Barium-containing alumina

Details Barium-containing alumina Barium-containing alumina

1992-12-22

1995-02-14

Green, Anthony

Compositions: ceramic

Ceramic compositions

Refractory

501153, 423625, 2523157, C04B 3510

Patent

active

053895894

ABSTRACT:
The present invention is a barium-containing alumina with the X-ray pattern of the FIGURE. The alumina may be synthesized by simultaneously adding a polyether or a polyalcohol and an aqueous solution of a water soluble barium carboxylate to an aqueous boehmite sol or suspension to form a gel, the gel having a polyether or polyalcohol content of about 2 wt. % to about 26 wt. %, preferably about 10 wt. % to about 20 wt. %. The gel is then dried and calcined to convert it to an essentially pure barium-containing delta alumina. The alumina may be optionally hydrothermally treated to induce further crystallization. The final product contains about 2 wt. % to about 18 wt. % Ba, preferably about 8 wt. % to about 12 wt. %.

REFERENCES:
patent: 4031177 (1977-06-01), Auriol et al.
patent: 4332913 (1982-06-01), Bock
patent: 4495302 (1985-01-01), Taylor et al.
patent: 4582813 (1986-04-01), Kanda et al.
Azaroff et al, The Powder Method in X-Ray Crystallography, pp. 10-11, 1958 (no month).
Cullity, Elements of Materials Science and Engineering, pp. 397-406, 1978, (no month).
Van Vlack, Elements of Materials Science and Engineering, pp. 95-98, Jun. 1980.
Mizukami et al., CAPoC2 Proc. Second Int'l Sympos, 557-568 (1991) (no month).
Repelin et al., Mat. Res. Bull., 25, 611-621 (1990) (no month).
Machida et al. Chem. Lett., Chem. Soc. Jap., 151-154 (1986) no month.
Machida et al., Chem. Lett., Chem. Soc. Jap., 767-770 (1987) no month.
Machida et al., Bull. Chem. Soc. Jpn., 61, 3659-3665 (1988) no month.

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