Hydrazine-nitrate combustion synthesis of BaCeO3 preceramic powders: structure, morphology and thermophysical properties

2022 ◽  
Author(s):  
M. I. Tenevich ◽  
A. P. Shevchik ◽  
V. I. Popkov
Keyword(s):  
Combustion Synthesis ◽  
Thermophysical Properties ◽  
Structure Morphology ◽  
Hydrazine Nitrate

scholarly journals Hydrazine-nitrate combustion synthesis of BaCeO3 preceramic powders: structure, morphology and thermophysical properties

2021 ◽  
Author(s):  
Maksim Tenevich ◽  
Andrey Pavlovich Shevchik ◽  
Vadim Igorevich Popkov
Keyword(s):  
Thermophysical Properties ◽  
Simultaneous Thermal Analysis ◽  
Combustion Method ◽  
Sintered Sample ◽  
Combustion Products ◽  
Laser Flash ◽  
Barium Cerate ◽  
Hydrazine Nitrate ◽  
Average Size ◽  
The Impact

Abstract In the present work, preceramic nanocrystallite barium cerate (BaCeO3) was successfully synthesized using the hydrazine-nitrate combustion method. Using carbon-free hydrazine (N2H4) as fuel significantly reduced the formation of carbon by-products. Characterization of the as-received powders was performed by XRD, energy-dispersive X-ray spectroscopy (EDXS), scanning electron microscopy (SEM), simultaneous thermal analysis (DTA-TGA) and adsorption-structural analysis (N2, 77 K). Thermophysical properties of the sample annealed at 1000 °С were investigated using laser flash analysis (LFA) in the temperature interval of 1000 °С. As a result of a comprehensive study, the sequence of chemical and phase transformations that lead to the formation of BaCeO3 with a rhombic structure (Pnma, a = 6.2145 Å, b = 8.7776 Å, c = 6.2337 Å) during the thermal processing of combustion products was investigated. It was established that the average size of the obtained nanocrystals is 38 ± 3 nm and that they form micron-sized agglomerates with a specific surface area of the powder of 4.8 m2/g. It was shown that the sintered sample of BaCeO3 is characterized by thermal diffusivity values of 0.28 to 0.20 mm2/s and thermal conductivity values of 0.41 to 0.35 W/mK, depending on temperature. These results, given the impact of porosity on the sample (~ 40%), show very good agreement with the thermophysical characteristics of densely sintered ceramics based on BaCeO3 – a solid oxide electrolyte SOFC. Consequently, the proposed method of hydrazine-nitrate synthesis of BaCeO3 presents itself as a promising approach to obtaining preceramic powders and ceramics in the area of SOFC.

Influence of the type of fuel used for the solution combustion synthesis on the structure, morphology and magnetic properties of nanosized NiFe2O4

2017 ◽  
Vol 700 ◽  
pp. 272-283 ◽  
Author(s):  
Tsvetomila Lazarova ◽  
Milena Georgieva ◽  
Dimitar Tzankov ◽  
Dimitrinka Voykova ◽  
Lyubomir Aleksandrov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Combustion Synthesis ◽  
Solution Combustion Synthesis ◽  
Solution Combustion ◽  
Structure Morphology

Control of the structure, morphology and dielectric properties of bismuth titanate ceramics by praseodymium substitution using an intermediate fuel agent-assisted self-combustion synthesis

2012 ◽  
Vol 47 (9) ◽  
pp. 4019-4027 ◽  
Author(s):  
Warapong Krengvirat ◽  
Srimala Sreekantan ◽  
M. N. Ahmad-Fauzi ◽  
Charoen Chinwanitcharoen ◽  
Go Kawamura ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Combustion Synthesis ◽  
Bismuth Titanate ◽  
Structure Morphology ◽  
Titanate Ceramics

Influences of pH on the structure, morphology and dielectric properties of bismuth titanate ceramics produced by a low-temperature self-combustion synthesis without an additional fuel agent

2012 ◽  
Vol 38 (4) ◽  
pp. 3001-3009 ◽  
Author(s):  
Warapong Krengvirat ◽  
Srimala Sreekantan ◽  
Ahmad-Fauzi Mohd Noor ◽  
Charoen Chinwanitcharoen ◽  
Hiroyuki Muto ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Low Temperature ◽  
Combustion Synthesis ◽  
Bismuth Titanate ◽  
Structure Morphology ◽  
Titanate Ceramics ◽  
Additional Fuel

Thermophysical properties stable and undercooling liquids of carbon

2019 ◽  
pp. 48-53
Author(s):  
А. V. Kostanovskiy ◽  
M. E. Kostanovskaya
Keyword(s):  
Thermophysical Properties

Solution-Combustion Synthesis and Study of : γ-Fe2-xCrxO3(0.75 ≤ x ≤ 1.25) Maghemite-like Materials

2008 ◽  
Author(s):  
Emilio Moran ◽  
Miguel ïngel. Alario-Franco ◽  
Marco L. Garcia-Guaderrama ◽  
Oscar Blanco
Keyword(s):  
Combustion Synthesis ◽  
Solution Combustion Synthesis ◽  
Solution Combustion

DEVELOPMENT OF POLYMER COMPOSITES WITH IMPROVED THERMOPHYSICAL PROPERTIES FOR SHIPBUILDING AND SHIP REPAIR

2019 ◽  
Vol 10 (2) ◽  
pp. 117-134 ◽  
Author(s):  
A. V. Akimov ◽  
A. V. Buketov ◽  
А. А. Sapronov ◽  
Mykola V. Brailo ◽  
S. V. Yakushchenko ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Thermophysical Properties ◽  
Ship Repair
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