Provided are: a conductive paste in which sinterability of silver particles the conductive paste can be easily controlled by using silver particles having predetermined crystal transformation characteristics defined by an XRD analysis, and after a sintering treatment, excellent electrical conductivity and thermal conductivity can be stably obtained; and a die bonding method using the conductive paste. Disclosed is a conductive paste which includes silver particles having a volume average particle size of 0.1 to 30 m as a sinterable conductive material, and a dispersing medium for making a paste-like form, and in which when the integrated intensity of the peak at 2=380.2 in the X-ray diffraction chart obtainable by an XRD analysis before a sintering treatment of the silver particles is designated as S1, and the integrated intensity of the peak at 2=380.2 in the X-ray diffraction chart obtainable by an XRD analysis after a sintering treatment (250 C., 60 minutes) of the silver particles is designated as S2, the value of S2/S1 is adjusted to a value within the range of 0.2 to 0.8.

The present specification relates to a method for fabricating metal nanoparticles.

Disclosed are interfacially modified particulate and polymer composite material for use in injection molding processes, such as metal injection molding and additive process such as 3D printing. The composite material is uniquely adapted for powder metallurgy processes. Improved products are provided under process conditions through surface modified powders that are produced by extrusion, injection molding, additive processes such as 3D printing, Press and Sinter, or rapid prototyping.

Provided are a sintered material excellent in both thermal stress and bonding strength; a connection structure comprising the sintered material; a composition for bonding with which the sintered material can be produced; and a method for producing the sintered material. The sintered material comprises a base portion, one or more buffer portions, and one or more filling portions. The buffer portions and the filling portions are dispersed in the base portion. The base portion is a metal sintered body, each buffer portion is formed from at least one of a pore and a material that is not the same as that of the sintered body, and each filling portion is formed from at least one of particles and fibers. The sintered material satisfies A>B, where A is the kurtosis of volume distribution of the base portions in a three-dimensional image of the sintered material, and B is the kurtosis of volume distribution of the base portions in a three-dimensional image of the sintered material from which the filling portions are removed.

An example method for producing a seed capable of transforming into a hollow structure includes providing a core, forming a coating around the core to create a coated core, forming an exterior layer surrounding the coated core, forming a layer of release agent surrounding the exterior layer, and heating the core, the coating and the exterior layer. Heating the core, the coating, and the exterior layer to a particular temperature transforms the exterior layer to a fixed shell and produces a seed with the coated core surrounded by the fixed shell. The particular temperature is sufficient to fuse or sinter the exterior layer, but too low to fuse the coating, and too low to cause the core to generate a gas.

A compressed powder body comprises metal particles and an interposed substance which is interposed between the metal particles. Each of the metal particles is made of FeSiAl-based soft magnetic alloy and has a flat shape when seen along a predetermined direction. The metal particles include one or more of the metal particles each of which is formed with one or more predetermined holes. Each of the predetermined holes passes through the metal particle in the predetermined direction. Each of the predetermined holes has a maximum width in a predetermined plane perpendicular to the predetermined direction the maximum width being equal to or larger than a thickness of the metal particle with the predetermined hole in the predetermined direction.

A compressed powder body comprises metal particles and an interposed substance which is interposed between the metal particles. Each of the metal particles is made of FeSiAl-based soft magnetic alloy and has a flat shape when seen along a predetermined direction. The metal particles include one or more of the metal particles each of which is formed with one or more predetermined holes. Each of the predetermined holes passes through the metal particle in the predetermined direction. Each of the predetermined holes has a maximum width in a predetermined plane perpendicular to the predetermined direction the maximum width being equal to or larger than a thickness of the metal particle with the predetermined hole in the predetermined direction.

A sintered material excellent in thermal stress and bonding strength; a connection structure containing the sintered material; a composition for bonding with which the sintered material can be produced; and a method for producing the sintered material. The sintered material has a base portion, buffer portions, and filling portions. The buffer portions and filling portions are dispersed in the base portion. The base portion is a metal sintered body, each buffer portion is formed from a pore and/or material that is not the same as the sintered body, and each filling portion is formed from particles and/or fibers. The sintered material satisfies A>B. A is the kurtosis of volume distribution of the base portions in a three-dimensional image of the sintered material. B is the kurtosis of volume distribution of the base portions in a three-dimensional image of the sintered material from which the filling portions are removed.

A sintered material excellent in thermal stress and bonding strength; a connection structure containing the sintered material; a composition for bonding with which the sintered material can be produced; and a method for producing the sintered material. The sintered material has a base portion, buffer portions, and filling portions. The buffer portions and filling portions are dispersed in the base portion. The base portion is a metal sintered body, each buffer portion is formed from a pore and/or material that is not the same as the sintered body, and each filling portion is formed from particles and/or fibers. The sintered material satisfies A>B. A is the kurtosis of volume distribution of the base portions in a three-dimensional image of the sintered material. B is the kurtosis of volume distribution of the base portions in a three-dimensional image of the sintered material from which the filling portions are removed.

A powder or powder granulate includes a chromium content >80 Ma %, which contains 2 to 20 Ma % iron, optionally up to 5 Ma % dopant, and optionally up to 2 Ma % oxygen, wherein the chromium-containing particles at least partially have pores. The powder displays significantly improved compression behavior and allows the production of sintered components having a very homogeneous distribution of the alloy elements.