Existing methods of extrusion and other techniques to compound host and additives material uniformly disperse the additive in the host. This innovation uses ball milling to a coat a host particle with an additive dramatically reducing the additive required to achieve a percolative network in the host.

The problem of the invention is to provide a method for producing a metal particle composition that can obtain metal material particles having a narrow particle size distribution in a metal material having a lower hardness than silicon. The means for solving the problem is a method for producing a metal particle composition containing particles of a metal material, a component derived from a pulverizing container, and a component derived from beads, the method comprising a step of pulverizing with stirring the metal material containing a metal simple substance having a Mohs hardness of 2.5 to 6.3 in the pulverizing container in the presence of the beads that serve as pulverizing media using a media-stirring type pulverizer equipped with a rotating body,

wherein the mass ratio of the metal material to the beads is 0.02 to 0.10 and
wherein the rotating body has a peripheral speed of 2.5 to 8.5 m/s.

A method of adapting a centrifugal machine that is a dual asymmetric centrifugal mixer or a planetary mill, used for mixing materials, for grinding one or more materials; it includes positioning in a container of the machine, non-spherical grinding media, and securing a lid on the opening of the container, wherein the bases of the units of the non-spherical grinding media are prevented from toppling by having a shortest distance between the center of mass of the unit of non-spherical grinding media and a base be less than half of the width of the base; or securing the lid sufficiently near the top of the units of the non-spherical grinding media such that when a unit of the non-spherical grinding media tilts, the unit of the non-spherical grinding media contacts the lid, the lid acting as an obstacle preventing the unit of the non-spherical grinding media from toppling.

A method of adapting a centrifugal machine that is a dual asymmetric centrifugal mixer or a planetary mill, used for mixing materials, for grinding one or more materials; it includes positioning in a container of the machine, non-spherical grinding media, and securing a lid on the opening of the container, wherein the bases of the units of the non-spherical grinding media are prevented from toppling by having a shortest distance between the center of mass of the unit of non-spherical grinding media and a base be less than half of the width of the base; or securing the lid sufficiently near the top of the units of the non-spherical grinding media such that when a unit of the non-spherical grinding media tilts, the unit of the non-spherical grinding media contacts the lid, the lid acting as an obstacle preventing the unit of the non-spherical grinding media from toppling.

An active/resilient grinding media inside a tube containing a sample is oscillated rapidly by a homogenizer so that the active media is driven in a first direction until it impacts a first end of the tube, which causes it to deform and store an energy charge as it decelerates and stops, and it then accelerates rapidly in the second opposite direction under the discharging force of the stored energy toward the opposite second end of the tube. This cycle of the active media decelerating/charging and then discharging/accelerating is repeated throughout the entire oscillatory processing of the sample. The result is much higher velocities of the active media and therefore much greater impact forces when the sample and active media collide, producing increased efficiency in disruption and size-reduction of the sample particles.

An active/resilient grinding media inside a tube containing a sample is oscillated rapidly by a homogenizer so that the active media is driven in a first direction until it impacts a first end of the tube, which causes it to deform and store an energy charge as it decelerates and stops, and it then accelerates rapidly in the second opposite direction under the discharging force of the stored energy toward the opposite second end of the tube. This cycle of the active media decelerating/charging and then discharging/accelerating is repeated throughout the entire oscillatory processing of the sample. The result is much higher velocities of the active media and therefore much greater impact forces when the sample and active media collide, producing increased efficiency in disruption and size-reduction of the sample particles.

Provided are processes of preventing or eliminating caking of particulate materials during milling operations. Processes include the addition of an anti-caking additive such as a rosin, abietic acid, fatty acid, or derivative of any of the foregoing to a mill prior to or along with a particulate chemical, and milling the combination. The addition of the anti-caking additive prevents or reduces the amount of caking observed thereby increasing yields and maintaining or enhancing the resulting properties of the milled product.

Provided are processes of preventing or eliminating caking of particulate materials during milling operations. Processes include the addition of an anti-caking additive such as a rosin, abietic acid, fatty acid, or derivative of any of the foregoing to a mill prior to or along with a particulate chemical, and milling the combination. The addition of the anti-caking additive prevents or reduces the amount of caking observed thereby increasing yields and maintaining or enhancing the resulting properties of the milled product.

A silicon material can include a silicon aggregate comprising a plurality of porous silicon nanoparticles welded together. The silicon aggregate can optionally have a polyhedral morphology. A method can include: receiving a plurality of porous silicon nanoparticles and cold welding the plurality of porous silicon nanoparticles into an aggregated silicon particle.

Provided is an organic nanoparticle production method comprising a step in which a mixture of beads having an average particle size at least 0.15 mm and no more than a value (mm) calculated by the formula 1.07−0.11×[outer peripheral speed of the stirring rotor (m/sec)] and a slurry containing organic particles is stirred by a stirring rotor rotating at an outer peripheral speed of 7 m/sec or less in a vessel of a wet bead mill.