nGimat developed the NanoSpraySM Combustion Processing technology to produce nanoEngineered MaterialsTM, including nanopowder and thin films at costs enabling wide-scale commercialization. At the heart of the technology is the proprietary NanomiserTM device, which is an innovative liquid atomizer that can produce an aerosol of controlled size down to sub-micron range from 0.002 to 4 L/min flow rates without any atomizing gas. The ability to produce small-size droplets with narrow size distribution is of critical importance in the NanoSpraySM Combustion Processing technology, where precursor solutions are converted to a fine mist that is efficiently combusted in nanopowder and thin film deposition applications. nGimat is also implementing the NanomiserTM device to enable improved mixing leading to uniform and complete combustion in SI engine and gas turbine combustion systems. In addition, it can be used, without combustion of the aerosol, to spray polymers for film or nanopowder formation and to convert pharmaceuticals to submicron- and nano-size particles.
The graph below shows droplet size distribution for the NanoSpray Process of a typical nGimat solution (measured using Malvern Sizer 2600). Note that the detector limit is 1.2 micrometers.
NanoSpray Combustion Processing flame temperature (using flame pyrometry) and species concentration (using emission spectrometry) profiles have been measured. A temperature profile is shown below. This work was sponsored by the National Science Foundation (NSF Grant # 9861324), and the National Institute of Standards and Technology (ATP Grant # 1998-03-0054).
nGimat believes its NanoSpray Combustion Processing technology and its Nanomiser device can be adapted to a wide variety of manufacturing environments, such as continuous web, wafer fabrication, and high volume individual parts. nGimat’s view of the advantages of its technologies relative to competing coating, nanopowder, and spray technologies are highlighted in the following chart:
nGimat’s NanoSpray Combustion Processing Versus Traditional Techniques
|CVD||PVD||Sol-Gel||CCVD||Ultrasonic & Electrostatic||NanoSpray Process|
|Substrate or Nanopowders||O||O||–||+||O||++|
– = Less than Standard; O = Standard; + = Better than Standard