The invention provides a method for producing barium titanate powder comprising the steps of: adding an aqueous slurry of anatase hydrous titanium oxide having a BET specific surface area in the range of 200 to 400 m.sup.2/g and a half width of diffraction peak of (101) plane in the range of 2.3 to 5.0 as measured by X-ray diffraction to an aqueous solution of barium hydroxide while maintaining the aqueous solution of barium hydroxide at a temperature in the range from 80 C. to the boiling point thereof under normal pressure to cause a reaction of the barium hydroxide with the hydrous titanium oxide to provide an aqueous slurry of barium titanate precursor; and subjecting the barium titanate precursor thus obtained to hydrothermal treatment over a period of time shorter than 24 hours to provide barium titanate particles.

This disclosure provides methods and materials related to boron nitride aerogels. In one aspect, a material comprises an aerogel comprising boron nitride. The boron nitride has an ordered crystalline structure. The ordered crystalline structure may include atomic layers of hexagonal boron nitride lying on top of one another, with atoms contained in a first layer being superimposed on atoms contained in a second layer.

Described is a composite material composed of an atomically thin (single layer) amorphous carbon disposed on top of a substrate (metal, glass, oxides) and methods of growing and differentiating stem cells.

The present document describes an oral care composition comprising treated aragonite calcium carbonate (CaCO.sub.3) particles having more than 95% (w/w) calcium carbonate content, a specific surface area (SSA) of about 2.70 to about 3.1 m.sup.2/g, for use as a first dental abrasive, a fluoride compound suitable to provide beneficial fluoride treatment to teeth; and a suitable carrier. The treated aragonite calcium carbonate particles have been effectively treated in mildly acidic condition to avoid reaction of fluoride from the fluoride compound and the treated aragonite calcium carbonate particles.

The inorganic particle according to the present invention is composed of aggregation of crystalline and amorphous small particles and has a spherical and smooth surface. The spherical appearance, low crystallinity and narrow particle size distribution of inorganic particle are more advantageous in reducing scratch defects in the CMP process. In addition, since the small particles on the surface of the inorganic particle provide more active sites, the inorganic particle has an excellent removal rate, so it is advantageous as a next-generation CMP abrasive.

A catalyst that includes cerium oxide having a fluorite lattice structure is provided. The cerium oxide includes cerium atoms in mixed valence states of Ce.sup.3+/Ce.sup.4+, in which the ratio of Ce.sup.3+/(Ce.sup.3++Ce.sup.4+) in the lattice ranges from 40% to 90% at 20 C. The valence states Ce.sup.3+ and Ce.sup.4+ are reversible in reduction and oxidation reactions, and the cerium oxide maintains catalytic ability at temperatures at least up to 450 C.

Disclosed are a multi-wall carbon nanotube (MWCNT) formed using arc discharge and a method for manufacturing the same. The carbon source of the anode and boron that is the doping source, are evaporated through arc discharge and then deposited on the surface of the cathode to form MWCNTs, and boron is evenly distributed in the multi-walls of the MWCNTs. Therefore, the outer diameter of the MWCNT is reduced, high thermal stability is secured, and the effect of improving the field emission characteristics can be obtained.

Provided is an ultra-high structure and high specific surface area carbon black based on high crystallinity and a preparation method thereof, an electrode slurry, and a battery. The ultra-high structure and high specific surface area carbon black based on high crystallinity satisfies the following characteristics: (1) the degree of crystallinity is equal to or more than 39%; (2) the BET specific surface area ranges from 200 m.sup.2/g to 763 m.sup.2/g; (3) the OAN ranges from 334 mL/100g to 548 mL/100g; and (4) the average particle diameter of primary particles is equal to or less than 35 nm.

A pseudo-boehmite has a ratio of crystalline sizes D.sub.(130) and D.sub.(020) at a ratio of D.sub.(130)/D.sub.(020)=1.0-1.5, preferably, 1.1-1.3. A preparation method of the pseudo-boehmite, a catalytic cracking catalyst containing the pseudo-boehmite, and a preparation method and application of the catalytic cracking catalyst are provided. The pseudo-boehmite is applied to a catalytic cracking catalyst, and can produce a significant mesopore distribution in case that the catalyst strength is qualified, significantly improving the pore structure of the catalyst, which is of great significance for promoting the efficient diffusion of heavy oil macromolecules, reaction intermediates and product molecules in the catalyst, reducing the coke yield, and optimizing the product distribution.

This disclosure relates to methods of preparing a dry gel zeolite including drying the zeolite hydrogel under reduced pressure to form a dry gel zeolite.