Abstract
An X‐ray and dielectric study of three series of PbNb2O6‐type solid solutions was carried out. The PbNbZOs‐type phase was present up to the following limits: (1) (Pb1−xBi4/3x)(TixNb2‐x.)O6, ×= 0.2; (2) (Pbl‐xBi43x)(Ti2Nbl—2)206, ×= 0.2; and (3) (Pb1−xBi2/3x)Nb2O6×= 0.3. Orthorhombic distortion b/a and Curie temperature decreased with increasing x. Bi4/3‐Ti206 was most effective in this respect and Bi2, 3‐Nb2O6 had the least influence. The important role played by ions of different valency located on crystallographically equivalent sites is pointed out.
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