カルシウムフェライトモノクロライド水和物熱処理中間体のキャラクタリゼーション Characterization of Intermediates Formed by Heat Treatment of Calcium Ferrite Mono-Chloride Hydrates
To determine chemical composition and formation of a new calcium ferrite oxychloride which called A pattern found in the previous work, the characterization of calcium ferrite monochloride hydrates obtained at various compounding ratios (6.0/2.0-4.0/2.0) of CaO/FeCl<SUB>3</SUB> and their heat-treated products were carried out by means of various instruments of XRD, FT-IR, TEM and SEM-EDX. Hydrates as starting materials before heat-treating are identified with a mixture of calcium ferrite monochloride hydrate and amorphous iron oxyhydroxide hydrate with partial carbonation by XRD and FT-IR studies. By electron microdiffraction study on the products heated at 600°C and 700°C, respectively, authors find new two orthogonal reciprocal patterns : B and C except A pattern. By supposing these B and C pattern to be orhorhombic symmetry lattice, principal diffraction lines of XRD pattern of heat-treating products are indexed reasonablly as orthorhombic lattice [B pattern : <I>a</I>=1.015 nm, <I>b</I>=1.781 nm and <I>c</I>=0.440nm] and orthorhombic lattice [C pattern : <I>a</I>= 0.740 nm, <I>b</I>=1.704 nm and <I>c</I>=0.510 nm], respectively. Probable chemical compositions of B and C pattern are estimated to be Ca<SUB>1.6</SUB>Fe<SUB>2.0</SUB>Cl<SUB>0.8</SUB>O<SUB>4.2</SUB> and Ca<SUB>1.9</SUB>Fe<SUB>2.0</SUB>Cl<SUB>0.4</SUB>O<SUB>4.7</SUB>, respectively by EDX microanalysis.
- 無機マテリアル : セッコウ・石灰・セメント・地球環境の科学 = Inorganic materials
無機マテリアル : セッコウ・石灰・セメント・地球環境の科学 = Inorganic materials 5(275), 296-305, 1998-07
The Society of Inorganic Materials, Japan