Journal of the Society of Inorganic Materials, Japan
Online ISSN : 2185-4378
ISSN-L : 1345-3769
12 巻 , 316 号
選択された号の論文の6件中1~6を表示しています
  • 坂井 悦郎, 大宅 淳一, 高橋 茂, 大門 正機
    2005 年 12 巻 316 号 p. 179-183
    発行日: 2005/05/01
    公開日: 2011/03/07
    ジャーナル フリー
    This paper discusses the hydration products in C3A-CaSO4.2H2O-CaCra4system. The mole ratio of gypsum to C3A is 2/3 and the replacement mole ratio of CaCrO4 to gypsum is ranged from 0 to 1.0. CrO42- is fixed to AFm phase and the basal space of AFm is not changed until the replacement ratio of CaCrO4 is 0.25. But, the basal space of AFm is increased and the XRD peak of AFm become broad with increasing of the replacement ratio of CaCrO4. In CrO42--AFm, the basal space changed from 0.98 into 1.02 nm depending on a synthetic condition and the drying conditions, and the water between layers in AFm in that case was presumed to be 12 and 14 moles.
  • 吉田 昌弘, 徳留 政隆, 池島 靖浩, 上村 芳三, 幡手 泰雄, 皿田 二充, 甲原 好浩
    2005 年 12 巻 316 号 p. 184-190
    発行日: 2005/05/01
    公開日: 2011/03/07
    ジャーナル フリー
    Lead-free glasses with a low melting point and good chemical durability are desirable for the sealing process in the ceramic and electronic fields. In this study, B2O3, ZnO, BaO, and TeO2 or Bi2O3 were used to prepare lead-free sealing glasses with a low melting temperature. The glass forming region, glass transition temperature, softening temperature, thermal stability, thermal expansion property, and X-ray properties were investigated in detail in the ternary (B2O3-ZnO-BaO) and quaternary (B2O3-ZnO-BaO-TeO2 or Bi2O3) systems. The dependencies of these properties on composition were quantitatively characterized. The ternary system glass (30 mass% B2O3-20 mass % ZnO-50 mass% BaO) had a low melting property, a high chemical stability (ΔT : 110°C), and an amorphous structure. Furthermore, the quaternary lead-free glass (10 mass% B2O3-6.7 mass% ZnO-16.7 mass% BaO-66.6 mass% TeO2 or Bi2O3) showed even higher thermal stability (Δ T : more than 200°C) and good bonding and sealing properties. The quaternary glass also had a high water resistance compared to commercial lead glass. In a sealing test with a plane fluorescence lamp incorporated in a digital camera, perfect sealing was achieved. The prepared lead-free glass showed an excellent performance as a substitute for the commercial lead glass.
  • 三国 彰, 魏 存弟, 小松 隆一, 池田 攻
    2005 年 12 巻 316 号 p. 191-199
    発行日: 2005/05/01
    公開日: 2011/03/07
    ジャーナル フリー
    パイロフィライト粘土鉱石からのSi4+イオンAl3+イオンの溶出特性についてパイロフィライトの加熱変化に関連づけて研究した.A (80.2mass%) およびB (35.7mass%) の2種類のパイロフィライト鉱石を用いて検討した.溶出試験は原料およびか焼したパイロフィライトを25℃および80℃の0.1N苛性ソーダ溶液中で溶出させることにより行なった.パイロフィライトを主成分とするパイロフィライト粘土鉱石Aは80℃溶出試験では原料も高い溶出を示した.一方, カオリンや石英を含有するパイロフィライト鉱石Bは80℃における原料の溶出量は粘土鉱石Aと比較して少なかった.しかしながら中間の温度範囲でか焼するとカオリンの分解により高い溶出性を示した.パイロフィライトを多く含有するパイロフィライト粘土鉱石はジオポリマー固化体の製造における活性フィラーとしてか焼せずに使用できることが明らかとなった.
  • 高橋 泰弘, 堀 雅宏
    2005 年 12 巻 316 号 p. 200-206
    発行日: 2005/05/01
    公開日: 2011/03/07
    ジャーナル フリー
    In order to increase amount of recovery of phosphorus furthermore in sewage, the methods of sludge treatment using polyaluminum chloride (PAC) which has an effect of phosphorus removal were investigated. The experiments recovering phosphorus from the incinerated ash of the sludge and aluminum of the flocculant added to remove phosphorus were carried out. When PAC was added 1.5 times mole as Al for PO4-P into the sludge, 56% of PO4-P was removed and the amount of elution of phosphorus and aluminum were increased by 50% and 40% respectively. When PAC was added 3.0 times mole, 95% of PO4-P was removed and the amount of elution of phosphorus and aluminum were increased by 80% and 80% respectively. It was found that more amount than the aluminum added to remove phosphorus could be recovered from incinerator ash.
  • 太田 有美, 永沢 基, 下川路 友博, 加藤 中英, 桑原 勝美
    2005 年 12 巻 316 号 p. 207-212
    発行日: 2005/05/01
    公開日: 2011/03/07
    ジャーナル フリー
    Calcium carbonate deposited on titanium substrate by electrochemical method has been investigated from view point of modification and shape. Electrolytic solution of calcium dihydrogencarbonate was prepared by bubbling carbon dioxide into calcium carbonate suspension. Calcium carbonate was deposited on the substrate electrode in the electrolytic solution of pH1.99-8.29. Main product obtained at lower pH region was calcite of rhombohedral shape and that obtained at higher pH region was vaterite of spherical aggregate of plate-like crystal. The larger the current density and the longer the electrolysis time were, the larger the deposition rate of vaterite became. The tendency was estimated to be related to the hydroxyl ion concentration on the substrate electrode surface.
  • 伊熊 泰郎
    2005 年 12 巻 316 号 p. 213-220
    発行日: 2005/05/01
    公開日: 2011/03/07
    ジャーナル フリー
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