The invention relates to a method for decontaminating a preform made of thermoplastic material by exposing at least part of the preform to reactive species obtained by mixing a precursor agent with a plasma, the plasma being generated by injection of a carrier gas into a reactor, the method including mixing of the precursor agent with the plasma is carried out exclusively outside the reactor before it is in contact with the preform. The invention also relates to a decontamination device for carrying out the method.

A system comprises an apparatus having a nozzle. An element is arranged around the apparatus. A feeder is configured to supply a powder of a material into the apparatus. A gas source is configured to supply a precursor gas into the apparatus and to supply an inert gas to circulate through a space between the element and the apparatus and to exit around the nozzle. A plasma generator is arranged in the apparatus and is configured to ionize the precursor gas and atomize the powder and to eject through the nozzle a jet of particles composed of the atomized powder and the ionized precursor gas onto a substrate arranged adjacent to the nozzle.

Novel processes for forming improved coatings with increased crystallinity and density are provided. The process includes utilizing a laminar plasma plume to form the coatings without use of a separate auxiliary heating or post heat treatment step.

Novel processes for forming improved coatings with increased crystallinity and density are provided. The process includes utilizing a laminar plasma plume to form the coatings without use of a separate auxiliary heating or post heat treatment step.

The present invention concerns a device for the production of hydrogen and solid carbon from C.sub.1 to C.sub.4-alkane-containing gas by means of thermal plasma, a process for the production of hydrogen and solid carbon from C.sub.1 to C.sub.4-alkane-containing gas by means of thermal plasma, and the use of a device in a process for the production of hydrogen and solid carbon from C.sub.1 to C.sub.4-alkane-containing gas by means of a process of the invention.

The present invention concerns a device for the production of hydrogen and solid carbon from C.sub.1 to C.sub.4-alkane-containing gas by means of thermal plasma, a process for the production of hydrogen and solid carbon from C.sub.1 to C.sub.4-alkane-containing gas by means of thermal plasma, and the use of a device in a process for the production of hydrogen and solid carbon from C.sub.1 to C.sub.4-alkane-containing gas by means of a process of the invention.

In order to create a rotating unit for a coating lance device for thermally coating an interior, it is provided that the rotary drive is implemented as a hollow-shaft motor coaxial with the axis of rotation of the tool holder, and wherein the tool holder and the coating material feed, as well as the process media feed, are located centrally relative to the hollow-shaft motor. Furthermore, in order to create a coating lance device for thermally coating an interior, it is proposed to provide such a rotating unit; at least one linear actuator for axial and/or lateral positioning of the rotating unit relative to an interior to be coated; and stationary supply connections for supplying electricity to the coating lance, and for the coating material feed, and for the process media feed.

Provided are a fine particle production apparatus and a fine particle production method that can control the particle sizes of fine particles, and efficiently produce a large amount of fine particles having good particle size uniformity. The present invention comprises: a raw material supply unit which supplies raw materials for fine particle production into thermal plasma flame; a plasma torch in which the thermal plasma flame is generated, and which evaporates the raw material supplied by the raw material supply unit by means of the thermal plasma flame to form a mixture in a gas phase state; and a plasma generation unit which generates thermal plasma flame inside the plasma torch. The plasma generation unit includes: a first coil which surrounds the plasma torch, a second coil which is installed below the first coil in the longitudinal direction of the plasma torch and surrounds the circumference of the plasma torch; a first power supply unit which supplies an amplitude-modulated first high-frequency current to the first coil; and a second power supply unit which supplies an amplitude-modulated second high-frequency current to the second coil. The degree of modulation of the first high-frequency current is smaller than the degree of modulation of the second high-frequency current.

Provided are a fine particle production apparatus and a fine particle production method that can control the particle sizes of fine particles, and efficiently produce a large amount of fine particles having good particle size uniformity. The present invention comprises: a raw material supply unit which supplies raw materials for fine particle production into thermal plasma flame; a plasma torch in which the thermal plasma flame is generated, and which evaporates the raw material supplied by the raw material supply unit by means of the thermal plasma flame to form a mixture in a gas phase state; and a plasma generation unit which generates thermal plasma flame inside the plasma torch. The plasma generation unit includes: a first coil which surrounds the plasma torch, a second coil which is installed below the first coil in the longitudinal direction of the plasma torch and surrounds the circumference of the plasma torch; a first power supply unit which supplies an amplitude-modulated first high-frequency current to the first coil; and a second power supply unit which supplies an amplitude-modulated second high-frequency current to the second coil. The degree of modulation of the first high-frequency current is smaller than the degree of modulation of the second high-frequency current.

An apparatus for providing material feedstock into a plasma of a plasma torch includes a material feeding device having an input end and an output end. The output end of the material feeding device extends at least partially around the periphery of a plasma generated near the output end of the plasma torch. The material feeding device is oriented at an angle with respect to a central axis of the plasma torch.