Patent
Doped BaTiO3 based compositions
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TLDR
In this paper, a variety of dispersible doped multi-component BaTiO 3 based powder compositions are described, where the primary particles of each of the products are substantially spherical, have sizes in the range of 0.05 to 0.4 microns and have narrow size distributions.Abstract:
The present invention relates to a variety of dispersible doped multi-component BaTiO 3 based powder compositions. The primary particles of each of the products are substantially spherical, have sizes in the range of 0.05 to 0.4 microns and have narrow size distributions. Further, the compositions of the primary particles, forming each powder, are comparable. The amount of dopant oxide or oxides contained in the powder composition ranges from between greater than 1 to 10 mole percent. Regardless of the dopant or dopants utilzied, all the powder compositions of the present invention are identified by the same unique morphological characteristics.read more
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References
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Synthesis and processing of monosized oxide powders
TL;DR: In this article, a method for doping spherical oxide powders and forming sinterable compacts is presented. But the method is not suitable for the case of high purity spherical powders.
Journal ArticleDOI
Preparation of Semiconducting Titanates by Chemical Methods
TL;DR: In this paper, the effect of excess titanium on the electrical properties was also determined and an excess of 1 to 2 mole % was found to raise the positive temperature coefficient under the firing conditions employed.
Patent
Process for producing a composition which includes perovskite compounds
TL;DR: A process for producing a composition which includes a perovskite compound, the process comprising: (a) filtering, washing with water and drying the resultant reaction mixture to provide a solid reaction product, dispersing the reaction product in an aqueous medium to form a slurry, adding to the slurry a water-soluble compound of the A group element, and then adding to this slurry an insolubilizing agent to insolubili- ing the water solubilize the watersoluble compounds of the a group element so as to adjust the ratio
Journal ArticleDOI
Effect of pH on the Chemical Preparation of Barium‐Strontium Titanate
TL;DR: In this paper, a hydrated, mixed hydroxyoxalate formulation of the titanates was proposed. Butler et al. measured the resistivity and density of titanates as a function of the lanthanum content.
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Titanate powder and process for producing the same
TL;DR: A powder consisting of barium titanate powder, strontium titanates powder or a solid solution thereof, characterized in that (a) its average particle diameter is 0.07 to 0.5μ, (b) its specific surface area measured is 20 m2 /g or less and does not exceed 2.5 times the surface area calculated from the average component diameter on the assumption that the powder particles are spherical.