Mirror substrate of atomically substituted Na Zr.sub.2 PO.sub.12

Details Mirror substrate of atomically substituted Na Zr.sub.2 PO.sub.12 Mirror substrate of atomically substituted Na Zr.sub.2 PO.sub.12

1984-06-01

1986-05-06

McCarthy, Helen M.

Stock material or miscellaneous articles

Composite

Of silicon containing

350641, 350320, 423306, 428472, 428699, 428701, 4289122, 501102, B32B 1800, C01B 2537, G02B 100, G02B 1700

Patent

active

045871728

ABSTRACT:
A low expansion ceramic material has a composition represented by the molecular formula i (Na) j (Zr.sub.2-z Na.sub.4z) k (P.sub.3-x Na.sub.x Si.sub.x)O.sub.12 in which the molar proportions i, j and k are each within the range from about 0.9 to about 1.1, and i+j+k equal 3; and, for molar proportions i, j and k each equal to 1.0, the ceramic composition falls within the area defined by the points A, B, C and D in a quarternary diagram of SiO.sub.2, Na.sub.2 O, P.sub.2 O.sub.5 and ZrO.sub.2, the coordinates of the points being:

REFERENCES:
patent: 4049891 (1977-09-01), Hong et al.
patent: 4166159 (1979-08-01), Pober
patent: 4340646 (1982-07-01), Ohno et al.
patent: 4448855 (1984-05-01), Senaha et al.
patent: 4512905 (1985-04-01), Clearfield et al.
Clearfield, A. et al., "Synthesis of Sodium Dizirconium Triphosphate from .alpha.-Zirconium Phosphate", Mat. Res. Bull., 15, pp. 1603-1610 (1980).
Boilot, J. P. et al., "Phase Transformation in Na.sub.1+x Si.sub.x Zr.sub.2 P.sub.3-x O.sub.12 Compounds", Material Research Bulletin, vol. 14, pp. 1469-1477, 1979.
Hong, H. Y-P., "Crystal Structures and Crystal Chemistry in the System Na.sub.1+x Zr.sub.2 Si.sub.x P.sub.3-x O.sub.12 ", Material Research Bulletin, vol. 11, pp. 173-182, 1976.

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