chien-Tsung Wang,et al.  Humidity sensors based on silica nanoparticle aerogel thin films , 2005 .

[19]  Belinda Pingguan-Murphy,et al.  Design and Development of Potential Tissue Engineering Scaffolds from Structurally Different Longitudinal Parts of a Bovine-Femur , 2014, Scientific Reports.

[20]  Hiroyuki Fujita,et al.  Polydimethylsiloxane membranes for millimeter-wave planar ultra flexible antennas , 2006 .

[21]  Jarno Salonen,et al.  Characterization of thermally carbonized porous silicon humidity sensor , 2004 .

[22]  Yuuki Yazawa,et al.  Lunar Minerals and Their Resource Utilization with Particular Reference to Solar Power Satellites and Potential Roles for Humic Substances for Lunar Agriculture , 2012 .

[23]  R. Xiong,et al.  Low temperature fabrication of the giant dielectric material CaCu(3)Ti(4)O(12) by oxalate coprecipitation method , 2009 .

[24]  Denis Donlagic,et al.  Sensor for high-air-humidity measurement , 1996 .

[25]  Harith Ahmad,et al.  All-Optical Graphene Oxide Humidity Sensors , 2014, Sensors.

[26]  G. Neumann,et al.  The lunar moho and the internal structure of the Moon: A geophysical perspective , 2013 .

[27]  Yi Hu,et al.  Effect of the MgO substitution for CuO on the properties of CaCu3Ti4O12 ceramics , 2012 .

[28]  V. Matko,et al.  Temperature-compensated capacitance–frequency converter with high resolution , 2014 .

[29]  T. Troczynski,et al.  Sol–gel BaTiO3 thin film for humidity sensors , 2003 .

[30]  T. Sekino,et al.  Practical microwave-induced hydrothermal synthesis of rectangular prism-like CaTiO3 , 2013 .

[31]  Z. M. Rittersma,et al.  Recent achievements in miniaturised humidity sensors—a review of transduction techniques , 2002 .

[32]  Hyunchul Park,et al.  Capacitive humidity sensor design based on anodic aluminum oxide , 2009 .

[33]  Belinda Pingguan-Murphy,et al.  Developments of Immobilized Surface Modified Piezoelectric Crystal Biosensors for Advanced Applications , 2013, International Journal of Electrochemical Science.

[34]  Tarikul Islam,et al.  A micro interdigitated thin film metal oxide capacitive sensor for measuring moisture in the range of 175–625 ppm , 2015 .

[35]  D. Mergel,et al.  Frequency and temperature-dependent dielectric properties of BaTiO3 thin film capacitors studied by complex impedance spectroscopy , 2007 .

[36]  K. T. Varughese,et al.  Dielectric properties of Poly(vinylidene fluoride)/CaCu3Ti4O12 composites , 2010, 1301.4054.

[37]  W. Wang,et al.  Capacitive humidity-sensing properties of Zn2SiO4 film grown on silicon nanoporous pillar array , 2013 .

[38]  R. Shneck,et al.  Metastable magnesium titanate phases synthesized in nanometric systems , 1997 .

[39]  Jongman Cho,et al.  Role of Morphological Structure, Doping, and Coating of Different Materials in the Sensing Characteristics of Humidity Sensors , 2014, Sensors.

[40]  L. Greenspan.  Humidity Fixed Points of Binary Saturated Aqueous Solutions , 1977, Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry.

[41]  Vojko Matko,et al.  Next Generation AT-Cut Quartz Crystal Sensing Devices , 2011, Sensors.

[42]  Yaming Wang,et al.  Structure of calcium titanate/titania bioceramic composite coatings on titanium alloy and apatite deposition on their surfaces in a simulated body fluid , 2007 .

[43]  Laxman Singh,et al.  Effect of processing routes on microstructure, electrical and dielectric behavior of Mg-doped CaCu3Ti4O12 electro-ceramic , 2013 .

[44]  Quanfang Chen,et al.  Influences of heating temperature on mechanical properties of polydimethylsiloxane , 2009 .

[45]  W. C. Gan,et al.  The structural and electrical properties of SrxBa(1−x)Nb2O6 (SBN) ceramic with varied composition , 2015 .

[46]  Ding-Yeong Wang,et al.  Synthesis and Characterization of Ilmenite-Type Cobalt Titanate Powder , 2010 .

[47]  V. Matko.  Porosity determination by using two stochastic signals , 2004 .

[48]  S. Nair,et al.  Structural, magnetic and electrical properties of the sol-gel prepared Li0.5Fe2.5O4 fine particles , 2006 .

[49]  Karen Maex,et al.  Low dielectric constant materials for microelectronics , 2003 .

[50]  Yun‐Sung Lee,et al.  Electrical and magnetic behaviour of nanostructured MgFe2O4 spinel ferrite , 2010 .

[51]  Liqun Zhang,et al.  Design and synthesis of non-crystallizable, low-Tg polysiloxane elastomers with functional epoxy groups through anionic copolymerization and subsequent epoxidation , 2014 .

[52]  Jing Wang,et al.  Properties of a nanocrystalline barium titanate on silicon humidity sensor , 2003 .

[53]  P. C. Hess,et al.  The stability and major element partitioning of ilmenite and armalcolite during lunar cumulate mantle overturn , 2009 .

[54]  Xin Zhang,et al.  Dielectric constants of PDMS nanocomposites using conducting polymer nanowires , 2011, 2011 16th International Solid-State Sensors, Actuators and Microsystems Conference.

[55]  Jian Zhang,et al.  Humidity sensing behavior of silicon nanowires with hexamethyldisilazane modification , 2011 .

[56]  Jeppe C. Dyre,et al.  Universality of ac conduction in disordered solids , 2000 .

[57]  T. K. Chaki,et al.  Development of polyurethane–titania nanocomposites as dielectric and piezoelectric material , 2013 .

[58]  Mihail Mihaylov,et al.  Dynamic mechanical thermal analysis and dielectric thermal analysis of siloxane rubber-based composites filled with carbon black , 2012 .