Synthesis of zirconium titanate with an ordered M-fergusonite (beta) structure

Troitzsch, Ulrike; Christy, Andrew G.; Ellis, David J.

doi:10.1016/j.jssc.2007.08.020

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…However, stoichiometry of this phase cannot be stated based on it result. As it was mentioned above, in the works of Troizch et al, where these two types of ordered phases were observed, the phases were grown from the melt using flux growth method.…”

Section: Resultsmentioning

confidence: 99%

“…In the works of Troitzsch et al, about 5 wt% of a flux, CuO or ammonium carbonate mixture was also added to samples in order to obtain ordered phases. According to Troitzsch et al, the only sample that did not contain flux in the starting mix did not equilibrate completely due to sluggish kinetics and difficulty in performing experiments at relatively low temperatures (below 1473 K). In the work of Bordet et al, the samples of the Zr 5 Ti 7 O 24 compound were prepared by solid‐state reaction of the appropriate amounts of high‐purity Y 2 O 3 , TiO 2 , and ZrO 2 in the ration of 41.25 at% of ZrO 2 , 57.75 at.% of TiO 2 and 1 at.% of Y 2 O 3 .…”

Section: Literature Surveymentioning

confidence: 99%

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Experimental investigation of phase relations and thermodynamic properties in the ZrO₂–TiO₂ system

et al. 2017

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Phase relations in the ZrO 2 -TiO 2 system were studied experimentally using X-ray diffraction (XRD), scanning electron microscopy combined with dispersive X-ray spectrometry (SEM/EDX) and differential thermal analysis (DTA). The homogeneity ranges of ZrO 2 and TiO 2 , as well as high temperature disordered b-(Zr x Ti 1Àx ) 2 O 4 compound were defined in the temperature range of 1700-2040 K. Temperature and composition of eutectic reaction were measured. The standard enthalpy of formation of the b-ZrTiO 4 compound was obtained using high-temperature oxide-melt solution calorimetry. High temperature heat capacity measurement for the b-ZrTiO 4 compound was performed in the temperature range from 250 K to 1200 K. Thermodynamic description of ZrO 2 -TiO 2 system has been derived based on obtained experimental results and data from literature. K E Y W O R D SGibbs energy of formation, modeling/model, phase equilibria, thermal analysis, thermodynamics 1 | INTRODUCTION ZrO 2 -based ceramic materials are widely applied in industry. The b-ZrTiO 4 is well-known compound in the field of electro-ceramics where it is used in the dielectric resonators and devices for telecommunications.1 b-ZrTiO 4 shows anisotropic thermal expansion and therefore has potential as thermal shock resistance application. In the work of L opez-L opez et al 1 the thermomechanical properties of this compound were investigated and it was proposed for application as a constituent of thermal shock resistance materials. It should be mentioned, materials based on the ZrO 2 -TiO 2 system are of interest due to their applications in electrical and optical devices such as capacitors, piezoelectric sensors, ultrasonic motors, and microwave dielectric resonators. [2][3][4][5][6][7] It is also useful as high-temperature pigments and bi-functional catalyst. 8,9The materials based on Al 2 TiO 5 -ZrTiO 4 -ZrO 2 system are new promising kinds of ceramic composite material with low thermal expansion coefficient and high-temperature stability. 10 The system ZrO 2 -TiO 2 is part of the ZrO 2 -Y 2 O 3 -TiO 2 system which presents interest for thermal barrier coating applications. It was shown that co-doping of ZrO 2 with Y 2 O 3 and TiO 2 resulted in strong stabilization of tetragonal modification of YSZ (Yttria Stibilized Zirconia) which is used as TBC (Thermal Barrier Coating). 11The phase relations in the ZrO 2 -TiO 2 system are important for application in metal matrix composite. High alloyed ductile TRIP-steel (Transformation Induced Plasticity) exhibited extraordinary high values of specific energy absorption due to reinforcing by Mg-PSZ-ceramic (MgO Partially Stabilized Zirconia).12 Since, the Mg-PSZ-ceramic shows a martensitic transformation of tetragonal to monoclinic phase during deformation resulting in additional strength increase in the TRIP-steel. 13 In the work of Weigelt et al, 14 it was shown, that a minor addition of titanium improves the densification of the matrix material and the bonding between the zirconia particles and the TRIP steel ma...

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Section: Resultsmentioning

confidence: 99%

Section: Literature Surveymentioning

confidence: 99%

Experimental investigation of phase relations and thermodynamic properties in the ZrO₂–TiO₂ system

et al. 2017

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“…In order to accelerate the reaction rate, various fluxes such as water, ammonium carbonate, lithium molybdate mixtures, and copper oxide have been tried by the authors in the past [4][5][6][7][8]. In these previous studies, the addition of 5 to 10 wt% CuO to the ZrO 2 -TiO 2 oxide starting mixes resulted in formation of the desired intermediate compounds even below 1200 1C at atmospheric as well as higher pressures, thus allowing for phase equilibrium studies, as well as the synthesis of targeted ceramic compositions in the ZrO 2 -TiO 2 system at this relatively low temperature [4,5,8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and crystal structure of CuZrTiO5—A new crystal structure type

Troitzsch

Christy

Willis

et al. 2010

Journal of Solid State Chemistry

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a b s t r a c tA new compound, CuZrTiO 5 , was synthesized as strongly pleochroic green crystals from the oxides between 995 and 1010 1C, 1 atm. Its crystal structure was determined by single crystal XRD, resulting in R (F 2 42s(F 2 ))= 0.032 and wR (all data)= 0.079). CuZrTiO 5 is orthorhombic, space group P2 1 2 1 2 1 , a =3.5871(3)Å, b =6.6968(4)Å, c= 14.6679(9)Å, V =352.35(4)Å 3 , Z =4. The structure is topologically similar to In 2 TiO 5 but differs in space group and cation coordination. CuZrTiO 5 has relatively regular TiO 6 polyhedra, but coordination is 7 +1 for Zr, and 4 +2 for Cu due to the Jahn-Teller effect. Ordering of the long Cu-O bonds causes reduction in symmetry relative to In 2 TiO 5 . Layers of Cu alternate with Ti +Zr on (001), giving rise to a distinct cleavage. Bond valence sums on Ti and Zr are far from ideal, which appears due to the limited ability of this structural topology to avoid close next-nearest neighbour distances.

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ChemInform Abstract: Synthesis of Zirconium Titanate with an Ordered M‐Fergusonite (Beta) Structure.

2008

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Synthesis of Zirconium Titanate with an Ordered M-Fergusonite (Beta) Structure. -(Zr,Ti)O 2 with 27.5-35 mol% TiO 2 is prepared from mixtures of ZrO 2 and TiO2 (35-38 kbar, 1400-1500°C, 9-24 h) and characterized by TEM and powder XRD. The monoclinic structure (space group C2/c, Z = 4) is related to that of M-fergusonite (beta), with site A occupied predominantly with Zr and site B with a random mix of Ti and Zr. Superstructure refinements result in the splitting of site B into two distinct sites (space group C2). -(TROITZSCH*, U.; CHRISTY, A. G.; ELLIS, D. J.;

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Synthesis of zirconium titanate with an ordered M-fergusonite (beta) structure

Cited by 9 publications

References 32 publications

Experimental investigation of phase relations and thermodynamic properties in the ZrO₂–TiO₂ system

Experimental investigation of phase relations and thermodynamic properties in the ZrO₂–TiO₂ system

Synthesis and crystal structure of CuZrTiO5—A new crystal structure type

ChemInform Abstract: Synthesis of Zirconium Titanate with an Ordered M‐Fergusonite (Beta) Structure.

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Synthesis of zirconium titanate with an ordered M-fergusonite (beta) structure

Cited by 9 publications

References 32 publications

Experimental investigation of phase relations and thermodynamic properties in the ZrO2–TiO2 system

Experimental investigation of phase relations and thermodynamic properties in the ZrO2–TiO2 system

Synthesis and crystal structure of CuZrTiO5—A new crystal structure type

ChemInform Abstract: Synthesis of Zirconium Titanate with an Ordered M‐Fergusonite (Beta) Structure.

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Experimental investigation of phase relations and thermodynamic properties in the ZrO₂–TiO₂ system

Experimental investigation of phase relations and thermodynamic properties in the ZrO₂–TiO₂ system