種々のNASICON型リン酸ジルコニウムの合成

概要

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The proton-type crystalline zirconium phosphate, HZr_2(PO_4)_3, was prepared by a thermal decomposition of NH_4Zr_2(PO_4)_3 at about 680℃, where NH_4Zr_2(PO_4)_3 was obtained in advance by a hydrothermal synthesis using a mixed solution of ZrOCl_2, H_3PO_4.and H_2C_2O_4. This zirconium phosphate was, then, mixed with other metal nitrate, M(NO_3)_n(M=Li,Na,K,Rb,Sr,Bi,Y,Mg,Ca,Sc,Mn,Fe,Co,Ni,Cu,Zn,Ag,Cd,Cs,Ba,La,Ce,Tl or Pb;n=1,2or3), at room temperature. The TG-DTA curves of these mixtures showed an endothermic weight loss around melting or decomposition temperature of each metal nitrate as a component. From these results, calcination temperature, which is in the range of 500-800℃ and 100-200℃ higher than the endothermic peak temperature, was determined for each mixture, in order to eliminate the unreacted components. All products thus calcined gave the XRD patterns attributable to M{Zr_2(PO_4)_3}_n(n=1forM(I),n=2forM(II)and n=3forM(III)) with a NASICON-type structure.
社団法人日本セラミックス協会の論文
2001-04-01