Shin Suzuki

Deceleration of ion beams for film deposition by an electrostatic field

Abstract For the practical use of ion beam deposition (IBD), the deceleration characteristics of Ar+ ion beams of the order of mA and of 10 kV were investigated by using an electrostatic field of a flat deposition electrode. The experiments were carried out by means of measurement of the electrode currents of a deceleration unit settled in an electromagnetic isotope separator and by photographic observation of the ion beams. A preliminary Si deposition was attempted and a metallic film appearance was obtained on an Al2O3 substrate.

RADIOACTIVE CONTAMINATION OF METALLIC COPPER SURFACES WITH NON-CORROSIVE FISSION-PRODUCT SOLUTIONS

Contamination of radioactive nuclides on metallic copper surface was studied using oxygen-free sulfuric acid solution containing fission products. Experiments for the influences of various factors such as acidity of the solutions, co-existence of heavy metal ions, and cation surfaceactive agents, and various treatments of copper surface were carried out. The radioactive contamination of metallic copper surface in non-corrosive solution was generally less than that in corrosive solution, and copper surface was contaminated selectively by some radioactive nuclides. The radioactive contamination of copper surface was extremely decreased by addition of heavy metal ions (Fe/sup 3+/ , Cr/sup 3+/) or cation surface-active agent into the solutions, and was also influenced by the condition of copper metal surface. (auth)

DETERMINATION OF OXYGEN IN CAST IRON

Synopsis: Recently, the determination of oxygen in cast iron has been required and it is important to determine not only the total oxygen but the oxygen as each oxide. The non-metallic inclusion method such as the chlorine method, the electrolytic method, the hot nitric acid method etc . is the usual method for determining each oxide in cast iron but this method is tedious and not reliable. The authors studied on the fractional vacuum-fusion method and it was found that by using a tin-bath, FeO could be extracted at 1050°C, MnO at 1150°C, SiO2 at 1450°C and Al2O3 at 1750°C by this simple method. The same cast iron samples were analyzed bv the fractional vacuum-fusion method, the hot nitric acid method, the chlorine method and the electrolytic method. Successful results were obtained by the fractional vacuuni-fusion method in comnarison with the case of the non-metallic inclusion method.

Catalytic Analysis. XVIII

1) Fe...とS2O3″の間の反應に於けるCu..の接觸作用を利用して銅の微量定量を行つた.2) Fe...とS2O3″より最初生成するFe(S2O3)2′の濃菫色の脱色の程度をプルフリッヒの光度計を使用して測定することにより一定量の鐵が還元さるる迄の時間を測定して反應の速さを知り,其時間の逆數と銅量とは直線關係にある事を示し,之により時間を測定することよりグラフにより銅量が定量し得られる.又直線を示す式の常數を定めおくことにより式を利用して計算により定量し得た.3) 温度の影響及び他の金屬イオンの影響を實驗した.温度の上昇により速度は早くなり多量の銅の定量は困難となる.他金屬イオンとして鉛,亞鉛及びナトリウムの存在にて實驗しあまり影響なく同様に定量し得られることを示した.