result 229 件
| JaLCDOI | 10.18926/fest/11578 |
|---|---|
| Title Alternative | Consideration for the correlation between basicity of oxide glasses and chemical shift of O1s binding energy in XPS |
| FullText URL | 003_145_156.pdf |
| Author | Nanba, Tokuro| Miura, Yoshinari| |
| Abstract | Binding energy of O1s core electron measured in XPS is a candidate to determine new scale of Lewis basicity of oxide ion in glass. Some mathematical expressions for the basicity or XPS chemical shift, such as charge parameter and optical basicity, are compared with experimental O1s binding energy in binary alkali oxide glasses. The expressions so far in use need some modification in parameters. A new empirical expression introduced in this paper gives new concept and universal scale of basicity. |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 1998-01-14 |
| Volume | volume3 |
| Issue | issue1 |
| Start Page | 145 |
| End Page | 156 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313359 |
| JaLCDOI | 10.18926/fest/11541 |
|---|---|
| Title Alternative | Upconversion property and light scattering in Tm(3+)-doped glass-ceramics |
| FullText URL | 007_119_125.pdf |
| Author | Miura, Yoshinari| Ding, Yong| Murata, Takashi| Himei, Yusuke| Nanba, Tokuro| |
| Abstract | Glass-ceramics containing Pb(x)Cd(1-x)F(2) microcrystallites were prepared through heat treatment of Tm(3+)/Yb(3+)doped SiO(2)-Al(2)O(3)-PbF(2) glasses. The crystallite size was controlled by varying the heat-treatment time. By changing glass composition, two types of strong optical scattering, Rayleigh and Mie scattering modes were observed for the glass ceramics. In the case of Rayleigh scattering, the scattering region expanded to the long-wavelength side with increasing the heat-treatment time. On the other hand, in the case of Mie scattering, the region were hardly dependent on wavelength, and visible light was widely scattered. It was argued that the different scattering phenomena were caused by the different size of the crystallites or their morphogical texture. Furthermore, the glass-ceramics with strong optical scattering showed higher upconversion fluorescence intensity than the matrix glass. The mechanisms for the enhanced upconversion due to the scattering were discussed. |
| Keywords | Optical scattering Glass-ceramics Oxyfluoride glass Microcrystallite Upconversion fluorescence |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2002-03-22 |
| Volume | volume7 |
| Issue | issue1 |
| Start Page | 119 |
| End Page | 125 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313480 |
| JaLCDOI | 10.18926/fest/11538 |
|---|---|
| Title Alternative | Effects of ultrasonic treatment on the preparation of transparent glass-ceramic phosphor |
| FullText URL | 007_113_118.pdf |
| Author | Inoue, Teruhide| Nakashima, Mizuho| Nanba, Tokuro| Miura, Yoshinari| |
| Abstract | The effects of ultrasonic surface treatment (UST) on the crystallization behavior and optical emission properties were investigated for the transparent glass-ceramics prepared from calcium aluminosilicate glasses co-doped with Eu(2+), Nd(3+). The glass-ceramics A were prepared by sintering a glass 45CaO・45Al(2)O(3)・10SiO(2) (mol%) containing 0.5Eu(2)O(3)+1Nd(2)O(3) under a 2% H(2)+98% Ar reducing atmosphere. In the glass-ceramics A, three crystalline phases, CaAl(2)O(4) (CA), CaAl(4)O(7) (CA2) and Ca(2)Al(2)SiO(7) (CAS) were commonly confirmed by X-ray diffraction. No drastic change in the amount of the precipitated crystalline phases was observed even in the case using UST of CA powders. It was suggested that the optical emission properties of the glass-ceramics A was responsible for the CA2 crystals. The glass-ceramics B were also prepared from a 51CaO・42Al(2)O(3)・7SiO(2) glass. The CA crystals were separately precipitated in the glass-ceramics B. In particular, a large amount of CA was successfully produced by stirring the UST suspension to prevent the sedimentation of the UST particles. The glass-ceramic B so-prepared showed strong photoluminescence but weak phosphorescence compared with other glass-ceramics B, indicating that the photoluminescence and phosphorescence were originated in different electron-trapping levels. The amount of the trap levels associated with the long lasting phosphorescence, such as oxygen vacancies, was probably small in the glass-ceramic B prepared with the stirring UST. |
| Keywords | ultrasonic surface treatment (UST) surface crystallization glass-ceramics long lasting phosphorescence calcium aluminosilicate glass |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2002-03-22 |
| Volume | volume7 |
| Issue | issue1 |
| Start Page | 113 |
| End Page | 118 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313433 |
| JaLCDOI | 10.18926/fest/11528 |
|---|---|
| Title Alternative | Damage factors analysis for small embankment dams due to the Hyogoken-Nambu earthquake special to Hokudan Town |
| FullText URL | 007_055_074.pdf |
| Author | Fujii, Hiroaki| Kunimasa, Kana| Nanba, Akiyo| Yokomizo, Takayuki| Nishimura, Shin-ichi| Shimada, Kiyoshi| Hori, Toshio| Nishiyama, Tatsuro| Wakitani, Yoshiaki| |
| Abstract | This study was performed to clarify which factors affected damage to take-ike (small embankment dams for irrigation in Japanese) of Hokudan Town on Awaji Island in western Japan due to Hyogoken-Nambu earthquake. Multivariate and ordinary statistical analysis were carried out using documentary data (181 damaged and 328 undamaged dams), and ordinary one was done for the results investigated in situ. The model for the multivariate analysis was created with 13 items and 94 categories for 4 groups (Location, Geology Structure, and History of Dam). As a result, the factors causing to damage for dam are (1) the nearest fault (Nojima, Mizukoshi and D2), (2) embankment volume (the larger the more), (3) angle of crest axis to epicenter (diagonal and normal), (4) distance to the nearest fault (less than 500 m), (5) distance to the epicenter (8 to 14 km which almost agree to the location of seismic intensity 7 JMA), (6) play view of dam axis (3 or 4 axes), (7) angle of crest axis to nearest fault (diagonal and normal), (8) elevation of dam site (over 100 m), (9) surface geology of dam site (non-cohesive soil), (10) era of construction (prior to 1891), and (11) soil properties of embankment (constructed of sand, smaller penetration resistance). |
| Keywords | Earth dam earthquake damage site investigation statistical analysis case study |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2002-03-22 |
| Volume | volume7 |
| Issue | issue1 |
| Start Page | 55 |
| End Page | 74 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002314039 |
| JaLCDOI | 10.18926/fest/11476 |
|---|---|
| Title Alternative | Evaluation of Surface State of Ceramic Particles Suspended in Aqueous Solution by Potentiometric Titration Method |
| FullText URL | 009_153_162.pdf |
| Author | Miura, Yoshinari| Nanba, Tokuro| Shinoda, Masakatsu| |
| Abstract | Surface states of ceramic particles such as SiO(2), Al(2)O(3), Si(3)N(4) and so on suspended in aqueous alkaline solutions were successfully and easily determined by a potentiometric titration method. Isoelctric point, iep and excess surface charge density were classified and evaluated for many ceramic particles from the view points of aggregation and dispersion of particles and solubility in aqueous solution. |
| Keywords | potentiometric titration method isoelctric point excess surface charge density ceramic particle suspension aqueous solution |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2004-02-27 |
| Volume | volume9 |
| Issue | issue1 |
| Start Page | 153 |
| End Page | 162 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313753 |
| JaLCDOI | 10.18926/fest/11475 |
|---|---|
| Title Alternative | Material Recycling of Municipal Waste Slags by Using Phase Separation of Glass |
| FullText URL | 012_161_165.pdf |
| Author | Imaoka, Takuya| Sakida, Shinichi| Nanba, Tokuro| Miura, Yoshinari| |
| Abstract | A novel recycling process of municipal waste slags obtaining Fe-free colorless materials was developed by using a phase separation of borosilicate glass. B(2)O(3) was added to a simulated waste slag to promote the phase separation. The slag glasses were heat-treated above glass transition temperatures, from which phase separation was successfully induced. The phase-separated slag glasses were still colored in black due to Fe ions, and after soaking in acid, they were successfully bleached, obtaining colorless solids. According to compositional analyses, no Fe ions were confirmed in the remaining insolubles, indicating that Fe ions were preferentially incorporated into the borate-rich phases soluble in acid. The main constituent of the colorless solids was SiO(2) and the end products obtained in the present process were expected as an alternative of pure silica glass. |
| Keywords | slag recycling colorless glass phase separation |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2007-03-15 |
| Volume | volume12 |
| Issue | issue1 |
| Start Page | 161 |
| End Page | 165 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313957 |
| Author | Namba, Kazuhiko| |
|---|---|
| Published Date | 1996-02-01 |
| Publication Title | 岡山大学農学部学術報告 |
| Volume | volume85 |
| Issue | issue1 |
| Content Type | Departmental Bulletin Paper |
| Author | Ikeda, Yasumasa| Nanba, Syoji| Masuda, Masaharu| |
|---|---|
| Published Date | 1995-02-01 |
| Publication Title | 岡山大学農学部学術報告 |
| Volume | volume84 |
| Issue | issue1 |
| Content Type | Departmental Bulletin Paper |
| Author | Elbatawi, Ibrahim E. A.| Mohri, Kentaro| Namba, Kazuhiko| |
|---|---|
| Published Date | 1998-02 |
| Publication Title | 岡山大学農学部学術報告 |
| Volume | volume87 |
| Issue | issue1 |
| Content Type | Departmental Bulletin Paper |
| Author | Chen, Yong Bo| Mohri, Kentaro| Namba, Kazuhiko| |
|---|---|
| Published Date | 1998-02 |
| Publication Title | 岡山大学農学部学術報告 |
| Volume | volume87 |
| Issue | issue1 |
| Content Type | Departmental Bulletin Paper |
| Author | Liu, Houqing| Mohri, Kentaro| Namba, Kazuhiko| |
|---|---|
| Published Date | 1998-02 |
| Publication Title | 岡山大学農学部学術報告 |
| Volume | volume87 |
| Issue | issue1 |
| Content Type | Departmental Bulletin Paper |
| Author | Ta, Na| Mohri, Kentaro| Namba, Kazuhiko| Monta, Mitsuji| |
|---|---|
| Published Date | 2003-02 |
| Publication Title | 岡山大学農学部学術報告 |
| Volume | volume92 |
| Issue | issue1 |
| Content Type | Departmental Bulletin Paper |
| Author | Nanba, Koichi| |
|---|---|
| Published Date | 2004-03-25 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | Namba, Katsuyuki| |
|---|---|
| Published Date | 2005-03-25 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | 難波 治| |
|---|---|
| Published Date | 1992-03-28 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | 難波 明博| |
|---|---|
| Published Date | 2003-03-25 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | 難波 淳子| |
|---|---|
| Published Date | 2001-03-25 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | 難波 良文| |
|---|---|
| Published Date | 1997-03-31 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | 難波 良司| |
|---|---|
| Published Date | 1962-03-31 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | 難波 祐三郎| |
|---|---|
| Published Date | 2000-03-25 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
