Ferroelectric PLZT thick films grown by poly(1-vinylpyrrolidone-co-vinyl acetate) (PVP/VA)-modified sol-gel process

Journal Article · Tue Mar 01 04:00:00 EST 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2015.11.049· OSTI ID:1245437

Hu, Zhongqiang; Ma, Beihai; Li, Meiya; Koritala, Rachel E.; Balachandran, Uthamalingam

We report the growth of ferroelectric Pb0.92La0.08Zr0.52Ti0.48O3 (PLZT) thick films using a poly(1-vinylpyrrolidone-co-vinyl acetate) (PVP/VA)-modified sol–gel process. A per-coating thickness of ≈0.66 μm has been demonstrated using PVP/VA-modified solution, which is more than doubled that of the PLZT films grown by PVP-modified method, and nearly 6 times the per-coating thickness of films prepared by conventional sol–gel process. PLZT thick films grown on LNO/Ni substrates exhibited denser microstructure, higher remanent polarization (11 μC/cm²) and dielectric tunability (45%), lower leakage current density (≈1.2 × 10^-8 A/cm²), and higher breakdown strength (≈1.6 MV/cm) than those for the samples grown on PtSi substrates. These results demonstrated great potential of using PVP/VA-modified sol–gel process for high power film capacitor applications.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Vehicle Technology
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1245437
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 75; ISSN 0025-5408
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

Ceramics
Dielectric properties
Ferroelectricity
Sol-gel chemistry
X-ray diffraction