文献一覧: 公益社団法人日本セラミックス協会 (出版者)

2 0 0 0 OA Anisotropic growth of zinc oxide pillars on silver nanoparticles by oblique angle deposition

著者: Shunsuke MURAI Tomohiko MATOBA Christopher T. NELSON Takuya KOMINE Koji FUJITA Xiaoqing PAN Katsuhisa TANAKA
出版者: 公益社団法人日本セラミックス協会
雑誌: Journal of the Ceramic Society of Japan (ISSN:18820743)
巻号頁・発行日: vol.121, no.1416, pp.710-713, 2013-08-01 (Released:2013-08-01)
参考文献数: 21

We have prepared composites with anisotropic microstructure consisting of silver nanoparticles and zinc oxide pillars using an oblique angle deposition technique, and examined the optical response originating from their anisotropic morphology. The sample was obtained in three steps. First, the assembly of silver nanoparticles was prepared on a silica glass substrate by electron-beam deposition of the silver thin film and subsequent heat treatment. Next, zinc oxide was obliquely grown by using a pulsed laser deposition. Finally the zinc oxide was crystallized by the post annealing to make an array of inclined pillars grown on the top of the silver nanoparticles. The structure and morphology of the composites were elucidated by a combination of X-ray diffraction analysis and transmission electron microscopy. Optical rotation spectroscopy clarifies that the composite shows optical birefringence due to its inclined pillar morphology. The optical rotation spectrum exhibits two peaks, one being associated to the localized surface plasmon resonance of the silver nanoparticles and the other the excitons in the zinc oxide pillars. The present fabrication method is simple and can be applied to obtain anisotropic composites with relatively large dimensions.

2013-09-24 13:08:00
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2 0 0 0 OA 雜録

出版者: 公益社団法人日本セラミックス協会
雑誌: 大日本窯業協會雑誌 (ISSN:03669998)
巻号頁・発行日: vol.37, no.436, pp.166-167, 1929-04-01 (Released:2010-04-30)

2013-02-05 15:49:47
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2 0 0 0 OA 雜報

出版者: 公益社団法人日本セラミックス協会
雑誌: 大日本窯業協會雑誌 (ISSN:03669998)
巻号頁・発行日: vol.32, no.376, pp.150-159, 1924-04-20 (Released:2010-04-30)

2012-05-15 19:34:00
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1 0 0 0 OA 衛生陶器の現状と将来

著者: 江副勇馬
出版者: 公益社団法人日本セラミックス協会
雑誌: 窯業協會誌 (ISSN:00090255)
巻号頁・発行日: vol.73, no.840, pp.C464-C471, 1965-08-01 (Released:2010-04-30)

2023-10-25 16:49:52
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1 0 0 0 OA Adjustment of GDC layer microstructure and its influence on the electrochemical properties of microtubular SOFCs

著者: Karina Maria PACIEJEWSKA Yi YU Sascha KÜHN Andreas WEBER Matthias KLEBER
出版者: 公益社団法人日本セラミックス協会
雑誌: Journal of the Ceramic Society of Japan (ISSN:18820743)
巻号頁・発行日: vol.123, no.1436, pp.171-177, 2015-04-01 (Released:2015-04-01)
参考文献数: 15
被引用文献数: 6 7

The development of a dense chemical reaction blocking layer (CRBL) for micro-tubular solid oxide fuel cells (SOFC) was the aim of this study. The electrochemical performance and stability of SOFCs were also investigated since they strongly depend on fabrication conditions for the electrolyte and CRBL layers. Slurries of two commercial Ce0.8Gd0.2O1.90 powders were prepared and deposited by dip coating onto micro-tubular SOFCs. The results indicate that the layer density and homogeneity are essentially determined by the width of particle size distribution (PSD) apart from the colloidal stability. Two methods were applied for achieving a narrow PSD additional to dispersion: grinding and centrifugation. Particles with a very narrow PSD obtained through centrifugation process could be sintered together even at 1300°C and a layer with a density close to 99% could be reached. In contrast, simple ultrasonic dispersion of powders diminished the distribution width insufficiently and gave porous layer. Impedance measurements showed clear relationship between GDC layer density and ohmic resistance of the cells which directly correlates to their performance with a power density 0.75 W/cm2 at 0.7 volt and OCV~1.06 V obtained at 850°C for the cells with the densest GDC layer.

2023-08-31 11:35:05
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1 0 0 0 OA CaO-Al2O3-SO3系仮焼粉末による水溶液中のウランの回収

著者: 牧俊夫矢野正行
出版者: 公益社団法人日本セラミックス協会
雑誌: 窯業協會誌 (ISSN:00090255)
巻号頁・発行日: vol.89, no.1035, pp.585-594, 1981-11-01 (Released:2010-04-30)
参考文献数: 22
被引用文献数: 1 1

硫酸アルミニウムと塩化アルミニウムの水溶液及び消石灰乳液を種々の割合に混合することによって, 主にエットリンジャイト (6CaO・Al2O3・3SO3・32H2O) からなる白色のケーキを作製した. 次にそのケーキを500℃及び600℃で仮焼し, 粉砕して80-200メッシュの粒度をもつ試料を調製した. 2.9CaO・Al2O3l・4SO3または2.5CaO・Al2O3・1.2SO3の酸化物組成をもつ仮焼粉末は, 粒子強度とウランに対する捕集速度がかなり大きかった. すなわち U(VI) イオンの100ppmを主に[UO2(CO3)3]4-の形で含むアルカリ水溶液の50ml中に, それらの粉末の0.100gを2時間浸漬したとき, それらの試料は溶液中に存在するU(VI) イオンの80-100%を捕集した. 捕集したウランは60℃に保った5% NaHCO3溶液中に試料を1時間浸漬する方法で脱着させることができる.捕集前後の上記粉末のX線回折分析及び試料粉末を浸漬したときに起こる純水及び吸着液のpHの変化から, 本試料によるウランの捕集は, 試料の加水分解により生成するCa(OH)2と吸着液中の[UO2(CO3)3]4-イオンが反応して試料表面に二ウラン酸カルシウム (CaU2O7) が生成するために起こること, また脱着はCaU2O7と上記NaHCO3溶液が反応してU(VI) がもとの[UO2(CO3)3]4-イオンに戻るために起こることを明らかにした.

2023-07-15 22:43:50
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1 0 0 0 OA 風化花崗岩に含まれる粘土とその窯業原料としての利用

著者: 陣内和彦
出版者: 公益社団法人日本セラミックス協会
雑誌: 窯業協會誌 (ISSN:00090255)
巻号頁・発行日: vol.82, no.948, pp.454-461, 1974-08-01 (Released:2010-04-30)
参考文献数: 10
被引用文献数: 1

Recently, big increase of ceramic product has brought the great consumption of its materials. The author has tried to obtain the ceramic clay from the weathered granitic rocks. At first the forming process and containing situation of clay minerals were surveyed on various rocks at each step of weathering, and then the selection of suitable raw material and extracting method of ceramic clay were investigated.The results of this study are summarized as follows:(1) Among the constituent minerals of granitic rocks, plagioclase and biotite are altered most easily by weathering and kaoline, gibbsite, vermiculite etc. are formed and contained in the weathered rocks.(2) Kaoline is contained in all kinds of weathered and decomposed granitic rocks, even in the rather coarse size range of about 100-150micron.(3) The clay from so called “masatsuchi” can be used as a material of ceramics. Especially, the extremely weathered but not contaminated one provides the clay of higher grade in good yield.(4) In order to get the clay of high quality from the weathered granitic rocks, raw material should be scrubbed softly in water, and the cut size of clay should be as fine as possible. And clay can be made higher grade through magnetic separation.

2023-06-24 02:28:44
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1 0 0 0 OA 化學磁器と耐火煉瓦の搖籃期を語る

著者: 新村信太郎河島千尋稻生謙次
出版者: 公益社団法人日本セラミックス協会
雑誌: 窯業協會誌 (ISSN:00090255)
巻号頁・発行日: vol.59, no.659, pp.221-224, 1951-05-01 (Released:2010-04-30)

2023-04-14 05:29:24
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1 0 0 0 OA 本邦における高アルミナ質耐火煉瓦製造技術の変遷

著者: 浮洲武彦
出版者: 公益社団法人日本セラミックス協会
雑誌: 窯業協會誌 (ISSN:00090255)
巻号頁・発行日: vol.66, no.753, pp.C347-C350, 1958-09-01 (Released:2010-04-30)

2023-02-26 14:09:12
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1 0 0 0 OA ガラスの放射線着色に対するセリウムの着色防止機構について

著者: 曽我直弘田代仁
出版者: 公益社団法人日本セラミックス協会
雑誌: 窯業協會誌 (ISSN:00090255)
巻号頁・発行日: vol.70, no.797, pp.143-147, 1962-05-01 (Released:2010-04-30)
参考文献数: 15
被引用文献数: 7 7

Glasses containing various amount of trivalent cerium ion (20K2O, 10BaO, 70SiO2, 0.1CeO2, and 0-0.2 Si (mole %)) were first exposed to γ-radiation until they were colored to the same degree, and then, the fading of their color occured with the lapse of time was measured. The content of Ce3+ ion in these glasses was also measured by the spectrophotometric method in order to obtain a relation between its content in the glasses and the fading velocity of their γ-ray induced color. The result showed that the higher the content of Ce3+ ion in the glass is, the higher the fading velocity of its color is.On the basis of this result and the results of the spectrophotometric studies on the cerium-containing glasses so far made by the authors (J. Ceram. Assoc. Japan, 68, 132; 169 (1960)), the authors gave their view on the role of Ce3+ ion in preventing the γ-ray induced coloration of glass: Being excited by γ-ray irradiation, oxygen ions in glass loose some of their electrons. The Ce3+ ions give their weak-bonded 4 f-electrons to the oxygen ions, thus preventing the formation of V-center like defects in glass. At the same time, the Ce3+ ions, now holding positive holes as the result of their lending their 4 f-electrons to the oxygens, catch the ionized electrons that would be trapped or were already trapped by oxygen ion vacancies, thus preventing the formation of F-center like defects in glass. The total function of the Ce3+ ion in glass under γ-ray irradiation is, therefore, the recombination of the positive holes and the ionized electrons, thus preventing the formation of color centers.