A sintering powder comprising: a particulate having a mean longest diameter of less than 10 microns, wherein at least some of the particles forming the particulate comprise a metal at least partially coated with a capping agent. A sintering paste and sintering film comprising the sintering powder. A method for making a sintered joint by sintering the sintering powder, paste, or film in the vicinity of two or more workpieces.

An active cathode material for a lithium-ion cell includes a mixture of particles having particle sizes distributed according to a bimodal particle size distribution which has a first modal value and a second modal value, where the first modal value is greater than the second modal value. The mixture of particles comprises first particles and second particles that intercalate lithium or are configured to intercalate lithium. The first particles have a particle size which is greater than a predefined first particle size range limit. The second particles have a particle size which is less than a predefined second particle size range limit. The second predefined particle size range limit is less than the predefined first particle size range limit. A particle size distribution of each of the first particles and the second particles is unimodal. The second particles have a mechanical strength higher than that of the first particles.

A positive electrode for a rechargeable lithium battery includes a positive active material including small particle diameter monolith particles having a particle diameter of about 1 μm to about 8 μm and including a first nickel-based lithium metal oxide, and large particle diameter secondary particles having a particle diameter of about 10 μm to about 20 μm and including a second nickel-based lithium metal oxide. An X-ray diffraction peak intensity ratio (I(003)/I(104)) of the positive electrode is greater than or equal to about 3. A rechargeable lithium battery includes the positive electrode.

A positive electrode active material precursor, a method of preparing the same, a positive electrode for a secondary battery and a lithium secondary battery which include the same are disclosed herein. In some embodiments, a method of preparing a positive electrode active material precursor includes adding a transition metal aqueous solution, an ammonium ion-containing solution, and a basic aqueous solution to an initial reaction solution, and performing a co-precipitation reaction to prepare a positive electrode active material precursor having an average particle diameter (D.sub.50) of 3 μm to 5 μm, wherein the transition metal aqueous solution including a nickel raw material, a cobalt raw material, and a manganese raw material, and wherein the initial reaction solution includes a metal additive, wherein the metal additive includes at least one element selected from the group consisting of Group 5 elements and Group 6 elements.

An hBN powder containing an aggregate of primary particles of hBN, the hBN powder having a ratio of an average longer diameter (L.sub.1) to an average thickness (d.sub.1) of the primary particles, [L.sub.1/d.sub.1], of 10 to 25, a tap density of 0.80 g/cm.sup.3 or more, and a BET specific surface area of less than 5.0 m.sup.2/g, in which a particle size distribution curve showing a frequency distribution based on volume of the hBN powder is a bimodal distribution curve having a first peak and a second peak in a range of a particle size of 500 μm or less and having a peak height ratio of a second peak height (H.sub.B) to a first peak height (H.sub.A), [(H.sub.B)/(H.sub.A)], of 0.90 or less, a method for producing the same, and a resin composition and a resin sheet each comprising the hBN powder.

The present invention concerns a powdery slaked lime composition having an Alpine fluidity greater than 50% and including a first fraction of particles having a size less than 32 μm and a second fraction of particles with the size greater than 32 μm, the second fraction being less than 10% by weight, compared to the total weight of the composition. The invention also relates to a method for producing same.

A method for obtaining bimodal mesoporous materials based on silicon oxides by using microwave radiation. A method for obtaining bimodal mesoporous materials, based on silicon oxides, from atranic precursors, characterized in that it comprises: —a first step of forming a mesostructured material containing organic matter, —and a second step of eliminating the organic matter contained in the mesostructured material, by calcination, obtaining a bimodal mesoporous material based on silicon oxide, such that at least one of the two steps is carried out by irradiation of the corresponding starting material, with microwave radiation from solid state sources.

A method for preparing a bimodal-type positive electrode active material precursor is provided. The method is capable of not only increasing productivity by preparing positive electrode active material precursors having small diameters and large diameters in a single reactor but also improving packing density per unit volume, a positive electrode active material precursor prepared by the preparation method and having improved packing density, and a positive electrode for a secondary battery and a lithium secondary battery including the same.

The present invention provides that powder is mainly constituted from secondary particles of hydroxyapatite. The secondary particles are obtained by drying a slurry containing primary particles of hydroxyapatite and aggregates thereof and granulating the primary particles and the aggregates. A bulk density of the powder is 0.65 g/mL or more and a specific surface area of the secondary particles is 70 m.sup.2/g or more. The powder of the present invention has high strength and is capable of exhibiting superior adsorption capability when it is used for an adsorbent an adsorption apparatus has.

A sintering powder comprising: a particulate having a mean longest diameter of less than 10 microns, wherein at least some of the particles forming the particulate comprise a metal at least partially coated with a capping agent. A sintering paste and sintering film comprising the sintering powder. A method for making a sintered joint by sintering the sintering powder, paste, or film in the vicinity of two or more workpieces.