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Wetting and spreading of Ca‐Y‐Ba‐Cu‐O solution on Y 2 O 3 and CaSZ crucible in growing Y 1‐ x Ca x Ba 2 Cu 3 O 7‐δ single crystal
Author(s) -
Huang Simin,
Zhu Yanhan,
Qian Jun,
Wan Yan,
Yin Yiqian,
Zhou Ligang,
Diko Pavel,
Kucharova Veronika,
Zmorayova Katarina,
Kim YoungJune,
Yao Xin
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17212
Subject(s) - crucible (geodemography) , wetting , micro pulling down , phase (matter) , crystallography , layer (electronics) , chemistry , crystal (programming language) , materials science , single crystal , analytical chemistry (journal) , mineralogy , chemical engineering , nanotechnology , composite material , chromatography , computational chemistry , computer science , programming language , organic chemistry , engineering
Sizable and uniform Y 1‐ x Ca x Ba 2 Cu 3 O 7‐δ single crystals are of significant importance to study high‐temperature superconductivity. However, the severe liquid loss resulting from intrinsic wetting property during top‐seeded solution‐growth (TSSG), makes it difficult to obtain such crystals. Here the reactive wetting performance of the Ca‐Y‐Ba‐Cu‐O solution on two types of crucibles was studied. It was identified that the spreading process on the Y 2 O 3 crucible is characterized by forming double‐layer of Y 2 BaCuO 5 and YBa 2 Cu 3 O 7‐δ , while that on the CaSZ crucible (Ca‐stabilized ZrO 2 ) produces the BaZrO 3 layer with CuO phase. In the former case, the liquid has a low energy interface with the top layer of YBa 2 Cu 3 O 7‐δ , leading to strong spreading and creeping behaviors. Conversely, due to a high interfacial energy between solution and BaZrO 3 , the CaSZ crucible has a low wettability, particularly beneficial to solve the liquid loss problem. Consequently, with negligible liquid creeping out of CaSZ crucibles, we succeeded in growing a series of homogeneous Y 1‐x Ca x Ba 2 Cu 3 O 7‐δ single crystals with an acceptable size up to a × b × c = 11.2 × 11 × 4.8 mm 3 . Moreover the wetting modes of solution on various kinds of crucibles for TSSG in growing doped YBa 2 Cu 3 O 7‐δ single crystals were also elucidated. Most importantly, the understanding gained from this work is broadly applicable for producing other desirable doped‐crystals.