Structure and electrical conductivity of porous zirconium titanate ceramics produced by mechanochemical treatment and sintering

Gajović, Andreja; Šantić, Ana; Djerdj, Igor; Tomašić, Nenad; Moguš‐Milanković, Andrea

doi:10.1016/j.jallcom.2008.12.123

Cited by 26 publications

(10 citation statements)

References 19 publications

(46 reference statements)

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“…This proves with higher mole ratios of ZrO 2 TiO 2 the complete transformation of ZrTiO 4 can occur, which as a result might lead to the good mechanical and thermal properties of the sintered porous ceramics. 18) In …”

Section: )mentioning

confidence: 99%

ZrO2–TiO2 porous ceramics from particle stabilized wet foam by colloidal processing

Bhaskar

Park

Lee

et al. 2016

J. Ceram. Soc. Japan

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ZrO 2 TiO 2 porous ceramics recently has been great interest in the dielectric resonator materials, as well as in the fields of preparation of optical devices, and bio materials. This study reveals an approach for the production of micro porous ceramics consisting of TiO 2 and ZrO 2 fabricated by colloidal wet processing. ZrO 2 particles in the colloidal suspension was partially hydrophobized using propyl gallate as an amphiphile, with a suitable pH range. The different mole ratios of the TiO 2 suspension was added to the surface modified ZrO 2 suspension. The contact angle was found to be around 75°with the adsorption free energy of 1.8 © 10 ¹11 2.15 © 10 ¹11 J. The Laplace pressure of about 1.481.24 mPa was determined corresponding to the wet foam stability of about 7680%. The microstructure analysis is done after sintering the dried samples for obtaining the porous ceramics.

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Section: )mentioning

confidence: 99%

ZrO2–TiO2 porous ceramics from particle stabilized wet foam by colloidal processing

Bhaskar

Park

Lee

et al. 2016

J. Ceram. Soc. Japan

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“…Además, el titanato de circonio tiene actividad fotocatalítica [16,17]. También se han descrito aplicaciones del titanato de circonio como pigmento [21] y como sensor de hidrocarburos (metano y propano) [17,22] y de humedad [23].…”

Section: E López-lópez R Moreno C Baudínunclassified

Titanato de circonio: estabilidad termodinámica y expansión térmica

López-López¹,

Moreno²,

Baudin³

2011

Bol. Soc. Esp. Ceram. Vidr.

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El titanato de circonio es un compuesto muy usado en aplicaciones electrocerámicas, aunque también se han descrito aplicaciones en el campo de la catálisis y de los sensores. Dada la anisotropía en la expansión térmica cristalográfica de este compuesto, podría ser planteado como constituyente de componentes estructurales. En general, para asegurar la integridad estructural y la homogeneidad microestructural de una pieza cerámica, es preciso utilizar velocidades de enfriamiento desde la temperatura de fabricación relativamente bajas. Este requerimiento tiene una importancia fundamental en el titanato de circonio, ya que pequeñas variaciones en la composición y en la velocidad de enfriamiento, producen variaciones significativas tanto en la distribución de fases como en la expansión térmica. En este trabajo se revisan los trabajos existentes sobre la estabilidad del titanato de circonio dentro de los sistemas ZrO 2 -TiO 2 y ZrO 2 -TiO 2 -Y 2 O 3 . Se describen las principales discrepancias acerca de las fases compatibles existentes en la bibliografía actual y se discute el posible origen de estas discrepancias. Asimismo, se revisan los datos existentes sobre la expansión térmica cristalográfica de este compuesto. Palabras clave: Diagramas de fases, Reactividad, Propiedades térmicas, Aplicaciones estructurales, Titanato de circonio, sistema ZrO 2 -TiO 2 -Y 2 O 3Zirconium titanate: stability and thermal expansion Zirconium titanate is a well known compound in the field of electroceramics, although it has also been used in catalyst and sensors applications. The crystallographic thermal expansion anisotropy of this compound makes it a potential candidate as constituent of structural components. In general, to assure the structural integrity and microstructural homogeneity of a ceramic piece, relatively low cooling rates from the fabrication temperature are required. This requirement is essential for zirconium titanate because thermal expansion as well as phase distribution is affected by small variations in the composition and cooling rate. This work reviews the available data on the phase equilibrium relationships in the systems ZrO 2 -TiO 2 and ZrO 2 -TiO 2 -Y 2 O 3 . The main discrepancies as well as the possible origins of them are discussed. Additionally, the crystallographic thermal expansion data in the current literature are reviewed. [4,7] son composiciones específicas dentro de esta solución sólida. En los diferentes estudios realizados a presión atmosférica que se describen en este trabajo, se mencionan las composiciones estequiométricas ZrTiO 4 , ZrTi 2 O 6 y Zr 5 Ti 7 O 24 , así como soluciones sólidas de TiO 2 y de ZrO 2 en ZrTiO 4 y ZrTi 2 O 6 . Por ello, si bien la fórmula química (Zr x Ti 1-x ) 2 O 4 describe correctamente todas las posibles composiciones, en este trabajo, por claridad, se utilizará la nomenclatura tradicional empleada para la descripción de las soluciones sólidas: ZrTiO 4 ss y ZrTi 2 O 6 ss.

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“…24) Hertzian fracture tests are commonly linked with energy dissipation as an effect of internal friction in sliding grains, fibers, platelet, or other microstructural elements which bridge the crack. [25][26][27] The direct foaming technique is suitable to prepare porous ceramics with open/closed pores and porous structures with various shape and size. This processing route was used in this study because of its inherent features which is simple, versatile with low cost production.…”

Section: Introductionmentioning

confidence: 99%

Effects of Carbon Fiber on Mechanical Behaviour of Al2O3 Porous Ceramics

Basnet¹,

Lim²,

Lee³

et al. 2019

J. Korean Ceram. Soc

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This study reports the improvement of mechanical properties of Al 2 O 3 porous ceramics from colloidal suspension with the addition of carbon fiber by direct foaming. The initial colloidal suspension of Al 2 O 3 was partially hydrophobized by surfactant to stabilize wet foam with the addition of carbon fiber from 2 to 8 wt% as stabilizer. The influence of carbon fiber on the air content, bubble size, pore size and pore distribution in terms of wet foam stability and physical properties of porous ceramics were discussed. The viscosity of the colloidal suspension was increased giving solid like properties with the increased in carbon fiber content. The mechanical properties of the sintered porous samples were investigated by Hertzian indentation test. The results show the wet foam stability of more than 90% corresponds to compressive loading of 156.48 N and elastic modulus of 57.44 MPa of sintered sample with 8 wt% of carbon fiber content.

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Structure and electrical conductivity of porous zirconium titanate ceramics produced by mechanochemical treatment and sintering

Abstract: High-energy ball milling has been employed for mechanochemical treatment of TiO 2 and ZrO 2

Cited by 26 publications

References 19 publications

ZrO<sub>2</sub>–TiO<sub>2</sub> porous ceramics from particle stabilized wet foam by colloidal processing

ZrO<sub>2</sub>–TiO<sub>2</sub> porous ceramics from particle stabilized wet foam by colloidal processing

Titanato de circonio: estabilidad termodinámica y expansión térmica

Effects of Carbon Fiber on Mechanical Behaviour of Al2O3 Porous Ceramics

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Structure and electrical conductivity of porous zirconium titanate ceramics produced by mechanochemical treatment and sintering

Abstract: High-energy ball milling has been employed for mechanochemical treatment of TiO 2 and ZrO 2

Cited by 26 publications

References 19 publications

ZrO<sub>2</sub>&ndash;TiO<sub>2</sub> porous ceramics from particle stabilized wet foam by colloidal processing

ZrO<sub>2</sub>&ndash;TiO<sub>2</sub> porous ceramics from particle stabilized wet foam by colloidal processing

Titanato de circonio: estabilidad termodinámica y expansión térmica

Effects of Carbon Fiber on Mechanical Behaviour of Al2O3 Porous Ceramics

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Product

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ZrO<sub>2</sub>–TiO<sub>2</sub> porous ceramics from particle stabilized wet foam by colloidal processing

ZrO<sub>2</sub>–TiO<sub>2</sub> porous ceramics from particle stabilized wet foam by colloidal processing