Influence of Reactant Materials on the Formation of ZnAl_2O_4

スポンサーリンク

概要

• 論文の詳細を見る

• The influence of the reactant materials (Al_2O_3(A), η-Al_2O_3,α-Al_2O_3) on the formation of ZnAl_2O_4 was studied by means of powder X-ray diffraction analysis and optical microscope. The results are follow : 1. The result of the present experiment is considered to be free from the effect of the difference in the size and shape of Al_2O_3 and ZnO used as reactants for the reaction of ZnAl_2O_4 formation, since these substance are confirmed to be similar in shape (globular) and nearly the same in average particle diameter (1.8 to 1.5μm). 2. The rate of reaction was measured using various forms of Al_2O_3 as a reactant at the temperature ranging from 800 to 1200℃. The rate was found to follow the Jander's equation from which the rate constant and the activation energy were calculated. 3. The reactivity as expressed by the rate constant followed the order of Al_2O_3 (A)>η-Al_2O_3>α-Al_2O_3 and the activation energy obtained was 37,40 and 73 kcal/mol for Al_2O_3(A), η-Al_2O_3 and α-Al_2O_3,respectively. 4. Crystallographic properties were in accord with the above series.

• 東海大学の論文
• 1987-03-01

著者

• Fujita Kazumi

  Department Of Chemistry Faculty Of Science Tokai University

• Kayama I

  Department Of Chemistry Faculty Of Science Tokai University

• Kayama Isao

  Department Of Chemistry Faculty Of Science Tokai University

関連論文

• Photocatalytic activity of nanocrystalline TiO_2(B) synthesized from titanium glycolate complex by hydrothermal method(Aqueous Solution Science for Ceramic Processing II)
• Preparation and Characterization of (Amino carboxamidato-N,N')(chloro)(dimethyl sulfoxide-S)-platinum(II)Complexes
• Particle Size Distributions of CoFe_2O_4 prepared by the Coprecipitation Method and the Ignited Specimen
• Effects of Various Ions on the Synthesis of Barium Apatite obtained by Homogeneous Precipitation Method
• Crystallization in Basic Aqueous Solution of Alumina Hydrate Gels by the Homogeneous Precipitation Method
• Synthesis of PbI_2 in Metasilicate Gel
• Influence of Aluminum Sulfate Concentration and Urea Content upon Particle Diameter of Alumina Hydrate Gel Synthesized by Homogeneous Precipitation Method
• Synthesis of Alumina Hydrate Gel from Alum by the Homogeneous Precipitation Method and Its structural Change by Heating
• Influence of Reactant Materials on the Formation of ZnAl_2O_4
• The control of the particles of magnetite.

スポンサーリンク