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A comparative study of pressure slip casting and spray granulation-molding for fabricating dense YBCO superconducting targets.

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Title: A comparative study of pressure slip casting and spray granulation-molding for fabricating dense YBCO superconducting targets.
Authors: Zhang, Wenyu1 (AUTHOR), Zhang, Jianhang1 (AUTHOR), Liu, Xiaokai1 (AUTHOR), Sun, Benshuang1,2,3 (AUTHOR), Zhao, Hetao1 (AUTHOR), Cheng, Nuo1 (AUTHOR), Liang, Xina1 (AUTHOR), Bi, Wenhui1 (AUTHOR), Zhang, Mingzhen1 (AUTHOR), Liu, Yang1,2,3 (AUTHOR) louis@zzu.edu.cn, He, Jilin1,2,3 (AUTHOR)
Source: Ceramics International. Apr2026:Part A, Vol. 52 Issue 9, p11056-11066. 11p.
Subjects: Slip casting, Yttrium barium copper oxide, Fabrication (Manufacturing), Superconductivity, Sintering, Electric conductivity
Abstract: This study conducts a systematic investigation into the fabrication of high-performance YBCO superconducting targets using pressure slip casting (PSC) and spray granulation–molding (SGM). By optimizing slurry properties, forming processes, and sintering conditions, it was determined that a pH of 5 provides the optimal Zeta potential (|ζ| = 106.3 mV), while ball milling for 36 h results in a fine particle size (D50 = 0.26 μm) and low viscosity (88 mPa s). The PSC green compacts exhibit enhanced sinterability, with shrinkage initiation occurring at 510 °C and densification completion around 880 °C. Analysis using the master sintering curve reveals that PSC has a lower activation energy (360 kJ/mol) compared to SGM (405 kJ/mol). Following sintering at 920 °C for 30 h, PSC targets exhibit superior density (6.20 g/cm3), electrical conductivity (ρ 300K = 1.31 mΩ cm), flexural strength (61.69 MPa), and superconducting performance (T c = 90.67 K, ΔT c = 5.96 K, J c = 118.31 A/cm2) relative to SGM targets (5.98 g/cm3, 103.42 mΩ cm, 42.52 MPa, 89.60 K, 13.06 K, and 100.47 A/cm2, respectively). This research provides a viable approach for producing high-quality YBCO sputtering targets for applications in superconducting films. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:This study conducts a systematic investigation into the fabrication of high-performance YBCO superconducting targets using pressure slip casting (PSC) and spray granulation–molding (SGM). By optimizing slurry properties, forming processes, and sintering conditions, it was determined that a pH of 5 provides the optimal Zeta potential (|ζ| = 106.3 mV), while ball milling for 36 h results in a fine particle size (D50 = 0.26 μm) and low viscosity (88 mPa s). The PSC green compacts exhibit enhanced sinterability, with shrinkage initiation occurring at 510 °C and densification completion around 880 °C. Analysis using the master sintering curve reveals that PSC has a lower activation energy (360 kJ/mol) compared to SGM (405 kJ/mol). Following sintering at 920 °C for 30 h, PSC targets exhibit superior density (6.20 g/cm3), electrical conductivity (ρ 300K = 1.31 mΩ cm), flexural strength (61.69 MPa), and superconducting performance (T c = 90.67 K, ΔT c = 5.96 K, J c = 118.31 A/cm2) relative to SGM targets (5.98 g/cm3, 103.42 mΩ cm, 42.52 MPa, 89.60 K, 13.06 K, and 100.47 A/cm2, respectively). This research provides a viable approach for producing high-quality YBCO sputtering targets for applications in superconducting films. [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2026.01.271