研究目的
To study the domain imaging in Fe-doped KNbO3 single crystals using trinocular microscopy and scanning electron microscopy, focusing on surface morphology and domain wall orientations.
研究成果
The study successfully observed 60° domains in Fe-doped KNbO3 single crystals using trinocular microscopy and SEM. Etching with HNO3 revealed etch pits and dislocations, aiding in domain nucleation. The type and amount of doping affect domain formation, and trinocular microscopy proved effective for surface morphology studies, while SEM showed herringbone domain structures.
研究不足
The paper does not explicitly mention specific limitations, but potential areas for optimization could include the resolution limits of the microscopy techniques used and the effects of etching parameters on domain visibility.
1：Experimental Design and Method Selection:
The study uses trinocular microscopy and scanning electron microscopy to observe ferroelectric domain walls in Fe-doped KNbO3 single crystals, employing an etching technique with HNO3 to reveal domain structures.
2：Sample Selection and Data Sources:
Fe-doped KNbO3 single crystals were grown using the flux method with specific starting materials and dopants.
3：List of Experimental Equipment and Materials:
Equipment includes a Dewinter trinocular materials microscope (model DMI-Prime with Dewinter material plus software version
4：1), scanning electron microscope, platinum crucible, mortar, and chemicals like K2CO3, Nb2O5, Fe2O3, and HNOExperimental Procedures and Operational Workflow:
Crystals were grown by heating mixtures in a platinum crucible, followed by cooling and reheating cycles. The crystal surfaces were etched with HNO3 at different ratios (maximum and minimum) for 30 minutes, and observations were made using trinocular microscopy and SEM.
5：Data Analysis Methods:
Photomicrographs and SEM micrographs were analyzed to study domain walls, orientations, and surface morphology.
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