Bismuth Sodium Titanate Lead-Free Piezoelectric Ceramics Fabricated by Using Novel Low-Temperature Solid-State Synthesis Method

Herein, surfactant-assisted PANI nanorods was synthesized via the solid-state synthesis method at different concentrations of sodium lauryl sulfate (SLS). Upon the addition of SLS, the average rod diameter of PANI...

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Preparation and Properties of Bi0.5Na0.5TiO3-Ba (Hf,Ti)TiO3 Lead-Free Piezoelectric Ceramics

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.334-335.957 ◽

2007 ◽

Vol 334-335 ◽

pp. 957-960

Author(s):

Hu Yong Tian ◽

Wan Ping Chen ◽

D.Y. Wang ◽

Y. Wang ◽

J.T. Zeng ◽

...

Keyword(s):

Piezoelectric Coefficient ◽

Sodium Titanate ◽

Piezoelectric Ceramics ◽

Lead Free ◽

Synthesis Process ◽

Bismuth Sodium Titanate ◽

Promising Candidate ◽

Device Applications ◽

The Relationship ◽

Bismuth Sodium

Lead-free piezoelectric ceramics based on bismuth sodium titanate (BNT) -barium hafnate titanate (BHT) were prepared by a two-step synthesis process. The final BNT-BHT ceramics sintered at 1180oC for 2 h in air showed a perovskite structure with high density. The morphotropic phase boundaries (MPB) were found in BNT based piezoelectric ceramics with 8~10 wt% BHT in composites. In the case of Bi0.5Na0.5TiO3-0.08BaHf0.05Ti0.95O3 ceramics, a maximum piezoelectric coefficient d33 of 122.6 pC/N was obtained. The remnant polarization (Pr) and coercive field (Ec) were measured and the relationship between ferroelectricity and the BHT fraction in the compounds was investigated. The BNT-BHT ceramics were expected to be a new and promising candidate for lead-free piezoelectric device applications.

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One-step low-temperature solid-state synthesis of lead-free cesium copper halide Cs3Cu2Br5 phosphors with bright blue emissions

Materials Today Chemistry ◽

10.1016/j.mtchem.2021.100678 ◽

2022 ◽

Vol 23 ◽

pp. 100678

Author(s):

Xiaoyong Huang ◽

Shaoying Wang ◽

Balaji Devakumar ◽

Nan Ma

Keyword(s):

Solid State ◽

Low Temperature ◽

Solid State Synthesis ◽

Lead Free ◽

Copper Halide ◽

One Step ◽

Bright Blue

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On Improving the Cycling Stability of P2-Type Na0.67Ni0.33Mn0.67O2 Cathode Material By Ti-Substitution for Na-Ion Batteries

10.1149/osf.io/p426u ◽

2019 ◽

Author(s):

Debanjana Pahari ◽

Sreeraj Puravankara

Keyword(s):

Solid State ◽

Cathode Material ◽

Discharge Capacity ◽

Synthesis Method ◽

Cycling Stability ◽

Solid State Synthesis ◽

Initial Discharge Capacity ◽

Initial Discharge ◽

Ti Substitution ◽

Solid State Synthesis Method

A novel cathode material with Ti-substitution on Ni site, P2-type Na0.67Ni0.25Ti0.08Mn0.67O2 has been synthesized via solid-state synthesis method and characterized electrochemically. Na0.67Ni0.25Ti0.08Mn0.67O2 electrodes have been observed tobe highly reversible at higher voltage ranges. The electrodes have an initial discharge capacity of 125 mAhg-1and can retain around 84% of this capacity (105 mAhg-1) even after 50 cycles at 0.1C when cycled at an uppercut-off voltage of 4.3 V. Na0.67Ni0.25Ti0.08Mn0.67O2 electrodes are believed to suppress the irreversible P2-O2 transformation by diverting the charging reaction through a more reversible P2-OP4transition.

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