The effects of the spinodal microstructure on the electrical properties of TiO2–SnO2 ceramics

Chaisan, Wanwilai; Yimnirun, Rattikorn; Ananta, Supon; Cann, David P.

doi:10.1016/j.jssc.2004.11.030

Cited by 17 publications

(16 citation statements)

References 30 publications

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“…Por otro lado, como el método de síntesis utilizado no favorece la descomposición espinoidal, no fue posible determinar si este fenómeno afecta favorable o desfavorablemente la capacidad sensora del sistema. Se deberían considerar temperaturas elevadas de tratamiento térmico de los polvos sintetizados, por tiempos prolongados, para que se evidencie la descomposición espinoidal, tal como se indica en la literatura (30). Estos estudios se realizan actualmente en el laboratorio del grupo CYTEMAC.…”

Section: 5-respuesta Eléctrica De Las Películas Gruesas De Sno 2 -Tunclassified

Respuesta eléctrica de películas gruesas del sistema SnO2-TiO2, conformadas con polvos cerámicos obtenidos a través del método pechini

Montenegro¹,

Cerón²,

Ponce³

et al. 2007

Bol. Soc. Esp. Ceram. Vidr.

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El óxido de estaño, SnO 2 , es el compuesto más utilizado en la fabricación de sensores de gas, principalmente para gases reductores como el CO y H 2 . Dado que la respuesta de estos sensores depende fuertemente de su superficie, es de gran interés desarrollar métodos de síntesis que permitan obtener nanopartículas de estos compuestos para utilizarlas posteriormente en la conformación de películas. En el presente trabajo se describe adecuadamente el método del precursor polimérico utilizado para obtener nanopartículas de SnO 2 -TiO 2 . Los polvos cerámicos obtenidos se caracterizaron mediante ATD/TG, DRX, FTIR, y MEB. Además, se analizó el comportamiento eléctrico de las películas gruesas obtenidas, cuando son expuestas a atmósferas de O 2 y CO. Palabras clave: Respuesta eléctrica, SnO 2 -TiO 2 ; nanopartículas, Pechini. Electrical answer of the SnO 2 -TiO 2 thick films shaping with ceramics powders obtained by Pechini method.Tin oxide is the compound more used in the gas sensor production, mainly to reduce gases like CO and H 2 . Their electrical properties are strongly dependent of its surface. For this is of great importance to synthesize nanoscale tin oxide particles to use they later in the films conformation. The synthesis of SnO 2 -TiO 2 nanoparticles by polymeric precursor method is reported in this work. The particles were characterized by DTA/TG, FT-IR, XRD and SEM. Also, the electrical response of thick films measured under oxygen and carbon monoxide atmospheres is was analyzed.

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Section: 5-respuesta Eléctrica De Las Películas Gruesas De Sno 2 -Tunclassified

Respuesta eléctrica de películas gruesas del sistema SnO2-TiO2, conformadas con polvos cerámicos obtenidos a través del método pechini

Montenegro¹,

Cerón²,

Ponce³

et al. 2007

Bol. Soc. Esp. Ceram. Vidr.

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“…Most two-phase spinodal systems are consist of two phases with similar crystal structures and physical properties, e.g., metallic alloys 11 , SnO 2 -TiO 2 system 14–16 , Al 2 O 3 -Cr 2 O 3 system 17 and AlN-SiC system 18 . This similarity limits the functionality of many decomposed systems.…”

Section: Introductionmentioning

confidence: 99%

Multi-nanolayered VO2/Sapphire Thin Film via Spinodal Decomposition

Sun

Cao

Yue

et al. 2018

Sci Rep

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Coating of VO2-based thin film has been extensively studied for fabricating energy-saving smart windows. One of the most efficient ways for fabricating high performance films is to create multi-nanolayered structure. However, it has been highly challenge to make such layers in the VO2-based films using conventional methods. In this work, a facile two-step approach is established to fabricate multilayered VO2-TiO2 thin films. We first deposited the amorphous thin films upon sputtering, and then anneal them to transform the amorphous phase into alternating Ti- and V-rich multilayered nanostructure via a spinodal decomposition mechanism. In particular, we take advantage of different sapphire substrate planes (A-plane (11–20), R-plane (1–102), C-plane (0001), and M-plane (10-10)) to achieve different decomposition modes. The new approach has made it possible to tailoring the microstructure of the thin films for optimized performances by controlling the disorder-order transition in terms of both kinetic and thermodynamic aspects. The derived thin films exhibit superior optical modulation upon phase transition, significantly reduced transition temperature and hysteresis loop width, and high degradation resistance, these improvements indicate a high potential to be used for fabricating the next generation of energy saving smart windows.

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“…When these two materials are coupled, it is expected that the photogenerated electrons from TiO 2 will be transferred to SnO 2 [10]. Many investigations have found that when these two oxides are coupled by suitable preparation methods, one can optimize their gas sensing or tune other properties required for various applications [4,5,9,[11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Sn and Ti ions are isovalent with the same coordination numbers. However, SnO 2 has a rutile tetragonal crystal structure with no anatase analog [13]. Therefore, research has focused on the synthesis of Ti 1-x Sn x O 2 compounds with the rutile-type structure over the entire range of solid solubility above 1450 °C [13].…”

Section: Introductionmentioning

confidence: 99%

“…However, SnO 2 has a rutile tetragonal crystal structure with no anatase analog [13]. Therefore, research has focused on the synthesis of Ti 1-x Sn x O 2 compounds with the rutile-type structure over the entire range of solid solubility above 1450 °C [13]. These oxides have been prepared in various forms using several methods including sol-gel reactions, co-precipitation, solid-state reactions, and sputtering [8,9,[11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Stabilization of the anatase phase of Ti1−xSnxO2 (x < 0.5) nanofibers

et al. 2010

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We experimentally investigate the stabilization of the anatase phase of Ti 1-x Sn x O 2 (x < 0.5) nanofibers when synthesized by an electrospinning method. The as-spun nanofibers became nano-grained, polycrystalline nanofibers after calcination and the diameters of the nanofibers depend on Sn content. Stabilization of the anatase phase in Ti-rich compositions and incorporation of Sn ions were confirmed by X-ray diffraction, Raman, X-ray absorption near-edge structure, and photoluminescence (PL) spectroscopies. Results from the PL study also demonstrated the tunable nature of the optical properties, with the emission maximum shifting towards higher wavelength with increasing Sn concentration.

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The effects of the spinodal microstructure on the electrical properties of TiO2–SnO2 ceramics

Cited by 17 publications

References 30 publications

Respuesta eléctrica de películas gruesas del sistema SnO<sub>2</sub>-TiO<sub>2</sub>, conformadas con polvos cerámicos obtenidos a través del método pechini

Respuesta eléctrica de películas gruesas del sistema SnO<sub>2</sub>-TiO<sub>2</sub>, conformadas con polvos cerámicos obtenidos a través del método pechini

Multi-nanolayered VO2/Sapphire Thin Film via Spinodal Decomposition

Stabilization of the anatase phase of Ti1−xSnxO2 (x < 0.5) nanofibers

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