Preface

**Section 3 Piezoelectric Applications 127**

Hiroshi Maiwa

**VI** Contents

Chapter 6 **Piezoelectric Energy Harvesting 129**

Cruz and Omar Terán-Jiménez

Chapter 8 **Piezoelectric-Layered Structures Based on Synthetic Diamond 161**

Burkov and Vladimir D. Blank

Chapter 9 **Piezoelectric Materials in RF Applications 201** Philippe Benech and Jean‐Marc Duchamp

Chapter 7 **Polymeric Prosthesis as Acoustic, Pressure, Temperature, and**

**Light Sensor Fabricated by Three-Dimensional Printing 143** Ernesto Suaste-Gómez, Grissel Rodríguez-Roldán, Héctor Reyes-

Boris P. Sorokin, Gennady M. Kvashnin, Arsenii V. Telichko, Sergey I.

The book *Piezoelectric Ceramics* by B. Jaffe et al. (1971) has been a great book for this field for over 40 years. However, the science and technology in this area are extremely progressing, especially the materials research, measurement technique, theory and applications, and fur‐ thermore, demanded to fit social technical requests such as environmental problems. While they had been concentrated on piezoelectric ceramics composed of lead-containing composi‐ tions, such as lead zirconate titanate (PZT) and lead titanate, at the beginning because of the high piezoelectricity, recently lead water pollution by soluble PZT of our environment must be considered. Therefore, different new compositions of lead-free ceramics in order to re‐ place PZT are needed. Until now, there have been many studies on lead-free ceramics look‐ ing for new morphotropic phase boundaries, ceramic microstructure control to realize high ceramic density, including composites and texture developments, and applications to new evaluation techniques to search for high piezoelectricity; as a result, the R&D has become like same kind of "Fine Arts of Electronic Ceramics". The purpose of this book is focused on the latest reports in piezoelectric materials such as lead-free ceramics, single crystals, and thin films from viewpoints of "piezoelectric materials", "piezoelectric science" and "piezo‐ electric applications".

The contents of the chapters in the book are as follows:

Section 1 consists of major lead-free piezoelectric ceramics, such as alkali niobate and alkali bismuth titanate and, furthermore, how high coupling factor can be realized in lead-free ce‐ ramics. In addition, roles of domain and grain boundaries in single crystals and ceramics evaluated by a new technique are described.

Section 2 consists of piezoelectric perovskites and other structures treated theoretically.

Section 3 consists of piezoelectric devices such as energy harvesting, sensor, and communi‐ cation tool.

As the relationships between piezoelectric materials, evaluation, and device researches are connected and progress each other, I hope the contents in the book contribute to your R&D in *Piezoelectric Materials*. Finally, I would like to express my thanks to Ms. Ivona Lovric for encouraging and supporting me to publish the book.

> **Prof. Toshio Ogawa, Ph.D.** Professional Engineer Department of Electrical and Electronic Engineering Shizuoka Institute of Science and Technology Japan

**Piezoelectric Materials**
