RECENT DEVELOPMENTS AND FUTURE PERSPECTIVES OF LEAD-FREE FERROELECTRICS

2010 ◽  
Vol 03 (01) ◽  
pp. 1-4 ◽  
Author(s):  
RÜDIGER-A. EICHEL ◽  
HANS KUNGL
Keyword(s):  
Piezoelectric Properties ◽  
Ferroelectric Materials ◽  
Lead Free ◽  
Current Status ◽  
Environmental Concerns ◽  
Scale Analysis ◽  
Future Perspectives ◽  
Micro Structure ◽  
Research Activities ◽  
Recent Developments

Lead-free ferroelectric materials are currently subject to extensive research activities owing to environmental concerns and corresponding legislation which point to substitute lead-based ferroelectric materials. The paper provides an overview on recent research activities and trends in the field of lead-free ferroelectrics. The current work is grouped by contributions to atomistic-scale analysis of lead-free materials, structure and phase formation, micro structure and dopant effects on piezoelectric properties. The results and challenges to research in these fields are briefly sketched; so a framework is provided in which the contributions of the present topical issue to the major topics in lead-free ferroelectrics are related. The contributions in this issue are listed in Refs. 63–77. Finally, the current status of research and technology on lead-free materials is summarized.

Lead-free piezoelectrics: Current status and perspectives

2013 ◽  
Vol 03 (02) ◽  
pp. 1330002 ◽  
Author(s):  
Indrani Coondoo ◽  
Neeraj Panwar ◽  
Andrei Kholkin
Keyword(s):  
Lead Zirconate Titanate ◽  
Structural Engineering ◽  
Piezoelectric Properties ◽  
Sol Gel ◽  
Lead Free ◽  
Ferroelectric Ceramics ◽  
Current Status ◽  
Structure Property ◽  
Piezoelectric Energy ◽  
Recent Developments

In the last few years, there has been tremendous effort to develop lead-free ferroelectric ceramics with high piezoelectric properties by various doping and alloying routes. Several material systems have been explored, however, no prominent alternative to the versatile lead zirconate titanate (PZT) system has been found yet. Despite the achieved improvement in piezoelectric properties, there are problems in the synthesis, processing and poling of the sintered ceramics. Various processing techniques including microwave, hydrothermal, sol–gel, Pechini and spark plasma sintering have been used to overcome the drawbacks related to synthesis issues. In this paper, an attempt is made to review recent developments on lead-free piezo materials emphasizing their preparation, structure–property relations, and consequent physical properties. In this context, both compositional and structural engineering approaches to achieve acceptable piezoelectric properties in lead-free materials are discussed. Piezoelectric properties of the most promising lead-free compositions/families including titanates, alkaline niobates and bismuth perovskites and their solid solutions, along with non-perovskites such as bismuth layer-structured ferroelectrics are reviewed in detail. A brief coverage of the recent developments in the area of piezoelectric energy harvesting is also encompassed.

Methane conversion into different hydrocarbons or oxygenates: current status and future perspectives in catalyst development and reactor operation

2017 ◽  
Vol 7 (2) ◽  
pp. 366-381 ◽  
Author(s):  
Evgenii V. Kondratenko ◽  
Tim Peppel ◽  
Dominik Seeburg ◽  
Vita A. Kondratenko ◽  
Narayana Kalevaru ◽  
...  
Keyword(s):  
Methane Conversion ◽  
Current Status ◽  
Future Perspectives ◽  
Reactor Operation ◽  
Catalyst Development ◽  
Recent Developments

This Perspective highlights recent developments in methane conversion into different hydrocarbons and C1-oxygenates. Our analysis identified possible directions for further research to bring the above approaches to a commercial level.

scholarly journals Influence Of Fabrication Condition on the Microstructural and Optical Properties of Lead-Free Ferroelectric Bi\(_{0.5}\)Na\(_{0.5}\)TiO\(_{3}\) Materials

2016 ◽  
Vol 26 (1) ◽  
pp. 51 ◽  
Author(s):  
Le Thi Hai Thanh ◽  
Nguyen Hoang Tuan ◽  
Luong Huu Bac ◽  
Dang Duc Dung ◽  
Phung Quoc Bao
Keyword(s):  
Optical Properties ◽  
Potential Application ◽  
Piezoelectric Properties ◽  
Sol Gel ◽  
Ferroelectric Materials ◽  
Precursor Concentration ◽  
Lead Free ◽  
Promising Candidate ◽  
Fabrication Condition ◽  
Ferroelectric And Piezoelectric Properties

Lead-free ferroelectric materials have attracted considerable attention due to the increasing potential application in environmental benign materials. Among lead-free ferroelectric materials, the Bi0.5Na0.5TiO3 (BNT) materials were more studied because it exhibited the good ferroelectric and piezoelectric properties which could be promising candidate materials replacing Pb(Zr,Ti)O3. In this work, the lead-free ferroelectric BNT materials were synthesized by sol-gel method. The effects of fabrication process to microstructural and optical properties were studied which includes Na precursor concentration and calcining temperature. The result indicated that the Na precursor concentration were higher 40 mol.% and the calcining temperatures

Porous ferroelectric materials for energy technologies: current status and future perspectives

2021 ◽  
Author(s):  
Mingyang Yan ◽  
Zhida Xiao ◽  
Jingjing Ye ◽  
Xi Yuan ◽  
Zihe Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Ferroelectric Materials ◽  
Current Status ◽  
Future Perspectives ◽  
Figures Of Merit ◽  
Energy Technologies ◽  
Significant Interest ◽  
Catalytic Applications ◽  
Wide Potential

Ferroelectric materials have attracted significant interest due to their wide potential in energy harvesting, sensing, storage, and catalytic applications. For monolithic and dense ferroelectric materials, their performance figures of merit...

Ferroelectric Materials: Nanoscale Atomic Displacements Ordering for Enhanced Piezoelectric Properties in Lead-Free ABO3Ferroelectrics (Adv. Mater. 29/2015)

2015 ◽  
Vol 27 (29) ◽  
pp. 4329-4329
Author(s):  
Abhijit Pramanick ◽  
Mads R. V. Jørgensen ◽  
Souleymane O. Diallo ◽  
Andrew D. Christianson ◽  
Jaime A. Fernandez-Baca ◽  
...  
Keyword(s):  
Piezoelectric Properties ◽  
Ferroelectric Materials ◽  
Lead Free ◽  
Atomic Displacements

scholarly journals Environmental Monitoring of Pesticides by Immunoanalytical Techniques: Validation, Current Status, and Future Perspectives

2001 ◽  
Vol 84 (5) ◽  
pp. 1393-1406 ◽  
Author(s):  
Nanju A Lee ◽  
Ivan R Kennedy
Keyword(s):  
Risk Management ◽  
Liquid Chromatography ◽  
Environmental Monitoring ◽  
Environmental Contaminants ◽  
Analytical Tool ◽  
Current Status ◽  
Gas Liquid Chromatography ◽  
Future Perspectives ◽  
Reliable Monitoring ◽  
Recent Developments

Abstract Reliable monitoring technology is an essential component of effective regulation and risk management of environmental contaminants such as pesticides. Most environmental monitoring and analysis is currently conducted using instrumental techniques such as gas–liquid chromatography (GLC) and liquid chromatography (LC). Immunoanalysis provides powerful monitoring techniques that have emerged in the last 3 decades. This paper shows they can deliver rapid, accurate, and relatively inexpensive analysis with high throughput and that have the capability to be field oriented. The technique is versatile in application and can be formatted to suit different purposes such as quantitative analysis or simple “yes/no” tests that are field-portable. While there is a range of opinion on the merits of immunoassays as an analytical tool for pesticides, we suggest that this technology is best considered as complementary to GLC and LC, extending the range of capability for field monitoring. Supporting this view, an increasing number of successful applications of immunoassays to monitoring have been reported in recent years. We also report here the implications of recent developments in the field of immunodiagnostics and their application to monitoring of environmental contaminants. We emphasise that, together with adequate validation by instrumental techniques, immunoassays provide monitoring services yielding realistic and comprehensive data for risk management, allowing decisions on appropriate action by various authorities to be made.

scholarly journals EU research activities in alternative testing strategies: current status and future perspectives

2009 ◽  
Vol 83 (12) ◽  
pp. 1037-1042 ◽  
Author(s):  
T. Vanhaecke ◽  
S. Snykers ◽  
V. Rogiers ◽  
B. Garthoff ◽  
J. V. Castell ◽  
...  
Keyword(s):  
Current Status ◽  
Future Perspectives ◽  
Testing Strategies ◽  
Research Activities ◽  
Alternative Testing ◽  
Alternative Testing Strategies

Predictive biomarkers for immunotherapy efficacy in non-small-cell lung cancer: current status and future perspectives

2020 ◽  
Vol 14 (14) ◽  
pp. 1383-1392
Author(s):  
Deniz C Guven ◽  
Taha K Sahin ◽  
Omer Dizdar ◽  
Saadettin Kilickap
Keyword(s):  
Checkpoint Inhibitors ◽  
Low Cost ◽  
Predictive Biomarkers ◽  
Current Status ◽  
Future Perspectives ◽  
Mutational Burden ◽  
Recent Developments ◽  
Tumor Mutational Burden ◽  
Ease Of Access ◽  
Nsclc Patients

In recent years, immune checkpoint inhibitors have rapidly changed treatment paradigms and have been pivotal for the treatment of advanced NSCLC patients. However, many patients don't respond to immunotherapy, and toxicities are a concern. Mounting evidence suggests that PD-L1 expression and tumor mutational burden are useful biomarkers in NSCLC and widely used in clinical practice. Given various limitations of PD-L1 and tumor mutational burden, many candidate biomarkers have emerged. From these biomarkers, peripheral blood-based biomarkers are promising options for the prediction of immunotherapy efficacy with ease of access, repeatability and low cost. This review provides an overview of recent developments on the biomarkers in immunotherapy efficacy together with comments on future perspectives.

scholarly journals Morphogenesis mechanisms in the hydrothermal growth of lead-free BCZT nanostructured multipods

CrystEngComm ◽  
2021 ◽  
Author(s):  
Zouhair Hanani ◽  
El-Houssaine Ablouh ◽  
Soukaina Merselmiz ◽  
Jaafar Ghanbaja ◽  
M'barek Amjoud ◽  
...  
Keyword(s):  
Piezoelectric Properties ◽  
Hydrothermal Growth ◽  
Lead Free ◽  
Environmental Concerns

Due to growing environmental concerns on the toxicity of lead-based piezoelectrics, the replacement of Pb-based materials by the homologs with comparable piezoelectric properties but without lead is an emergent task....

Schottky diodes based on 2D materials for environmental gas monitoring: a review on emerging trends, recent developments and future perspectives

2021 ◽  
Author(s):  
Minu Mathew ◽  
Chandra Sekhar Rout
Keyword(s):  
Gas Sensing ◽  
2D Materials ◽  
Schottky Diodes ◽  
High Sensitivity ◽  
Future Perspectives ◽  
Working Temperature ◽  
Emerging Trends ◽  
Gas Sensing Properties ◽  
Recent Developments ◽  
Sensitivity And Selectivity

This review details the fundamentals, working principles and recent developments of Schottky junctions based on 2D materials to emphasize their improved gas sensing properties including low working temperature, high sensitivity, and selectivity.

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