研究目的
To compare nano and micro (Bi2O3)1-x-y(Eu2O3)x(Er2O3)y stable crystal ternary structures and to determine a suitable dopant quantity which has high electrical conductivity, good stabilities over a wide operation temperature range and demonstrates low activation energy.
研究成果
The size effect provides relatively good structural stability in intermediate temperature SOFCs (IT-SOFCs); also, the nano-Bi2O3 system has the lowest activation energy and demonstrates high electrical conductivity.
研究不足
The study focuses on the comparison between nano and micro structures of double-doped δ-Bi2O3 but does not explore other doping materials or synthesis methods that might offer better performance.
1：Experimental Design and Method Selection:
Solid-state synthesis techniques were used to synthesize nano and micro (Bi2O3)1-x-y(Eu2O3)x(Er2O3)y double-doped system materials.
2：Sample Selection and Data Sources:
Stoichiometric ratios of oxide micro (1–10 μm) and nano (90–210 nm) particle sized powders of Bi2O3, Eu2O3, and Er2O3 were used.
3：List of Experimental Equipment and Materials:
AXS D8 Advance XRD Bruker diffractometer, digital scanning electron microscopy (SEM) (Leo 440), TG/DTA (Perkin Elmer Diamond), Keithley 2400 source meter, and Keithley 2700 electro meter.
4：Experimental Procedures and Operational Workflow:
The samples were compressed under approximately 8 tons for 20 min to produce 13 mm diameter pellets. The solid-state reactions were conducted by using a porcelain pot and highly sensitive ash furnaces under normal atmospheric conditions.
5：Data Analysis Methods:
The XRD results were crosschecked with the phases determined from the DTA results. The temperature dependent electrical conductivity measurements of the pellet samples were obtained by using the four-point probe DC method (4PPM).
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
AXS D8 Advance XRD Bruker diffractometer
D8 Advance
Bruker
Used to state the structure of the phases.
-
TG/DTA
Diamond
Perkin Elmer
Used to determine the phase transformation temperature, thermal stability and other thermal properties of the pellets.
-
Keithley 2400 source meter
2400
Keithley
Used for electrical conductivity measurements.
-
Keithley 2700 electro meter
2700
Keithley
Used for electrical conductivity measurements.
-
Bi2O3
Sigma Aldrich
Used as a base material for the electrolyte layer in SOFCs.
-
Eu2O3
Sigma Aldrich
Used as a dopant to increase the chemical stability of Bi2O3.
-
Er2O3
Sigma Aldrich
Used as a dopant to increase the chemical stability of Bi2O3.
-
SEM
Leo 440
Used to investigate the detailed morphology, surface roughness and structure of the ternary systems.
-
登录查看剩余6件设备及参数对照表
查看全部
