Kazuki Kikuchi, M. Kobune, T. Kikuchi, T. Migita, Y. Haruna, S. Yae, N. Fukumuro
Ferromagnetic cobalt ferrite (CoFe2O4) thin films for magnetoelectric multiferroic applications were synthesized on (Bi3.25Nd0.65Eu0.10)Ti3O12/Nb:TiO2 substrates at reaction temperatures of 140190C using a non-aqueous sol-gel process. The magnetic properties of the films were measured, and the sample synthesized at 180C was found to exhibit the highest residual magnetization and coercivity of 1.5 emu/g and 134 Oe, respectively. The ferroelectric properties of all samples were similar, with a large remanent polarization of 5867 C/cm and a coercive field of 421462 kV/cm, regardless of the reaction temperature. Based on its magnetic and ferroelectric properties, the sample synthesized at 180C has potential as a practical multiferroic material.
{"title":"Structural, Magnetic and Electric Characteristics of Multiferroic CoFe2O4/BNEuT Composite Thin Films Produced by Non-aqueous Sol-gel Process","authors":"Kazuki Kikuchi, M. Kobune, T. Kikuchi, T. Migita, Y. Haruna, S. Yae, N. Fukumuro","doi":"10.14723/TMRSJ.43.105","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.105","url":null,"abstract":"Ferromagnetic cobalt ferrite (CoFe2O4) thin films for magnetoelectric multiferroic applications were synthesized on (Bi3.25Nd0.65Eu0.10)Ti3O12/Nb:TiO2 substrates at reaction temperatures of 140190C using a non-aqueous sol-gel process. The magnetic properties of the films were measured, and the sample synthesized at 180C was found to exhibit the highest residual magnetization and coercivity of 1.5 emu/g and 134 Oe, respectively. The ferroelectric properties of all samples were similar, with a large remanent polarization of 5867 C/cm and a coercive field of 421462 kV/cm, regardless of the reaction temperature. Based on its magnetic and ferroelectric properties, the sample synthesized at 180C has potential as a practical multiferroic material.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"49 1","pages":"105-108"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75279397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yuki Egami, Hata Soichiro, Seiken Kato, Sho Yamamoto, T. Nonami
In this study, the phosphorus adsorption ability of natural diopside in an aqueous solution of phosphoric acid was evaluated. The influence of calcium ions present in the aqueous solution and pH on the phosphorus adsorption capacity of diopside was investigated. Diopside was found to adsorb a significant amount of phosphorus in the calcium-rich solution. In addition, its phosphorus adsorption ability tended to improve in aqueous solution s with lower pHs. In such solutions, calcium was eluted to a large extent from diopside. The adsorption rate of phosphorus in an aqueous solution of diopside was highly correlated to calcium elution. For solutions with low pH, the calcium bound to the OH group interacts with H+ and the charge on diopside becomes more positive. With this increasing positive charge, it can more effectively adsorb the negatively charged phosphate ions. It was assumed that calcium reacts with the phosphate ions and forms calcium phosphate on the diopside surface. The amount of phosphorus adsorption is related to the elution of calcium from diopside. We also found that natural diopside could be used as a phosphorus adsorbent in aqueous solutions without the need for adding calcium or adjusting pH.
{"title":"Evaluation of the Phosphorus Adsorption Capacity of Natural Diopside in Aqueous Phosphoric Acid","authors":"Yuki Egami, Hata Soichiro, Seiken Kato, Sho Yamamoto, T. Nonami","doi":"10.14723/TMRSJ.43.97","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.97","url":null,"abstract":"In this study, the phosphorus adsorption ability of natural diopside in an aqueous solution of phosphoric acid was evaluated. The influence of calcium ions present in the aqueous solution and pH on the phosphorus adsorption capacity of diopside was investigated. Diopside was found to adsorb a significant amount of phosphorus in the calcium-rich solution. In addition, its phosphorus adsorption ability tended to improve in aqueous solution s with lower pHs. In such solutions, calcium was eluted to a large extent from diopside. The adsorption rate of phosphorus in an aqueous solution of diopside was highly correlated to calcium elution. For solutions with low pH, the calcium bound to the OH group interacts with H+ and the charge on diopside becomes more positive. With this increasing positive charge, it can more effectively adsorb the negatively charged phosphate ions. It was assumed that calcium reacts with the phosphate ions and forms calcium phosphate on the diopside surface. The amount of phosphorus adsorption is related to the elution of calcium from diopside. We also found that natural diopside could be used as a phosphorus adsorbent in aqueous solutions without the need for adding calcium or adjusting pH.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"32 1","pages":"97-100"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73037513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anodized titanium plates were produced as implant material, using powdered titanium oxide suspended in sulfuric acid aqueous solution electrolyte. Based on X-ray diffraction (XRD) and Auger electron spectrometry analyses, the formation of approximately 2800-nm-thick surface oxide film on titanium consisting of rutile and anatase phases was confirmed. This oxide film on titanium contained many submicron-size pores. The anodized titanium plate was immersed in simulated body fluid, and evaluated using scanning electron microscopy and XRD. Low-crystalline hydroxyapatite formed on the surface after seven days of immersion. In contrast, a 270-nm-thick oxide film was produced on titanium plate anodized in phosphoric acid aqueous solution. In this instance, no additional layer was observed on the surface even after seven days of immersion in simulated body fluid. The biocompatibility was presumed to have improved in the titanium plate anodized using titanium oxide suspended in sulfuric acid aqueous solution electrolyte, because of the formation of a thick oxide film that contained a large number of pores. This material was thus found to be promising for use in implants.
{"title":"Anodized Titanium Production Using Titanium Oxide Suspended in Sulfuric Acid Electrolyte and Evaluation of Hydroxyapatite Formation in Simulated Body Fluid","authors":"H. Shibata, Y. Kanie, Y. Kato, T. Nonami","doi":"10.14723/TMRSJ.43.65","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.65","url":null,"abstract":"Anodized titanium plates were produced as implant material, using powdered titanium oxide suspended in sulfuric acid aqueous solution electrolyte. Based on X-ray diffraction (XRD) and Auger electron spectrometry analyses, the formation of approximately 2800-nm-thick surface oxide film on titanium consisting of rutile and anatase phases was confirmed. This oxide film on titanium contained many submicron-size pores. The anodized titanium plate was immersed in simulated body fluid, and evaluated using scanning electron microscopy and XRD. Low-crystalline hydroxyapatite formed on the surface after seven days of immersion. In contrast, a 270-nm-thick oxide film was produced on titanium plate anodized in phosphoric acid aqueous solution. In this instance, no additional layer was observed on the surface even after seven days of immersion in simulated body fluid. The biocompatibility was presumed to have improved in the titanium plate anodized using titanium oxide suspended in sulfuric acid aqueous solution electrolyte, because of the formation of a thick oxide film that contained a large number of pores. This material was thus found to be promising for use in implants.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"6 1","pages":"65-70"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86516515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Conservation and Preservation of Cultural Properties Based on Spiritual Materials","authors":"G. Takaoka","doi":"10.14723/TMRSJ.43.35","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.35","url":null,"abstract":"","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"12 1","pages":"35-42"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85846970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Sugimoto, K. Kawamura, T. Kawaguchi, T. Tsuchiya, Chizuko Kudo, T. Higuchi
Amorphous WO3-x thin films with ~200 and ~600 nm thicknesses have been prepared on Pt/SiO2 substrates by RF magnetron sputtering. The mixed valence states of W6+ and W5+ are observed in the photoemission spectroscopy (PES) spectra of W 4d core level. The electrical conductivities exhibit the thermal activation-type behaviors in the temperature region of 100~200°C. The activation energies of 200 and 600 nm films are 0.1 and 0.6 eV, respectively. The band gaps (Eg) of 200 and 600 nm films are ~2.6 and ~2.0 eV, respectively. The expanded PES in the Eg region and X-ray absorption spectra exhibit the W 5d-DOS at the Fermi level and defect-induced state at the bottom of conduction band, respectively. The above results indicate that the conducting carrier of amorphous WO3-x thin film is closely related to the film thickness and oxygen vacancies.
{"title":"Electron-Ion Mixed Conduction of Amorphous WO3-x Thin Film Probed by Soft-X-Ray Spectroscopy","authors":"T. Sugimoto, K. Kawamura, T. Kawaguchi, T. Tsuchiya, Chizuko Kudo, T. Higuchi","doi":"10.14723/TMRSJ.43.101","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.101","url":null,"abstract":"Amorphous WO3-x thin films with ~200 and ~600 nm thicknesses have been prepared on Pt/SiO2 substrates by RF magnetron sputtering. The mixed valence states of W6+ and W5+ are observed in the photoemission spectroscopy (PES) spectra of W 4d core level. The electrical conductivities exhibit the thermal activation-type behaviors in the temperature region of 100~200°C. The activation energies of 200 and 600 nm films are 0.1 and 0.6 eV, respectively. The band gaps (Eg) of 200 and 600 nm films are ~2.6 and ~2.0 eV, respectively. The expanded PES in the Eg region and X-ray absorption spectra exhibit the W 5d-DOS at the Fermi level and defect-induced state at the bottom of conduction band, respectively. The above results indicate that the conducting carrier of amorphous WO3-x thin film is closely related to the film thickness and oxygen vacancies.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"43 1","pages":"101-104"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80076317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
[9] a) D. Parker and J. A. G. Williams, J. Chem. Soc., Perkin Trans. 2, 1305-1314 (1995); b) Y. Shiraishi, Y. Kohno, and T. Hirai, J. Phys. Chem. B, 109, 19139-19147 (2005). [10] a) H. Benesi and J. Hildebrand, J. Am. Chem. Soc., 71, 2703-2707 (1949); b) S. Alves, F. Pina, M. T. Albelda, E. García-España, C. Soriano, and S. V. Luis, Eur. J. Inorg. Chem., 405-412 (2001). [11] J. L. Ren, J. Zang. J. Q. Luo, X. K. Pei, and Z. X. Jiang, Analyst, 126, 698-702 (2001). Oxidation – Reduction Potentials of Hydroxyapatite Adhered Photocatalysts
{"title":"Oxidation – Reduction Potentials of Hydroxyapatite - Adhered Photocatalysts","authors":"K. Funakoshi, Yusuka Imaya","doi":"10.14723/TMRSJ.43.113","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.113","url":null,"abstract":"[9] a) D. Parker and J. A. G. Williams, J. Chem. Soc., Perkin Trans. 2, 1305-1314 (1995); b) Y. Shiraishi, Y. Kohno, and T. Hirai, J. Phys. Chem. B, 109, 19139-19147 (2005). [10] a) H. Benesi and J. Hildebrand, J. Am. Chem. Soc., 71, 2703-2707 (1949); b) S. Alves, F. Pina, M. T. Albelda, E. García-España, C. Soriano, and S. V. Luis, Eur. J. Inorg. Chem., 405-412 (2001). [11] J. L. Ren, J. Zang. J. Q. Luo, X. K. Pei, and Z. X. Jiang, Analyst, 126, 698-702 (2001). Oxidation – Reduction Potentials of Hydroxyapatite Adhered Photocatalysts","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"45 1","pages":"113-115"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91343248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yoshitaka Suzuki, Tomoya Kitagawa, Y. Namekawa, M. Matsukura, K. Nishikata, H. Mimura, K. Tsuchiya
The production of 99 Mo via a (n, γ ) reaction is a simple and easy method and is advantageous from the viewpoints of nuclear proliferation resistance and waste management. However, the production of 99 m Tc solutions with heavy levels of radioactivity is difficult because the specific radioactivity of 99 Mo produced via this method is extremely low. Thus, it is necessary to develop a novel adsorbent with high Mo-adsorption efficiency. In this study, alumina (Al 2 O 3 ), which is often used in medical 99 Mo/ 99 m Tc generators, was used as the Mo adsorbent. Al 2 O 3 specimens were prepared with three types of starting powders and sintered at different temperatures; in addition, their Mo adsorption and desorption properties were evaluated. The results indicated that the Mo-adsorption properties are influenced by the crystal structure and the specific surface of the Al 2 O 3 . In addition, the basic chemical properties of the solution eluted from each developed Al 2 O 3 specimen were within the limits given by the guidelines.
通过a (n， γ)反应生产99mo是一种简单易行的方法，从防核扩散和废物管理的角度来看是有利的。然而，生产具有高放射性的99m Tc溶液是困难的，因为通过这种方法生产的99mo的特定放射性极低。因此，有必要开发一种新型的高钼吸附效率吸附剂。本研究采用医用99 Mo/ 99 m Tc发生器中常用的氧化铝(al2o3)作为Mo吸附剂。采用三种起始粉末制备了al2o3试样，并在不同温度下进行了烧结;此外，还评价了它们对钼的吸附和解吸性能。结果表明，氧化铝的晶体结构和比表面影响其对钼的吸附性能。此外，从每个显影的al2o3样品中洗脱的溶液的基本化学性质都在指南规定的范围内。
{"title":"Molybdenum Adsorption and Desorption Properties of Alumina with Different Surface Structures for 99Mo/99 mTc Generators","authors":"Yoshitaka Suzuki, Tomoya Kitagawa, Y. Namekawa, M. Matsukura, K. Nishikata, H. Mimura, K. Tsuchiya","doi":"10.14723/TMRSJ.43.75","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.75","url":null,"abstract":"The production of 99 Mo via a (n, γ ) reaction is a simple and easy method and is advantageous from the viewpoints of nuclear proliferation resistance and waste management. However, the production of 99 m Tc solutions with heavy levels of radioactivity is difficult because the specific radioactivity of 99 Mo produced via this method is extremely low. Thus, it is necessary to develop a novel adsorbent with high Mo-adsorption efficiency. In this study, alumina (Al 2 O 3 ), which is often used in medical 99 Mo/ 99 m Tc generators, was used as the Mo adsorbent. Al 2 O 3 specimens were prepared with three types of starting powders and sintered at different temperatures; in addition, their Mo adsorption and desorption properties were evaluated. The results indicated that the Mo-adsorption properties are influenced by the crystal structure and the specific surface of the Al 2 O 3 . In addition, the basic chemical properties of the solution eluted from each developed Al 2 O 3 specimen were within the limits given by the guidelines.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"44 1","pages":"75-80"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76930489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Md. Nazmul Kayes, Jalil Miah, M. Shahabuddin, Michinori Karikomi, S. Yoshihara, E. Nasuno, N. Kato, K. Iimura
ACKNOWLEDGEMENTS The authors would like to thank the staff of TIARA accelerators at Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science for operating the tandem accelerator. They also thank Y. Matsuda for the GIXD measurements. The present study has been carried out under the collaboration program between Osaka Prefecture University, and National Institutes for Quantum and Radiological Science, and the collaboration program between Osaka Prefecture University and TransRegional Corporation Center for Industrial Materials Research, Institute for Materials Research, Tohoku University
{"title":"Dihydroxy-hexahelicene in Thin Films; Structural Characterization and Photoelectrochemical Properties","authors":"Md. Nazmul Kayes, Jalil Miah, M. Shahabuddin, Michinori Karikomi, S. Yoshihara, E. Nasuno, N. Kato, K. Iimura","doi":"10.14723/TMRSJ.43.57","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.57","url":null,"abstract":"ACKNOWLEDGEMENTS The authors would like to thank the staff of TIARA accelerators at Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science for operating the tandem accelerator. They also thank Y. Matsuda for the GIXD measurements. The present study has been carried out under the collaboration program between Osaka Prefecture University, and National Institutes for Quantum and Radiological Science, and the collaboration program between Osaka Prefecture University and TransRegional Corporation Center for Industrial Materials Research, Institute for Materials Research, Tohoku University","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"50 1","pages":"57-60"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84957669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Relationship between Elasticity and Contraction Force in Conducting Polymer; Polyaniline Softactuator","authors":"K. Kaneto, Hiroki Takahashi, Fumito Hata, S. Uto","doi":"10.14723/TMRSJ.43.61","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.61","url":null,"abstract":"","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"81 1","pages":"61-64"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83246817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Local Structure Analysis of KNbO3 Nanocrystals with Cubic Shape","authors":"Y. Yoneda, Ryoichi Kunisada, Tsukasa Chikada, S. Ueno, K. Ohara, S. Wada","doi":"10.14723/TMRSJ.43.93","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.93","url":null,"abstract":"Yasuhiro Yoneda, Ryo-ichi Kunisada1, Tsukasa Chikada1, Shintaro Ueno1, Koji Ohara2, and Satoshi Wada1 Reaction Dynamics Research Division, Japan Atomic Energy Agency (JAEA), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148 Fax: 81-791-58-2620, e-mail: yoneda@spring8.or.jp 1 Graduate School, Department of Interdisciplinary, University of Yamanashi, 4-4-37, Takeda, Kofu, Yamanashi 400-8510 2Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"22 1","pages":"93-96"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84261404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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