Daniel Grüner
Stockholm University
18 Papers
109 Citations
Daniel Grüner is an academic researcher from Stockholm University. The author has contributed to research in topics: Spark plasma sintering & Ceramic. The author has an hindex of 9, co-authored 18 publications.
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Papers
Ferroelectric Domain Structures and Electrical Properties of Fine-Grained Lead-Free Sodium Potassium Niobate Ceramics
Mirva Eriksson,Haixue Yan,Giuseppe Viola,Huanpo Ning,Daniel Grüner,Mats Nygren,Michael J. Reece,Zhijian Shen +7 more
TL;DR: In this paper, the critical grain size for a single domain single grain structure for NKN is shown to be 99.5% theoretical density, which suggests that the material is a good candidate for lead-free piezoelectric applications.
74
Direct Scanning Electron Microscopy Imaging of Ferroelectric Domains After Ion Milling
Daniel Grüner,Zhijian Shen +1 more
TL;DR: In this article, a method for directly observing the ferroelectric domain structure by scanning electron microscopy after argon ion milling has been established, which is exemplified by exposing the domai...
31
Precession electron diffraction using a digital sampling method.
TL;DR: A software-based method for collecting precession electron diffraction patterns is described, which resembles the sampling of a conventional PED pattern and can be used for structure solution and refinement with reasonably good R-values.
30
Synthesis, spark plasma sintering and electrical conduction mechanism in BaTiO3–Cu composites
Songhak Yoon,Juergen Dornseiffer,Yan Xiong,Daniel Grüner,Zhijian Shen,Shoichi Iwaya,Christian Pithan,Rainer Waser +7 more
TL;DR: In this paper, BaTiO 3 -Cu composites were successfully densified by spark plasma sintering (SPS) and the microstructures show an average grain-size for Ba-TiO-3 of around 100nm and a crystallite size of about 1μm for the Cu inclusions.
23
Ordered coalescence of nano-crystals during rapid solidification of ceramic melts
Daniel Grüner,Zhijian James Shen +1 more
TL;DR: In this paper, a fast cooling of an aluminosilicate-zirconia melt after laser sintering results in the formation of zirconium nano-crystals and dendritic zirconia crystals embedded in a glass matrix.