文献一覧: 窯業協會誌 (雑誌)

1 0 0 0 OA シラスを原料とする微細中空ガラス球(シラスバルーン)について

著者: 木村邦夫陣内和彦諌山幸男
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:18842127)
巻号頁・発行日: vol.80, no.918, pp.84-91, 1972-02-01
被引用文献数: 12 11

In view of good properties of hollow glass micro-sphere such as lightness, thermal insulating and sound arresting properties, high melting point and incombustibility and ability to increase quantity, some new composites of unparalleled characteristics are being developed by mixing them into plastics, carbon, cement, lime and its kind and metals. For instance they are now being used in diverse fields for making synthetic wood, master model, electric accessories, materials of low thermal conductivity ceramics, including aircraft materials and submarine diver-ship materials, and their demand is rapidly increasing. So, some methods to produce them have been invented already, but as the processes of them are rather complicated and the materials are expensive, the production become very expensive, too. Hereon, we authors discovered that hollow glass micro-sphere can be produced from the "Shirasu", which is acidic volcanic ejecta and one of the unutilized mineral resources distributes widely in southern Kyushu and other districts in Japan, through simple and inexpensive method. Incidentally, we will call it as "Silas Balloons". We made up an apparatus for calcining of raw material, and investigated the conditions for production of Silas Balloons, bubbling and expansive mineral component in Shirasu, the effectiveness of processing of raw material and producibility of Silas Balloons from some Shirasu produced in various districts, and measured general characteristics of Silas Balloons. And following results have been obtained. 1) Using the Shirasu as the material, it is optimum to calcine it at a temperature about 1000℃ shortly within 60 seconds. 2) Maximum size of calcining material is 300μ to obtain hollow glass microsphere. 3) It has been found that bubbling and expansive mineral component in the Shirasu is volcanic glass, and more accurately, the effective H_2O contained in it is estimated the bubbling agent. 4) Enriching the volcanic glass in the material through processing of raw material, especially through classification and magnetic separation, yield of Silas Balloons has considerably increased. 5) Some Shirasu produced in various districts would be able to be used as materials of Silas Balloons. 6) Compared with the known micro-sphere heretofore such as Microballoons of Emerson and Cuming Inc., Silas Balloons is superior to the former in its strength, melting point and hygroscopic property, though inferior to the former in its appearance.

2011-09-02 02:45:08
1 + 1 Twitter

1 0 0 0 OA 日本セメント株式会社八十年史

著者: 橋本謙一
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:18842127)
巻号頁・発行日: vol.73, no.837, 1965-05-01

2011-06-28 02:23:08
1 はてなブックマーク

https://ci.nii.ac.jp/naid/110002314551

1 0 0 0 OA 水地満穂著, 日本の陶磁器, ポプラ社, 昭和34年6月20日発行, \300 / 石川県青壮年瓦研究会研究会報, B5判, 1779ページ, 謄写印刷, 頒価300円

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:18842127)
巻号頁・発行日: vol.67, no.766, 1959-10-01

2011-06-20 10:30:09
1 + 1 Twitter

https://ci.nii.ac.jp/naid/110002318662

1 0 0 0 OA 構造用セラミックスの強度に及ぼす欠陥寸法と切欠き半径の影響

著者: 高橋一郎宇佐美三郎中門公明宮田寛志田茂
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:18842127)
巻号頁・発行日: vol.93, no.1076, pp.186-194, 1985-04-01
被引用文献数: 26 18

各種の微小欠陥を付加したSi3N4とSiCの強度試験を行うとともに, 他の実験結果も併せて整理し, 欠陥寸法, 切欠き半径と強度の関係を求めた. その結果, 実際の機械部品で対象とするような100μm程度以下の微小な欠陥では, 破壊靱性値KICを一定とする線形破壊力学による評価結果は非安全側を与え, この傾向は結晶粒径の大きい材料ほど大であることが明らかとなった. 表面加工傷, 空孔, 人工欠陥等の各種の欠陥についての実験結果は, その形状効果を補正した等価き裂長さを用いることによって, 欠陥寸法と強度の関係は同一に取り扱うことができた. また, 各種セラミックスについての強度試験結果を, 等価き裂長さと平均結晶粒径の比ae/dと小さいき裂と大きいき裂の臨界応力拡大係数の比KC/KICの関係で整理すると, 材料の種類によらずほぼ同一の関係となることが明らかになった. この関係は本報で提案した結晶破壊モデルから導かれる関係式で比較的よく説明され, 更に平滑材における結晶粒径と強度の関係及び切欠き半径と強度の関係についても, 本モデルによる関係式で実験値の傾向は良く表された.

2011-06-17 05:45:09
1 + 0 Twitter

1 0 0 0 OA マグネシア不定形耐火物の充填性

著者: 河村淳一速水久治有吉騏三郎細井映司
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:18842127)
巻号頁・発行日: vol.81, no.935, pp.263-270, 1973-07-01

Packing behavior of the dry ramming mixes by method with stick penetration were in good agreement with calculations of author's previous report. Also, attempts at removal tendency of intermediate component were not so effective for obtaining a closer packing. It was shown that the q value of closest packing (=qρm) might shift to a lower value when the stick penetration times becames larger, and the qρm could be expressed as hyperbolic function of stick penetration times. Another intensified packing experiment of the dry mixes was shown that the qρm was inversely proportioned to the maximum particle-size, and that a closer packing was obtained as the particle were more spherical in shape. In packing experiment of the wet ramming mixes, the behavior by light ramming was similar to that of dry mixes, however, the packing intensity dependence and the maximum particle-size dependence on the qρm was not so much as that of dry mixes, and the shift of the qρm was lower than that of dry mixes. A different tendency about packing behavior by heavy ramming and press moulding of wet mixes was observed, that the qρm might shift to a higher value as the intensity of packing operation got higher, probably as a result of the crushing and defacement of grains. From these results, it might be concluded that the factors of the degree of packing for magnesia ramming mixes was moisture and binder, particle-shape, mechanical properties of magnesia clinker grain, maximum particle-size or extension of distribution, grading of particle-size, and intensity of packing operation.