第 19 回山梨エレクトロセラミックスセミナー
日時：2014 年 7 月 29 日（火）14:00-15:30

場

所：情報メディア館 5 階多目的ホール

いつもお世話になっております。山梨大での研究活動の一環として、国内外の電子セラミックスの分野で活躍されている研究者の方々にその成果を発表していただく場として、新たに「山梨エレクトロセラミックスセミナー」を設立しました。その第 19 回として、以下の講演を行います。ぜひ、ご参加いただき、今後ともこの活動にご協力いただければ幸いです。

講師： Ho-Yong Lee

博士（ホーヨン・リー博士、hlee@ceracomp.com）(Sunmoon University サンムーン大学 教授)（Ceracomp Co., Ltd セラコンプ社社長）

講演題目：「“Lead-based” and “Lead-free” Piezoelectric Single Crystals
Fabricated by “Low Cost” Solid-State Crystal Growth (SSCG) Method:
Development and Application”
低コスト”な固相結晶成長法により作製した鉛系&非鉛系圧電単結晶：その開発状況および応用」
講演概要
Crystallographically engineered Relaxor-PT single crystals,
specifically PMN-PT and PZN-PT, offer much higher piezoelectricand electromechanical coupling coefficients (d33 > 1,500 pC/N, k33 >0.9), when compared to PZT ceramics.

Therefore, the highperformance piezoelectric single crystals have been expected toreplace polycrystalline PZT ceramics in many application fields suchas ultrasound transducers (medical and NDA), SONAR transducer,
piezoelectric actuators, piezoelectric sensors, ultrasonic motors andpiezoelectric energy harvesting, etc. Ceracomp Co., Ltd. (SouthKorea) has developed the solid-state single crystal growth (SSCG) technique for fabricating the high performance “lead (Pb)-based”
piezoelectric single crystals such as PMN-PT and PMN-PZT.

Since the SSCG process is quite simple and similar to conventionalsintering process, compared to conventional single crystal growth methods such as flux and Bridgman methods, it is very
cost-effective and suitable to mass production.

And recently the SSCG method was successfully applied to growth of “lead(Pb)-free” piezoelectric single crystals of high electromechanical coupling coefficients (k33 > 0.85). In this presentation the recent
progress on development and application of piezoelectric single crystals (“lead-based” as well as “lead-free”) using the“cost-effective” SSCG process will be reviewed.

* Lee 教授は、現在固相結晶成長法による単結晶育成研究の世界 top の方です。
問合せ先：和田智志，Phone: 055-220-8555，e-mail: swada@yamanashi.ac.jp

Ceracomp Co., Ltd.
High Performance Ferroelectric and Piezoelectric Single Crystals(BaTiO3, (Ba,Sr)TiO3, Ba(Zr,Ti)O3, PMN-PT and PMN-PZT)
Ceracomp Co. Ltd. announces the release of piezoelectric PMN-PT and PMN-PZT singlecrystals, which are fabricated by the cost-effective solid-state crystal growth (SSCG) method.
Their excellent dielectric and piezoelectric properties make them the best candidates forsensors, transducers, actuators, energy harvesters, and single crystal-epoxy composites.
PMN-PT and PMN-PZT single crystals are available with lateral dimensions up to 60 mm.
High TC PMN-PZT single crystals (TC>200oC) are also available by request.

Single Crystal Wafer“1-3” Composite“Flexible” Macro Fiber Composite

Typical Properties of (001) PMN-29PT and PMN-PZT (CPSC[TC]-[TRT]; HPSC[TC]-[TRT])PMN29PT

CPSC
160-95CPSC
180-120CPSC
200-145

HPSC
180-120HPSC
200-145

Dielectric Constant [ε33T/ε0]

5,500

7,000

6,000

4,500

4,000

3,500

Dielectric Loss [tan, %]

< 1.0

< 1.0

< 1.0< 1.0< 0.5< 0.5oCurie Temperature [TC, C]

130

160

180200180200R-T Transition Temp. [TRT, oC]

9095120145120145

EM Coupling Factor [k33]0.90

0.93

0.93

0.92

0.9

0.9

Piezoelectric Const. [d33, pC/N]

1,500

2,000

1,850

1,500

1,300

1,100

EM Coupling Factor [k32] - (011)

0.87

0.91

0.90

0.90

0.88

0.86

Piezo. Const. [d32, pC/N] - (011)-1,350-1,850-1,650-1,400-1,200-900

Coercive Electric Field [EC, kV/cm]

2.5

4455

6

Mechanical Quality Factor [Qm]

100

100

100

100> 500> 1,000

Please visit “www.ceracomp.com”.
2F-203, 42, Baekseokgongdan 1-Ro, Seobuk-Gu, Cheonan, Chungnam, SOUTH KOREA (Postal Code: 331-979)
Contact: hlee@ceracomp.com (www.ceracomp.com), Tel: 82-41-584-2366, Fax: 82-41-584-2367