Titanate powder and process for producing the same

Details Titanate powder and process for producing the same Titanate powder and process for producing the same

1988-02-09

1990-02-06

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

501137, 423593, 423598, C04B 3546

Patent

active

048988430

ABSTRACT:
A powder consisting of barium titanate powder, strontium titanate powder or a solid solution thereof, characterized in that (a) its average particle diameter is 0.07 to 0.5.mu., (b) its specific surface area measured is 20 m.sup.2 /g or less and does not exceed 2.5 times the specific surface area calculated from the average particle diameter on the assumption that the powder particles are spherical, (c) its crystallite diameter calculated from the half-width of the peak of the X-ray diffraction pattern for the powder is 0.05.mu. or more, and (d) its shape is substantially spherical. Said powder can be produced by reacting hydrous titanium oxide with barium hydroxide and/or strontium hydroxide at a temperature ranging from 60.degree. C. to less than 110.degree. C. in the presence of 120 to 2,000 moles of water per mole of titanium.

REFERENCES:
patent: 3647364 (1972-03-01), Mazdiyasni et al.
patent: 4293534 (1981-10-01), Arendt
patent: 4487755 (1984-12-01), Arendt
patent: 4520004 (1985-05-01), Uedaira et al.
patent: 4534956 (1985-08-01), Arendt et al.
patent: 4543341 (1985-09-01), Barringer et al.
Barringer, E. A. et al., "Formation Packing and Sintering of Monodisperse TiO.sub.2 Powders", J. Am. Cer. Soc. 65(12), Dec. 1982, C199-C201.
Smith, J. S. et al., "Preparation and Characteristics of Alkoxy-Derived SrZrO.sub.3 and SrTiO.sub.3 " J. Am. Cer. Soc. 53 (1970) pp. 91-95.
Kubo, Teruichiro et al., Kogyo Kagaku Zasshi 71(1) 1968) pp. 114-118.
Gallagher, P. K. et al., "Preparation of Semiconducting Titanates by Chemical Methods" J. Am. Cer. Soc. 46 (1963) pp. 359-365.
Mazdiyasni, K. S. et al., "Preparation of High Purity Submicron Barium Titanate Powders" J. Am. Cer. Soc. 52 (1968) pp. 523-526.
Matsuoka, K. et al., "Hydrothermal Synthesis of BaTiO.sub.3 " Report of Research Laboratory of Hydrothermal Chemistry, Kochi Univ, vol. 2(15) pp. 45-47.

Affiliated with

Also associated with

Rating

Titanate powder and process for producing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Titanate powder and process for producing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Titanate powder and process for producing the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-441839