| 摘要 |
<p>A process for the preparation of a niobium compound of formula (I): DαNbβEγO3-δ (I) wherein D is an alkali metal (e.g. Li, Na, K, Rb, Cs and/or Fr), alkaline earth metal (such as Ba, Ca, Mg and/or Sr), La and/or Bi and may be present as a mixture of two or more metals; E is Ta, Sb and/or Fe and may be present as a mixture of two or more metals;αis a positive numberβis a positive numberγis zero or a positive numberδis a number 0≰δ≰0.5; and wherein the formula (I) has the perovskite or tungsten bronze structure; comprising spray pyrolising a solution, for example an aqueous solution, comprising metal (D) ions, Nb ions and if present, metal (E) ions.</p> |
