Transactions-Materials Research Society of Japan最新文献

{"title":"Precision Synthesis of Telechelic Poly(N-isopropylacrylamide) with Thiol-Termini for Construction of Homogeneous Network by Thiol-Ene End-Crosslinking","authors":"Shohei Ida, Masamitsu Yamawaki, T. Maruta, Y. Hirokawa","doi":"10.14723/TMRSJ.43.71","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.71","url":null,"abstract":"","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"60 1","pages":"71-74"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83769559","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":"Thermoelectric Properties of Mo and Ge co-substituted CrSi2","authors":"Hayato Nakasawa, T. Takamatsu, Yoshihiko Iijima, K. Hayashi, Y. Miyazaki","doi":"10.14723/TMRSJ.43.85","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.85","url":null,"abstract":"The thermoelectric properties of Mo and Ge co-substituted CrSi 2 have been investigated. Polycrystalline samples of (Cr 1− x Mo x )Si 2 ( x = 0, 0.02, 0.04, 0.06, 0.08, and 0.10) and (Cr 0.92 Mo 0.08 )(Si 1− y Ge y ) 2 ( y = 0, 0.01, and 0.02) were prepared by the two-step arc-melting method followed by spark plasma sintering and annealing. Powder X-ray diffraction confirmed that single-phase (Cr 1− x Mo x )(Si 1− y Ge y ) 2 samples were obtained. Mo and Ge co-substitution in CrSi 2 resulted in both an increase in the power factor and a large decrease in the thermal conductivity, which resulted in a high figure-of-merit ( zT ) value for the (Cr 0.92 Mo 0.08 )(Si 0.99 Ge 0.01 ) 2 sample ( zT = 0.29 at 700 K). This zT value is the highest reported value for CrSi 2 -based thermoelectric materials.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"22 1","pages":"85-91"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75824925","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":"2-Hydroxytryptanthrin and 1-Formyl-2-hydroxytryptanthrin as Fluorescent Metal-ion Sensors and Near-infrared Fluorescent Labeling Reagents","authors":"J. Kawakami, Y. Kinami, Masahiro Takahashi, S. Ito","doi":"10.14723/TMRSJ.43.109","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.109","url":null,"abstract":"140190C. As can be seen, the leakage current density for all samples is less than 110-5 A/cm2 under an applied field of up to 150 kV/cm, indicating excellent electrical insulation properties. Furthermore, the point at which electrical breakdown occurs shifts to lower electric field as the reaction temperature decreases from 140 to 160°C. The samples produced at 180 and 190°C exhibited strong electrical insulation properties even under a high applied field of up to 300 kV/cm. Figure 7 shows room-temperature P–E hysteresis loops for a sample with a CFO layer synthesized at 180C, and a sample with no CFO layer. Both samples exhibit good hysteresis loop shapes with excellent symmetry. The values of 2Pr (6365 C/cm2) and the coercive field (2Ec: 443445 kV/cm) are the same for both samples within the experimental error. This demonstrates that the nonaqueous sol-gel process is an effective method for introducing fine ferromagnetic particles into the nanospaces between the ferroelectric plates without degrading their electrical properties. The dependence of the room-temperature 2Pr and 2Ec values on the CFO synthesis temperature is shown in Fig. 7(c). 2Pr and 2Ec are seen to be almost constant at 5867 C/cm2 and 421462 kV/cm, respectively, regardless of the reaction temperature. In particular, the 2Pr values are comparable to that for Pb(Zr,Ti)O3, which is currently used in ferroelectric non-volatile memory applications, indicating that the performance level is practical. It can therefore be concluded that the optimal reaction temperature for depositing fine CFO particles on BNEuT/Nb:TiO2 substrates by the non-aqueous sol-gel process is 180°C, from the viewpoints of the structural, magnetization magnetic field, ferroelectric, and leakage current characteristics. 4. CONCLUSION Ferromagnetic CFO thin films were synthesized on (Bi3.25Nd0.65Eu0.10)Ti3O12/Nb:TiO2 substrates at reaction temperatures of 140190C using a non-aqueous sol-gel process. The magnetic properties of the films were measured, and the sample synthesized at 180C 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 5867 C/cm2 and a coercive field of 421462 kV/cm, regardless of the reaction temperature. Based on its magnetic and ferroelectric properties, it can be concluded that the sample synthesized at 180C has potential as a practical multiferroic material.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"19 1","pages":"109-112"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90873085","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":"In situ Observation of 15 mol% Ba-Substituted Strontium Tantalate up to 1773 K by Ultraviolet Laser Raman Spectroscopy","authors":"H. Fujimori, Ippei Kawanishi, N. Matsushita","doi":"10.14723/TMRSJ.43.7","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.7","url":null,"abstract":"Raman spectra of 15 mol% Ba-substituted Sr2Ta2O7 have been successfully obtained at temperatures up to 1773 K by a continuous-wave ultraviolet Raman spectroscopic system. The Raman spectra do not change significantly with an increase in temperature, despite the P21  Cmcm transition. The present result is described in terms of the parameter related to temperature variation at constant pressure, defined in a similar way to the Gruneisen parameter. Raman bands located above 220 cm show smaller values of the parameter than lower frequency modes, suggesting that these higher frequency modes are assigned to TaO6 internal modes. Due to the strong Ta—O chemical bonds, the dipole moments in the TaO6 octahedra and the ferroelectric polarization in the whole crystal lattice can be induced by the Ba substitution without large deviation of the Ta—O—Ta bond angles from 180, which enhances the photocatalytic performance.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"30 1","pages":"7-12"},"PeriodicalIF":0.0,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76894766","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":"Preparations and Characterizations of Carboxymetylated Hydrophilic Macromolecular Composites Directly Derived from Weeds","authors":"Mitsuru Aoyagi, Kento Maesono","doi":"10.14723/TMRSJ.43.31","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.31","url":null,"abstract":"","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"1 1","pages":"31-34"},"PeriodicalIF":0.0,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80393471","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":"Preparation of metal doped SiO2 films by magnetron sputtering deposition using metal oxide mixture powder target","authors":"Hiroharu Kawasaki, T. Ohshima, Y. Yagyu, T. Ihara, M. Shinohara, Y. Suda","doi":"10.14723/TMRSJ.43.27","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.27","url":null,"abstract":"Direct carboxymethylations for aliphatic hydroxyl groups in weeds such as Tall fescue (Festuca arundinacea, TF), Sweeping lovegrass (Eragrostis curvula, SL) and Canada goldenrod (Solidago Canadensis, CG) were carried out in 2-propanol / 30 % NaOH at 55 oC for 3.5 hrs. Under the typical conditions, carboxyletylated TF (TF-CM), SL-CM and CG-CM were obtained at yields of 145%, 135% and 148% based on each dry weight of lignocellulosics, respectively. Although degrees of substitutions of these CM materials were only small values such as 0.08-0.11, almost all materials were easily dissolved into water. Structural features were investigated using FT-IR and UV-Vis. Visocosities of 1% (w/w) aqueous solutions or suspensions of CM derivatives were measured by vibrating viscometer under different temperatures and pH. Since there are differences on viscosities between TF and CG in spite of same degrees of substitution, properties were different due to different structures of plant tissues.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"26 1","pages":"27-30"},"PeriodicalIF":0.0,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77555151","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":"Thermoelectric properties of olivine-type sulfides Tm2XS4 (Tm = Mn, Fe, X = Si, Ge)","authors":"H. Nagai, K. Hayashi, Y. Miyazaki","doi":"10.14723/TMRSJ.43.13","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.13","url":null,"abstract":"Polycrystalline olivine-type sulfides, Mn2SiS4, Mn2GeS4, Fe2SiS4, and Fe2GeS4, are prepared by solid-state reactions and spark plasma sintering. Among these sulfides, only the electrical conductivities and Seebeck coefficients of Fe2SiS4 and Fe2GeS4 are measurable, owing to their narrower energy gaps compared with those of Mn2SiS4 and Mn2GeS4. Although Fe2SiS4 and Fe2GeS4 exhibit low electrical conductivities, their Seebeck coefficients and thermal conductivities are relatively high and low, respectively, demonstrating their potential as good thermoelectric materials. The highest zT value, 0.008, is obtained for Fe2GeS4 at 700 K, which can be enhanced by hole carrier doping and heavy elemental partial substitution.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"31 1","pages":"13-17"},"PeriodicalIF":0.0,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82936440","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":"The structure and microwave dielectric properties of Li2MoO4-SiO2 ceramics without addition of glass as sintering aids","authors":"Yuanming Lai, Xiaoli Tang, Huaiwu Zhang, Xiaofeng Liang, Xin Huang, Jie Li, Hua Su","doi":"10.14723/TMRSJ.43.1","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.1","url":null,"abstract":"","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"42 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85766063","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":"Fabrication and Output Power Characteristics of a Pulley-type SMA Heat-engine Including the Idler Wheel with a Cooling System","authors":"T. Akagi, Chikara Nakagawa, Y. Takeda, Hiroki Cho","doi":"10.14723/TMRSJ.43.23","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.23","url":null,"abstract":"","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"122 1","pages":"23-26"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86443165","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":"Effects of heating/cooling-water temperatures on output power characteristics of forced cooling pulley-type SMA heat-engine","authors":"T. Tsuda, Chikara Nakagawa, Y. Takeda, Hiroki Cho","doi":"10.14723/TMRSJ.43.81","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.81","url":null,"abstract":"In this research, the effects of heating/cooling water temperatures of a heat engine on the output characteristics of the forced cooling pulley-type SMA heat-engine is investigated for the purpose of operating temperature optimization of the engine. The engine output increases almost linearly as the heating water temperature (TH) rises. On the other hand, the engine output shows a gradual decrease as the temperature of SMA element during cooling (TSMA) rises to 321.4 K and then an abrupt decrease when the TSMA = 322.7 K. Thermal cycling tests under constrained strain conditions for the SMA element were carried out to investigate the effect of heating/cooling temperatures to generation stress () and reaction velocity (VR) of the SMA element. In result,  increases gradually with the increase of TH. Besides, VR increases almost linearly as TH increases. This result suggests that the increase of engine output as TH increases is mainly due to the increase of the VR. Meanwhile, VR increases gradually with the increase of TSMA. Besides,  increases as TSMA rise up to 318 K, above which it decreases rapidly. From these results, it may be concluded that the contributing factor to the engine output is the variation of  and VR with the variation of TSMA.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"90 1","pages":"81-84"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84574903","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}