| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a vanadate-based multiple oxide represented by general formula RVO<SB POS="POST">4</SB>or RVO<SB POS="POST">3</SB>, in which a process of removing an unreacted material and impurities is not required, a corrosive by-product is not produced, a specific solvent is not used, agitation is also not required, and an inexpensive autoclave can be used, and by which a crystallized material is obtained without heat treatment or a heat treatment process at high temperature. <P>SOLUTION: The method for producing the vanadate-based multiple oxide represented by general formula RVO<SB POS="POST">4</SB>is characterized in that a crystallized material of the vanadate-based multiple oxide can be directly obtained by including: a process of preparing a precursor of the vanadate-based multiple oxide by wet-mixing and pulverizing a raw material containing, for example, at least one of an oxide, a hydroxide or an oxyhydroxide of an element occupying R-site and at least one of an oxide, a hydroxide or an oxyhydroxide of vanadium in a nonalcoholic aqueous solvent containing water in a molar amount of 0.25-1.0 time of the stoichiometric molar quantity required for forming an RV(OH)<SB POS="POST">8</SB>multiple hydroxide and an organic solvent having compatibility with water other than alcohols; and a process of subjecting the obtained aqueous solvent slurry to a solvothermal treatment. <P>COPYRIGHT: (C)2012,JPO&INPIT |
