发布求助
文献互助 智能选刊 最新文献

Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy最新文献

筛选
英文 中文
The Contact Charge Densities of 4s Electrons of Fe Impurity Atom in Some Transition and Noble Metals(Physics) 某些过渡金属和贵金属中Fe杂质原子的4s电子接触电荷密度(物理学)
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1974-12-01 DOI: 10.1051/JPHYSCOL:1974625
T. Shinohara, M. Fujioka, H. Onodera, K. Hisatake, Hisao. Yamamoto, Hiroshi Watanabe
{"title":"The Contact Charge Densities of 4s Electrons of Fe Impurity Atom in Some Transition and Noble Metals(Physics)","authors":"T. Shinohara, M. Fujioka, H. Onodera, K. Hisatake, Hisao. Yamamoto, Hiroshi Watanabe","doi":"10.1051/JPHYSCOL:1974625","DOIUrl":"https://doi.org/10.1051/JPHYSCOL:1974625","url":null,"abstract":"The internal conversion electrons from M and N shells of the 14.4 keV transition of 57Fe diffused into Cr, Ni, Cu, Pt and Au substrates were measured using a high-resolution &ray spectrometer. From relative intensities of conversion electrons analyzed using a deconvolution method, we deduced the contact charge density of 4s electrons p ~ , ( 0 ) of s7Fe impurity atom in these host metals. The 4s contact charge density of 57Fe embedded in these host metals, as well as Fe and Co metals, is found to be nearly equal. This fact indicates that the 3s contact charge density ~3s(0) plays an important role in the variation of the isomer shift of 57Fe in these alloys.","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"4 1","pages":"361"},"PeriodicalIF":0.0,"publicationDate":"1974-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74571994","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}
引用次数: 0
Kinetic Theory of Precipitation Processes in Solid Solutions. III(Physics) 固溶体中沉淀过程的动力学理论。三世(物理)
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1974-10-01 DOI: 10.1080/14786437408207241
M. Koiwa
{"title":"Kinetic Theory of Precipitation Processes in Solid Solutions. III(Physics)","authors":"M. Koiwa","doi":"10.1080/14786437408207241","DOIUrl":"https://doi.org/10.1080/14786437408207241","url":null,"abstract":"Abstract The formation of precipitate particles in solid solutions is studied by regarding the process as comprising chain reactions, where the collision of two single solute atoms initiates the clustering. Calculations are greatly simplified if back-reactions, i.e. the decomposition of once-formed particles, are completely neglected. The reaction constant for particle growth are considered to be dependent on the size of particles, and the dependence is different for different growth mechanisms. The kinetics are examined for the two cases, size-independent and size-dependent (proportional to the number of solute atoms in the respective particle) reaction constants; the behaviour of actual systems may be inferred from the results of these two imaginary cases. The resultant distribution of particle size is very different for the two cases, especially when the rate for the initiation of the chain reactions is slow in comparison to those for subsequent reactions; for the latter case (size-dependent) the distr...","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"23 1","pages":"174-175"},"PeriodicalIF":0.0,"publicationDate":"1974-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81162553","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}
引用次数: 9
Order-Disorder Transformation of Oxygen Atoms Dissolved in Zirconium Studied by Neutron Diffraction(Physics) 中子衍射研究锆中溶解氧原子的有序-无序转变(物理)
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1974-05-16 DOI: 10.1002/PSSA.2210230138
M. Hirabayashi, S. Yamaguchi, T. Arai, H. Asano, S. Hashimoto
{"title":"Order-Disorder Transformation of Oxygen Atoms Dissolved in Zirconium Studied by Neutron Diffraction(Physics)","authors":"M. Hirabayashi, S. Yamaguchi, T. Arai, H. Asano, S. Hashimoto","doi":"10.1002/PSSA.2210230138","DOIUrl":"https://doi.org/10.1002/PSSA.2210230138","url":null,"abstract":"Neutron diffraction experiments have been made to reveal the nature of the interstitial order-disorder transformation in the ZrO system using single crystals. The disordering transition of the alloy with O/Zr ⪅ 0.3 occurs below 450 °C, while in the composition O/Zr = 0.3 to 0.4 the disordering undergoes stepwise in such a way that the stacking sequence of the oxygen-atom layers changes below 600 °C and subsequently the ordered distribution in the layers becomes random. A tentative phase diagram is proposed on the basis of the present results. \u0000 \u0000 \u0000 \u0000Neutronen-Beugungsversuche wurden zur Klarung des Ordnung–Unordnungs-Uberganges von Sauerstoffatomen auf Zwischengitterplatzen im ZrO-System mit Einkristallen durchgefuhrt. Die Umwandlung der Legierungen mit O/Zr ⪅ 0,3 tritt unterhalb 450 °C auf, jedoch fur Legierungen mit O/Zr = 0,3 bis 0,4 zweistufig in einer Weise, das sich die Stapelfolge der Sauerstoffatomflachen unterhalb 600 °C andert und darauf die Verteilung der Sauerstoffatomschichten ungeordnet wird. Auf Grund der Ergebnisse wird versuchsweise ein Zustandsdiagramm vorgeschlagen.","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"325 1","pages":"173-173"},"PeriodicalIF":0.0,"publicationDate":"1974-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74744989","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}
引用次数: 27
Effect of Dislocations on the Low Temperature Thermal Conductivity in Germanium(Physics) 位错对锗低温导热系数的影响(物理)
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1974-04-15 DOI: 10.1143/JPSJ.36.1075
K. Sumino, Shoichi Kodaka, K. Kojima
{"title":"Effect of Dislocations on the Low Temperature Thermal Conductivity in Germanium(Physics)","authors":"K. Sumino, Shoichi Kodaka, K. Kojima","doi":"10.1143/JPSJ.36.1075","DOIUrl":"https://doi.org/10.1143/JPSJ.36.1075","url":null,"abstract":"The thermal conductivity vs temperature relation in deformed germanium single crystals is measured in the temperature range from 1.5 to 30 K. The results are analysed on the basis of the Callaway model. Klemens' theory on the scattering of phonons due to the static strain field of dislocations accounts for the experimental results reasonably well. The dislocation densities deduced from the thermal conductivity data are greater than those counted by direct observation of dislocations by factors less than 3.7 and 2.1 in specimens deformed to stage I and stage II, respectively. Discrepancies between the theoretical curves and the experimental curves are found at temperatures around 20 K and below 2.2 K. The former is accounted for by assuming that point-defect like imperfections have been introduced into specimens during deformation, while the latter could be attributed to the scattering of phonons due to dangling electrons located at the dislocation core.","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"329 1","pages":"353-354"},"PeriodicalIF":0.0,"publicationDate":"1974-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76143335","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}
引用次数: 24
Crystallization of an Amorphous Oxide in La-Nb-O System La-Nb-O体系中非晶氧化物的结晶
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1974-03-05 DOI: 10.1246/CL.1974.221
S. Yajima, K. Okamura, T. Shishido
{"title":"Crystallization of an Amorphous Oxide in La-Nb-O System","authors":"S. Yajima, K. Okamura, T. Shishido","doi":"10.1246/CL.1974.221","DOIUrl":"https://doi.org/10.1246/CL.1974.221","url":null,"abstract":"An amorphous oxide of which composition corresponds to La2O3·5Nb2O5was prepared by making use of an impact quenching technique. The phase transformation from an amorphous to an equilibrium crystalline state was studied by means of differential thermal analysis (DTA) and X-ray diffraction. From the experimental results, the crystallization process was characterized mainly by the two successive transitions, i.e., glassy phase → a new metastable phase → stable phase of La2O3·5Nb2O5.","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"34 1","pages":"86-87"},"PeriodicalIF":0.0,"publicationDate":"1974-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85123827","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}
引用次数: 4
Order-Disorder Transformations of Interstitial Solutes in Transition Metals of IV and V Groups IV和V族过渡金属中间隙溶质的有序-无序转变
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1974-01-01 DOI: 10.1007/978-3-642-80840-1_10
M. Hirabayashi, S. Yamaguchi, H. Asano, K. Hiraga
{"title":"Order-Disorder Transformations of Interstitial Solutes in Transition Metals of IV and V Groups","authors":"M. Hirabayashi, S. Yamaguchi, H. Asano, K. Hiraga","doi":"10.1007/978-3-642-80840-1_10","DOIUrl":"https://doi.org/10.1007/978-3-642-80840-1_10","url":null,"abstract":"","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"37 1","pages":"266-302"},"PeriodicalIF":0.0,"publicationDate":"1974-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91006288","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}
引用次数: 30
The Chemistry of Protactinium : X. A Study of the Effect of Chromium(II) on the Solvent Extraction of Protactinium(IV), Using N-Benzoyl-N-phenylhydroxylamine, Tri-n-octylamine and Thenoyltrifluoroacetone as the Extractants(Chemistry) 铬(II)对n-苯甲酰-n-苯基羟胺、三-正辛胺和壬基三氟丙酮溶剂萃取镤(IV)的影响研究(化学)
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1974-01-01 DOI: 10.1246/BCSJ.47.104
I. Kawasuji, Shin Suzuki
{"title":"The Chemistry of Protactinium : X. A Study of the Effect of Chromium(II) on the Solvent Extraction of Protactinium(IV), Using N-Benzoyl-N-phenylhydroxylamine, Tri-n-octylamine and Thenoyltrifluoroacetone as the Extractants(Chemistry)","authors":"I. Kawasuji, Shin Suzuki","doi":"10.1246/BCSJ.47.104","DOIUrl":"https://doi.org/10.1246/BCSJ.47.104","url":null,"abstract":"Cr(II) has been used for reducing protactinium in microquantities to the tetravalent state and for protecting it from re-oxidation. However, the effect of Cr(II) on the extraction behavior of Pa(IV) has not been taken into account by all of the previous investigators. On the basis of the above facts, the influence of Cr(II) on the extraction of Pa(IV) was studied by using such extractants as BPHA, TTA, and TOA. In every case, the distribution ratio of Pa(IV) decreased with an increase in the concentration of Cr(II) in the aqueous phase. One of the most reliable explanations for the phenomena is the possibility that a multi-nuclear complex between Pa(IV) and Cr(II) or Cr(III) is formed. However, the effect of Cr(II) on the absorption spectra of Pa(IV) could not be found, and many more experiments will be necessary to explain the effect of Cr(II) on the extraction behavior of Pa(IV).","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"44 1","pages":"182-183"},"PeriodicalIF":0.0,"publicationDate":"1974-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75805107","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}
引用次数: 1
Some Doping Effects on the Semiconducting Properties of Gd_2CuO_4 掺杂对Gd_2CuO_4半导体性能的影响
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1973-12-11 DOI: 10.1002/chin.197350022
T. Kenjo, S. Yajima
{"title":"Some Doping Effects on the Semiconducting Properties of Gd_2CuO_4","authors":"T. Kenjo, S. Yajima","doi":"10.1002/chin.197350022","DOIUrl":"https://doi.org/10.1002/chin.197350022","url":null,"abstract":"","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"54 1","pages":"161-161"},"PeriodicalIF":0.0,"publicationDate":"1973-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75522190","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}
引用次数: 0
Synthesis of Lanthanoid Aluminates (β-Al_2O_3 Type) Using Arc Plasma Flame 电弧等离子体火焰合成类镧铝酸盐(β-Al_2O_3型)
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1973-12-05 DOI: 10.1246/CL.1973.1331
S. Yajima, K. Okamura, T. Shishido
{"title":"Synthesis of Lanthanoid Aluminates (β-Al_2O_3 Type) Using Arc Plasma Flame","authors":"S. Yajima, K. Okamura, T. Shishido","doi":"10.1246/CL.1973.1331","DOIUrl":"https://doi.org/10.1246/CL.1973.1331","url":null,"abstract":"New compounds with approximate formulas, La2O2·7Al2O3, Pr2O3·7Al2O3, Nd2·8Al2O3 and Sm2O3·7Al2O3, have been obtained through melting by arc plasma flame and separated into their own single phases by a proper chemical treatment. All of the compounds have the β-Al2O3 type structure. Excepting only La2O3·7Al2O3, these compounds have the β-Al2O3, type structure at temperatures higher than 1500°C.","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"80 1","pages":"86"},"PeriodicalIF":0.0,"publicationDate":"1973-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84120029","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}
引用次数: 1
Quenched-in Vacancies in Molybdenum 钼中的淬火空位
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1973-10-01 DOI: 10.1080/14786437308220991
M. Suezawa, H. Kimura
{"title":"Quenched-in Vacancies in Molybdenum","authors":"M. Suezawa, H. Kimura","doi":"10.1080/14786437308220991","DOIUrl":"https://doi.org/10.1080/14786437308220991","url":null,"abstract":"Abstract Annealing experiments on quenched-in vacancies were performed with specially prepared high-purity molybdenum wire. The recovery stage was found to be centred at about 370°C, and the activation energy for the recovery was determined to be (1.62 ± 0.27) eV. The activation energy is tentatively considered to be the activation energy for the migration of single vacancies. With the activation energy, the loss of vacancies during quenching was discussed. The loss at the surface is found to be predominant. Correction for this loss was applied to the previously reported quenched-in resistivity results, and the formation energy of a vacancy was redetermined to be (3.24 ± 0.09) eV. These results are discussed in comparison with data on tungsten.","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"52 1","pages":"158"},"PeriodicalIF":0.0,"publicationDate":"1973-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74014676","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}
引用次数: 37
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信