Tuning the flash sintering characteristics of ceria with MnCo2O4

被引：14

作者：

Gaur, Anshu ^{[1
]}

Sglavo, Vincenzo M. ^{[1
]}

机构：

[1] Univ Trento, Dept Ind Engn, Via Sommar 9, I-38123 Trento, Italy

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2018年 / 228卷

关键词：

Flash sintering; MnCo2O4 and CeO2; Microstructure; Electrical conductivity; I-V curve; GADOLINIA-DOPED CERIA; YTTRIA-STABILIZED ZIRCONIA; ELECTRIC-FIELD; CONDUCTIVITY; ALUMINA; DENSIFICATION; CERAMICS; TITANATE; BEHAVIOR; PHASE;

D O I：

10.1016/j.mseb.2017.11.026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of MnCo2O4 on the electric field assisted flash sintering of CeO2 is demonstrated. CeO2 being a refractory material sinters, conventionally, at very high temperature (similar to 1500 degrees C) and with the assistance of 120-150 V/cm at 890-962 degrees C. A conducting MnCo2O4 which is flash sintered at lower temperatures (200-230 degrees C), by utilizing fields in the range of 12.5-15.0 V/cm is added to ceria to reduce its sintering processing parameters. MnCo2O4 percentage in the composite is varied to understand the significance of the constituent phases during the flash sintering. The extent of sintering along with the phase distribution in the composites is evaluated on the basis of scanning electron microscopy study in backscattered electron mode. Role of the two phases in the flash-effect is emphasized by the measurement of flash threshold parameters, I-V characteristics and specimen temperature during flash sintering.

引用

页码：160 / 166

页数：7

共 35 条

[1] Preliminary investigation of hydroxyapatite microstructures prepared by flash sintering
Bajpai, Indu
Han, Young-Hwan
Yun, Jondo
Francis, John
Kim, Sukyoung
Raj, Rishi
[J]. ADVANCES IN APPLIED CERAMICS, 2016, 115 (05) : 276 - 281
[2] BELYAEV AE, 1990, JETP LETT+, V51, P186
[3] Theoretical and phenomenological analogies between flash sintering and dielectric breakdown in α-alumina
Biesuz, Mattia
Luchi, Piero
Quaranta, Alberto
Sglavo, Vincenzo M.
[J]. JOURNAL OF APPLIED PHYSICS, 2016, 120 (14)
[4] Flash sintering of alumina: Effect of different operating conditions on densification
Biesuz, Mattia
Sglavo, Vincenzo M.
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2016, 36 (10) : 2535 - 2542
[5] Cation distribution in manganese cobaltite spinels Co3-x Mn x O4 (0 aparts per thousandcurrency sign x aparts per thousandcurrency sign 1) determined by thermal analysis
Bordeneuve, H.
Rousset, A.
Tenailleau, C.
Guillemet-Fritsch, S.
[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2010, 101 (01) : 137 - 142
[6] Field assisted and flash sintering of alumina and its relationship to conductivity and MgO-doping
Cologna, Marco
Francis, John S. C.
Raj, Rishi
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2011, 31 (15) : 2827 - 2837
[7] Flash-Sintering of Cubic Yttria-Stabilized Zirconia at 750°C for Possible Use in SOFC Manufacturing
Cologna, Marco
Prette, Andre L. G.
Raj, Rishi
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2011, 94 (02) : 316 - 319
[8] Flash Sintering of Nanograin Zirconia in <5 s at 850°C
Cologna, Marco
Rashkova, Boriana
Raj, Rishi
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2010, 93 (11) : 3556 - 3559
[9] Predicting the Onset of Flash Sintering
Dong, Yanhao
Chen, I-Wei
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2015, 98 (08) : 2333 - 2335
[10] Distinction between the Poole-Frenkel and tunneling models of electric-field-stimulated carrier emission from deep levels in semiconductors
Ganichev, SD
Ziemann, E
Prettl, W
Yassievich, IN
Istratov, AA
Weber, ER
[J]. PHYSICAL REVIEW B, 2000, 61 (15): : 10361 - 10365

← 1 2 3 4 →