Compositions: ceramic – Ceramic compositions – Refractory
Patent
1986-09-26
1988-05-24
Dixon, Jr., William R.
Compositions: ceramic
Ceramic compositions
Refractory
501153, 423613, C04B 3510, C01G 2307
Patent
active
047466383
ABSTRACT:
Alumina-titania composite powder comprising spherical particles each of which contains about 30 to 80 wt % of .gamma.- phase or .delta.-phase alumina and about 70 to 20 wt % of titania comprising rutile-phase in the majority and is substantially free from X-phase (3Al.sub.2 O.sub.3 -TiO.sub.2) and aluminum titanate-phase. These alumina-titania composite powders are prepared by blowing a vapor mixture of AlCl.sub.3 and TiCl.sub.4 into a burning flame to effect oxidation, which is characterized in that a temperature of a mixing section, where a combustible gas, an oxidizing gas, AlCl.sub.3 gas, TiCl.sub.4 gas and a carrier gas are mixed and subjected to combustion, is kept at about 1450.degree. C. or higher and lower than a melting point of aluminum titanate; a temperature of an outlet portion of a reacting section connected to the mixing section is kept at about 800.degree. C. or higher; and an average total gas retention time in the mixing section and the reacting section are 20 to 500 msec.
REFERENCES:
patent: 3361525 (1962-10-01), DeRyeke et al.
patent: 3403001 (1963-07-01), Mas et al.
patent: 3486913 (1969-12-01), Zirngibl et al.
patent: 3505091 (1970-04-01), Santes
patent: 3734761 (1971-01-01), Becker et al.
patent: 4053577 (1977-10-01), Arkless
patent: 4491482 (1985-01-01), Hori
patent: 4532224 (1985-07-01), Hori
patent: 4591471 (1986-05-01), Hori
Gani et al., "The Structure of Plasma-Prepared Al.sub.2 O.sub.3 -TiO.sub.2 Powders", Journal of Material Science, vol. 15, pp. 1915-1925, (1980).
Slepetys et al., "Solid Solution of Aluminum Oxide in Rutile Titanium Dioxide", The Journal of Physical Chemistry, vol. 73, No. 7., pp. 2157-2163, (Jul. 1969).
Hori Saburo
Ishii Yoshio
Dixon Jr. William R.
Hunter, Jr. James M.
Kureha Chemical Industry Co. Ltd.
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