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High Rate Growth of Large Diameter and High Quality Li_2B_4O_7 Piezoelectric Crystals and Practical Research on SAW Devices

Research Project

Project/Area Number 03555060
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 電子材料工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

SHIOSAKI Tadashi  Kyoto Univ.DEPT. of Electronics Assist Prof., 工学部, 助教授 (80026153)

Co-Investigator(Kenkyū-buntansha) FUJIMURA Sigeto  Nippon Mining Co. Ltd., Dept. of Q&E, Researcher, O&E事業部, 研究員
MIWA Kazuo  Nipoon Mining Co., Ltd., Dept. of Q&E, Researcher, O&E事業部, 研究員
SHIMIZI Masaru  Kyoto Univ.Dept. of Electronics Research, 工学部, 助手 (30154305)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1992: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1991: ¥2,600,000 (Direct Cost: ¥2,600,000)
KeywordsSingle crystal / Li_2B_4O_7 / Czochralski method / Zero TCD / Surface acoustic wave / Photo refractive effect / LiNbO_3 / BaTiO_3 / 光誘起屈折率効果 / TSSG法 / 位相共役波 / 光連想メモリ / チョクラルスキ-法 / 擬似弾性表面波 / 表面弾性波フィルタ-
Research Abstract

Transparent, core free and high quality single crystals of Li_2B_4O_7 were successfully grown from a congruent melt at rotation rate of 38.5rpm and growth rate of 3mm/h by the ADC(Automatic Diameter Con-trol) controlled Czochralski method. New Crystal growth methods adjusting the relationship between the rf-output power and the crystal rotation rate during the growth were proposed in order to improve the relatively low growth rate of Li_2B_4O_7. All the dielectric, elastic and piezoelectric constants and their first and second-order temperature coefficients have been measured.
The existence of an orientation with zero TCD(Temperature Coefficient of Delay) was predicted by a computer analysis and confirmed experimentally for the Raleigh and leaky SAW and BAW. There are useful substrate orientations for SAW devices with zero TCD around(0゚,78゚,90゚), where K_S^2 is approximately 1%. There is also a useful substrate orientation for the leaky SAW devices with a small TCD and a large coupling of 1.8% around(0゚,75゚,75゚). 900MHz SAW resonator filters were fabricated on Li_2B_4O_7 crystals.
Using the same Czochralski technique, LiNbO_3 and BaTiO_3 single crystals were successfully grown. The Photorefractive effect in these crystals were investigated for applications to phase conjugate genarator and optical associative memory.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] M.OHIRA: "Crystal Growth of LiNbO_3:Fe and Its Photorefractive Properties" Japanese Journal of Applied Physics. 30. 2326-2329 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Y.TANAKA: "Optical Associative Memory Using LiNbO_3:Fe Hologram" Japanese Journal of Applied Physics. 30. 2359-2362 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Z.Chen: "Anomalous Photovoltaic Current and Diffraction Efficiency in LiNbO_3 Single Crystals" Japanese Journal of Applied Physics. 31. 3174-3177 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Z.Chen: "Generation of Phase Conjugate Wave Using LiNbO_3:Fe and Application to Optical Associative Memory" Japanese Journal of Applied Physics. 31. 3178-3181 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Z.Chen: "Optical Associative Memory Using Photorefvactive LiNbO_3:Fe Hologram and LiNbO_3:Fe and BaTiO_3 Phase conjugate Mirror" Proc,of IEEE 8th Int.Sym.on the Applications of Ferroelectrics(Greenville,USA,1992). 47-50 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.OHKI: "Effect of Photo-refractivity induced periodic Strain Grating on Piezoelectric vibration in LiNbO_3:Fe" Proc,of IEEE 8th Int.Sym.on the Applications of Ferroelectrics(Greenville,USA,1992). 156-159 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Ohira: "Crystal Growth of NiNbO_3 : Fe and Its Photorefractive Properties" Jpn.J.Appl.Phys.Vol.30. 2326-2329 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Y.Tanaka: "Optical Associative Memory Using LinbO_3:Fe Hologram" Jpn.J.Appl.Phys.Vol.30. 2359-2362 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Z.Chen.: "Anomalous photovoltaic Current and Diffraction Efficiency in LiNbO_3 Single Crystals" Jpn.J.Apply.Phys.Vol.31. 3147-3177 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Z.Chen: "Generation of Phase Conjugate Wave Using LiNbO_3:Fe and Application to Optical Associative Memory" Jpn.J.Apple.Phys.Vol.31. 3178-3181 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Z.Chen: "Optical Associative Memory Using Photorefractive LiNbO_3:Fe Hologram, and LiNbO_3:Fe end BaTiO_3 Phase conjugate Mirror" Proc. of IEEE 8th Int.Symo. on the Applications of Ferroelectrics(Greenville, USA). 47-50 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Ohki: "Effect of Photorefractivity induced periodic Stain Grating on Piezoelectric Vibration in LiNbO_3:Fe" ibid. 156-159

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Ohki: "Influence on Photorefractive Effect on Piezoelectric Vibration" Jpn.J.Appl.Phys. Vol.31. 3249-3251 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Ohki: "Nonlinear Phenomena Caused by Periodic Electric Charge Distribution in Piezoelectric Resonator" Proc.ieee Ultrasonic Symposium(Tucson, USA, 1992).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Z.Chen: "Anomalous Photovoltaic Current and Diffraction Efficiency in LiNbO_3 Single Crystals" Japanese Journal of Applied Physics. 31. 3174-3177 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Z.Chen: "Generation of Phase Conjugate Wave Using LiNbO_3:Fe and Application to Opical Associative Memory" Japanese Journal of Applied Physics. 31. 3178-3181 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Z.Chen: "Optical Associative Memory Using Photrefractie LiNbO_3:Fe Hologram and LiNbO_3:Fe and BaTiO_3 Phase Conjugate Mirror" Proc.of IEEE 8th Int.Sym.on the Applications of Ferroelectrics.

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Ohki: "Influence of Photorefractive Effect on Piezoelectric Vibration" Japanese Journal of Applied Physics. 31. 3249-3251 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Ohki: "The Effect of Photo refractively Induced Periodic Strain Grating on Piezoelectric Vibration in LiNbO_3:Fe" Proc.of IEEE 8th Int.Sym.on the Applications of Ferroelectrics. (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Ohki: "Nonlinear Phenomena Caused by Periodic Electric Charge Distribution in Piezoelectric Resonator" Proc.IEEE Ultrasonic Symposium. (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Tadashi SHIOSAKI: "Piezoelecfric Thin Films" Journal of the Ceramic Society of Japan. 99. 836-841 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Masaki OHIRA: "Crystal Growth of LiNbO_3:Fe and Its Photorefractive Properties" Japanese Journal of Applied Physics. 30. 2326-2329 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Yukio TANAKA: "Optical Associative Memory using LiNbO_3:Fe Hologram." Japanese Journal of Applied Physics. 30. 2359-2362 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Zhiming CHEN: "APV Current and Diffraction Efficiency of LiNbO_3 Single Crystal" Japanese Journal of Applied Physics. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Tadashi KASAMATU: "Generation of Phase Cmjugate Wave in LiNbO_3:Fe and Its Application to Optical Associative Memory" Japanese Journal of Applied Physics.(1992)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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