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Formation of Solid Solutions of New Tungsten Bronze-Type Microwave Dielectric Compounds Ba 6-3x R 8+2x Ti 18 O 54 (R=Nd and Sm, 0≤x≤1)

Ohsato, Hitoshi ; Ohhashi, Toshiyuki ; Nishigaki, Susumu ; [et al.]

IOP Publishing ; 1993

In: Japanese Journal of Applied Physics Vol. 32, No. 9S ( 1993-09-01), p. 4323-

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In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 32, No. 9S ( 1993-09-01), p. 4323-

Abstract: The formation of solid solutions of microwave dielectric compounds having compositions in the vicinity of Ba 3.75 - R 9.5 Ti 18 O 54 and/or BaO· R 2 O 3 ·4TiO 2 ( R =rare earth) has been investigated. 3BaO·2 R 2 O 3 ·9TiO 2 (Ba 6 R 8 Ti 18 O 54 ) solid solutions with the ideal formulae of Ba 6-3 x R 8+2 x Ti 18 O 54 (0.0≤ x ≤1.0) have been derived on the tie line with the ratio Ti:O=1:3 between perovskite and R 2 Ti 3 O 9 based on the new tungsten bronze-type crystal structure with 2×2 perovskitelike unit cells. The type of solid solutions is substitutional with following the relation 3Ba 2+ \rightleftarrows2 R 3+ +\Box. Lattice parameters as a function of composition have been determined by the WPPD (whole-powder-pattern decomposition) method. 17) The formation range is located at 0.3≤ x ≤0.7 compositions in the case of R =Sm and 0.0≤ x ≤0.7 in R =Nd. In the latter case, two kinds of substitutions of the solid solutions are considered.

Type of Medium: Online Resource

ISSN: 0021-4922 , 1347-4065

URL: Article

DOI: 10.1143/JJAP.32.4323

RVK:

UA 4210.1

RVK:

UA 4210.2

RVK:

UA 4210

Language: Unknown

Publisher: IOP Publishing