研究目的
To produce spherical BFO agglomerate by USP and to study the effect of TA concentration on the synthesis temperature, morphology and magnetic properties.
研究成果
Single-phase samples of BFO were produced by USP from nitrate solutions in the presence of tartaric acid. The enhancement of TA concentration led to a nonlinear reduction of the synthesis temperature and changes in the morphology and magnetic properties of the hollow spheres. The magnetic properties were found to be determined by both the size of nanoparticles and their spatial distribution in the agglomerate.
研究不足
The study focuses on the synthesis and characterization of BiFeO3 hollow spheres and their magnetic properties. The influence of tartaric acid concentration on the synthesis temperature and morphology was established, but the study does not explore the potential applications of these materials in detail.
1：Experimental Design and Method Selection:
Ultrasonic spray pyrolysis (USP) was used for the synthesis of BiFeO3 powders from nitrate solutions with tartaric acid. The process involved drying and synthesis zones to form hollow spherical agglomerates.
2：Sample Selection and Data Sources:
Solutions with varying concentrations of tartaric acid were prepared and used for synthesis. The phase, morphology, and magnetic properties of the resulting powders were analyzed.
3：List of Experimental Equipment and Materials:
An ultrasonic 1.7 MHz transducer, tube furnace with two heating zones, electrostatic precipitator, XRD-7000 diffractometer, field emission electron microscope TESCAN MIRA 3 LMU, Gemini VII Surface Area and Porosity 2390t facility, vacuum pycnometric system AccuPyc II 1340, cryogenic magnetometer VSM-5T, and VG ESCALAB MK II electron spectrometer were used.
4：7 MHz transducer, tube furnace with two heating zones, electrostatic precipitator, XRD-7000 diffractometer, field emission electron microscope TESCAN MIRA 3 LMU, Gemini VII Surface Area and Porosity 2390t facility, vacuum pycnometric system AccuPyc II 1340, cryogenic magnetometer VSM-5T, and VG ESCALAB MK II electron spectrometer were used.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The aerosol of the initial solution was passed through drying and synthesis zones to form BiFeO3 powders. The morphology, porosity, and magnetic properties were then analyzed.
5：Data Analysis Methods:
X-ray diffraction, electron microscopy, nitrogen sorption, pycnometry, magnetometry, and X-ray photoelectron spectroscopy were used for data analysis.
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