Ca-PSZ prepared via polymeric sol–gel route

Mustafa, Emad

doi:10.1016/s0272-8842(99)00044-9

Cited by 12 publications

(5 citation statements)

References 9 publications

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“…Since the tetragonal and cubic phases are unstable at room temperature, attempts were made to stabilize these phases to fully make use of the desired features of ZrO 2 . The most common way for the stabilization of high-temperature ZrO 2 phases involves incorporating a divalent or trivalent cationic species, such as Mg 2+ , Ca 2+ , or Y 3+ . − …”

Section: Introductionmentioning

confidence: 99%

¹⁷O Solid-State NMR Studies of ZrO₂ Nanoparticles

Shen

Wang

et al. 2019

J. Phys. Chem. C

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17 O solid-state NMR spectroscopy was applied to study the structure of monoclinic and tetragonal zirconia nanoparticles with the help of density functional theory calculations for spectral assignments. Although high-temperature 17 O enrichment allows detection of oxygen ions in the "bulk" part of nanoparticles, selective NMR observation of surface oxygen species can be realized using 17 O-labeled water to enrich surface oxygen sites at a relatively low temperature. The high-frequency 17 O NMR resonances arising from lowcoordinated oxygen ions on the surface of monoclinic and tetragonal zirconia nanoparticles were observed for the first time. The results are the basis for further understanding of structure−properties relations of zirconia nanomaterials.

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Section: Introductionmentioning

confidence: 99%

¹⁷O Solid-State NMR Studies of ZrO₂ Nanoparticles

Shen

Wang

et al. 2019

J. Phys. Chem. C

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“…They are prepared by adding electro conductive fillers into the ceramic matrix. Compared to intrinsically conductive ceramics such as SiC, zirconia and LaCrO 3 [13][14][15][16][17], composite conductive ceramics show advantages of simple processing, cheap and ease of mass production. Now it is widely known in many studies that carbon series composite conductive ceramic, using graphite, carbon powder or carbon fibre as conductive phases [18][19][20][21][22][23], has good conductivity and chemical stability, however, commonly exhibits low mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Electrically conductive ceramic composites prepared with printer toner as the conductive phase

Ping

Lü

et al. 2017

Advances in Applied Ceramics

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Conductive ceramic composite was prepared by sintering the mixture of clay and printer toner at 1050°C and in the N 2 atmosphere. The microstructure and mineral phases of the ceramic composite were characterised by SEM, EDX, TG and XRD, and its electrical conductivity and mechanical properties were also investigated. The results show that, in the sintering process, a series of physical and chemical reactions take place, and mineral phases with excellent electrical conductivity, such as metal iron, carbon and Fe-Al solid solution material, are formed. The electrical conductivity mechanism can be explained by the percolation theory. The threshold value for electrical conductive percolation is between 3.5 and 7.0 wt-%. At the content of printer toner 10 wt-%, the volume electrical resistance of the ceramic composite is as low as 8.5 Ω cm, and the composite exhibits excellent flexural strength higher than 14 MPa.

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“…However, manufacturing of nanoscale ceramics is usually quite difficult and requires two strongly related steps: the synthesis of appropriate nanopowders and effective procedures of densification that results in highly dense microstructure with grain size below 100 nm [3]. In the case of calcium oxide stabilized zirconia ceramics several techniques of powder preparation were employed, such as powder mixing [4,5], co-precipitation [6,7], thermal decomposition of metal alkoxides [8], hydrothermal crystallization [9], rapid combustion [10], and citrate technique [11,12].…”

Section: Introductionmentioning

confidence: 99%