• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1992 Fiscal Year Final Research Report Summary

Development of chemical sensor to measure Al concentration in molten Zn bath using composite mixed salt electrolyte.

Research Project

Project/Area Number 03555144
Research Category

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

Allocation TypeSingle-year Grants
Research Field 金属精錬・金属化学
Research InstitutionNagoya Institute of Technology

Principal Investigator

YAMAGUCHI Shu  Nagoya Institute of Technology, Department of Materials Science and Engineering, Associate Professor, 工学部, 助教授 (10182437)

Co-Investigator(Kenkyū-buntansha) KIMURA Hideo  Yamari Industry Ltd., Department of Research and Development, Manager, 研究開発部, 課長
FUKATSU Norihiko  Nagoya Institute of Technology, Department of Materials Science and Engineering,, 工学部, 助教授 (80029355)
Project Period (FY) 1991 – 1992
KeywordsChemical Sensor / Solid Electrolyte / Galvanic Cell / CGL / Aluminum / Beta-Alumina / Molten Salt
Research Abstract

Chemical sensors using composite mixed salt electrolyte have been developed to measure aluminum content in molten Zn alloys. The present sensors are composed of composite type electrolyte of molten mixed halides of NaCl and AlCl_3 saturated with solid NaCl. A variable solid to liquid volume ratio enables one to obtain a wide range of mechanical properties as a sensor component from almost pure liquid characteristics to solid ones as those of solid electrolytes.
Two types of sensors, with and without beta-alumina membrane electrolyte to separate electrolytes contacting with pure Al reference and molten Zn electrodes, were tested for its performance in both laboratory scale (less than 10kg) and practical Zn bather (greater than 4,000kg). The former sensor can be expressed as ;
Zn-Al*NaC1<@D2sat.@>D2+AlC1<@D23@>D2(+ZnC1<@D22@>D2):<@D7(Na<@D1+@>D1)(/)beta-alumina@>D7:Nac1<@D2sat.@>D2+AlCl<@D23@>D2*Al
The results obtained through this project are as follows :
(1) Two types of sensors with and w … More ithout beta-alumina membrane electrolyte in order to prevent from counter diffusion of ZnCl_2 through the electrolyte showed excellent reversibility, reproducibility above 100 mass ppm Al.
(2) Both sensors showed good agreement with each other, but the former showed better performance in start-up duration and its life time.
(3) Thermochemical properties of dilute Zn-Al and Zn-Fe-Al alloys were determined in order to evaluate activity coefficient of Al in molten Zn by EMF method using the composite electrolyte.
(4) The applicability of the present sensor with beta-alumina in CGL line test was proved, and relative error of 30 ppm around 1500 ppm Al and life time of 10 days as an average was performed.
(5) The life time was governed by adhesion of ZnO particles to electrolyte and the evaporation of AlCl_3.
(6) The sensor life time or the validity can be estimated by on-line monitoring of an ac impedance of the sensor.
(7) Through theoretical and experimental examinations, the present composite mixed salt electrolyte is proved to be valid for chemical sensors to measure concentration or chemical potential of a wide variety of component in molten metals and alloys, for example, Zn in molten Cd, Na in Al alloys, and so on. Less

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 山口 周ほか: "コンポジット溶融塩電解質を用いた溶融亜鉛メッキ浴用AIセンサー" 材料とプロセス. 4. 669-669 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 川村 三喜夫ほか: "亜鉛浴中アルミセンサーの実用化試験" 材料とプロセス. 5. 1406-1406 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 酒徳 篤ほか: "起電力法を用いたZn-Al-Fe合金の熱力学的性質" 材料とプロセス. 5. 1735-1735 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山口 周ほか: "溶融塩電解質を用いた金属成分センサー" 溶融塩. 36. 21-36 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山口 周ほか: "濃淡電池を用いた起電力法によるZn-AlおよびZn-Fe-Al合金の熱力学的性質の測定" 日本金属学会誌.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山口 周ほか: "Principle of the composite type mixed salt electrolyte for electrochemical sensors to measure concentration of metallic component in metals and alloys." Solid State Ionics.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shu Yamaguchi, Norihiko Fukatsu, Hideo Kimura, Jun, Ueda, Yoshiaki Iguchi, and Teruo Oh-hashi: "Development of Al Sensor for Molten Zn Bath Using Composite Salt Electrolyte." CAMP-ISIJ. Vol.4, No.2. 669 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Mikio Kawamura, Masa-aki Mori, Kohshi Tajima, Shu Yamaguchi, Norihiko Fukatsu, Hideo Kimura: "Development of Al-Sensor of Molten Zinc at No.5 CGL" CAMP-ISIJ. Vol.5, No.5. 1406 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Atsushi Sakatoku, Shu Yamaguchi, Norihiko Fukatsu, Yoshiaki Iguchi, and Teruo Oh-hashi, Hideo Kimura: "Thermodynamic Properties of Zn-Al-Fe Ternary Alloy by EMF Method." CAMP-ISIJ. Vol.5, No.5. 1735 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shu Yamaguchi and Norihiko Fukatsu: "Chemical Sensors Using Mixed Salt Electrolyte" Molten Salts. Vol.36, No.1. 21-36 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shu Yamaguchi, Atsushi Sakatoku, Norihiko Fukatsu, Hideo Kimura, Yoshiaki Iguchi, Teruo Oh-hashi: "Thermochemical properties of dilute Al-Zn and Al-Fe-Zn alloys by means of Galvanic cell using molten salt electrolyte." J.of JIM.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shu Yamaguchi, Atsushi Sakatoku, Norihiko Fukatsu, Hideo Kimura, Yoshiaki Iguchi, Teruo Oh-hashi: "Principle of the composite type mixed salt electrolyte for electrochemical sensors to measure concentration of metallic component in metals and alloys."

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1994-03-24  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi