| 摘要 |
PURPOSE:To enable the production of a novel fibrous compd. useful as a cation conducting body, ion exchanger, catalyst, heat resistant material, reinforcing material, etc., by forming a fibrous compd. having an orthorhombic tunnel structure expressed by the title general formula. CONSTITUTION:The fibrous compd. of this invention is expressed by the general formula I and has a orthorhombic tunnel structure. In the formula I, A is Na, K, Rb, Cs; M is Ga, Al, Fe, Cr; (x) is 0-0.5. The raw materials for producing the crystal of this compd. are A2O, TiO2, M2O3 or compds. forming each component by thermal decomposition, and are mixed in proportions expressed by the formula II [wherein each (a)-(c) is 0.1-2.0], or products obtained by the solid phase reactions of each component. On one hand, raw materials for flux are obtd. by mixing MoO3, A2O, or compds. decomposed thermally to each component in a proportion expressed by the formula III [wherein (d) is 0.5-2.0]. A mixture of the raw materials for the crystal with the raw materials for the flux is melted by heating at 1,200-1,400 deg.C, and the molten body is cooled slowly to 900-1,000 deg.C to grow to a fibrous single crystal.
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