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26Jul/170

Silicon Nitride Powder – Study the Thorough Summary Relating to Silicon Nitride Powders.

For twenty five years, Tekna has been developing and commercializing both equipment and procedures depending on its induction plasma proprietary technology. Our induction plasma technology is especially well adapted to the production of advanced materials along with the powders needed for new innovative emerging products and manufacturing technologies.

Tekna supplies full-scale productions of a number of Nano powders and micron-sized spherical powders meeting all the requirements of the very demanding industries. Boron Nitride Nanotubes (BNNT) represent the newest group of materials at Tekna.

AC: Would you summarize to our readers the facts from your press release you published earlier this season (May 2015) which announced collaboration together with the National Research Council of Canada (NRC)?

JP: The National Research Council of Canada (NRC) developed, on a Tekna plasma system, an operation to generate boron nitride powder). BNNTs really are a material with the potential to create a big turning point available in the market. Since last spring, Tekna has been around in a unique 20-year agreement with all the NRC to allow the firm to produce Boron Nitride Nanotubes at full-scale production.

BNNTs are an extraordinary material with unique properties which will revolutionise engineered materials across an array of applications including within the defence and security, aerospace, biomedical and automotive sectors. BNNTs possess a structure much like the greater known carbon nanotubes. They share the extraordinary mechanical properties of Carbon Nanotubes but have many different advantages.

AC: How exactly does the dwelling and properties of BNNTs vary from Carbon Nanotubes (CNTs)?

JP: The dwelling of Ni-Ti Powder is really a close analog of the Carbon Nanotubes (CNT). Both CNTs and BNNTs are considered because the strongest light-weight nanomaterials and therefore are excellent thermal conductors.

Although, in comparison with CNTs, BNNTs have a greater thermal stability, an improved effectiveness against oxidation plus a wider band gap (~5.5 eV). This may cause them the best candidate for several fields by which CNTs are now used for insufficient a better alternative. I expect BNNTs to use in transparent bulk composites, high-temperature materials (including metal matrix composites) and radiation shielding.

Comparison in between the main properties of BNNTs and CNTs (Source: NRC)

AC: Do you know the main application areas in which BNNTs can be used?

JP: The applications involving BNNTs will still be inside their very beginning, essentially because of the limited accessibility to this product until 2015. Together with the arrival out there of large supplies of BNNT from Tekna, the scientific community can undertake more in-depth studies of the unique properties of BNNTs that will accelerate the introduction of new applications.

Many applications can be envisioned for Tekna’s BNNT powder as it is a multifunctional and high quality material. I can tell you that, currently, the mix of high stiffness and transparency is being exploited in the development of BNNT-reinforced glass composites.

Also, our prime stiffness of BNNT, and its excellent chemical stability, can certainly make this product an ideal reinforcement in polymers, ceramics and metals.

Besides, many applications where heat dissipation is vital are desperately needing materials with a good thermal conductivity. Tekna’s BNNTs are the most useful allies to further improve not simply the thermal conductivity but also maintaining a precise colour, as needed, because of their high transparency.

Other intrinsic properties of BNNTs may very well promote interest for your integration of BNNTs into new applications. BNNTs have a very good radiation shielding ability, an extremely high electrical resistance and an excellent piezoelectricity.

AC: How exactly does Tekna’s BNNT synthesis process change from methods made use of by other companies?

JP: BNNTs were first synthesized in 1995. Since then, several other processes have already been explored such as the arc-jet plasma method, ball milling-annealing, laser ablation pyrolysis and chemical vapour deposition.

Unfortunately, these processes share a serious limitation: their low yield. Such methods create a low BNNT production which is typically lower than 1 gram per hour. This fault might be in conjunction with the inability to make small diameters.

As a result, the availability of large quantities of high quality BNNTs for applications development using these processes is still a significant challenge.

Fortunately, Tekna’s inductively coupled plasma (ICP) technology has successfully overcome this challenge. The combination of Tekna’s ICP expertise and its partnership with the NRC opened the door to a brand new range of systems capable of producing highly pure BNNTs in significant quantities. Tekna’s system productivity reaches up to 2 orders of magnitude higher than any of the current methods.

AC: What are the advantages of using Tekna’s unique approach in terms of quantity and price for the commercial market?

JP: The productivity and cost efficiency of Tekna’s ICP technology allow for the first time, the supply of kilograms of Boron Nitride Nanotubes, produced at a much lower production cost.

AC: Could you outline the composition of the BNNTs Tekna synthesizes?

JP: The main interesting characteristics include the tube diameter, about 5 nm, and purity (> 50 %). Most nanotubes contain 3 to 5 walls and so are assembled in bundles of a few Silicon nitride sintered powder.

AC: How would you see the BNNT industry progressing on the next 5yrs?

JP: As large volumes have become available, we saw the launch of countless R&D programs based upon Tekna’s BNNT, and also as much higher quantities will be reached over the following 5 years, we are able to only imagine just what the impact could be inside the sciences and industry fields.

AC: Where can our readers discover more details about Tekna plus your BNNTs?

JP: You will discover details about Tekna and BNNT on Tekna’s website and also on our BNNT-dedicated page.

Jérôme Pollak was born in Grenoble, France in 1979. He received the B.Sc. degree in physics in the Université Joseph Fourier, Grenoble. He relocated to Québec (Canada) in 2002 to get results for the organization Air Liquide in the appearance of plasma sources for that detoxification of greenhouse gases.

He continued his studies in Montreal, where he received an M.Sc. and then a Ph.D. degree in plasma physics through the Université de Montréal in 2008. His M.Sc. thesis was 21dexqpky the look and modelling of field applicators to sustain plasma with RF and microwave fields. While his Ph.D. thesis concerned the plasma sterilization of thermosensitive medical devices including catheters. He was further active in the characterization and modelling of cold plasma effects on microorganisms and polymers.

After his Ph.D., he worked for 3 years for Morgan Schaffer in Montreal on the growth of gas chromatographic systems using plasma detectors.

Since 2010, he has worked at Tekna Plasma Systems in Sherbrooke (QC, Canada) as being an R&D coordinator, then as product and repair manager and today as business development director for America. He has been doing charge of various R&D projects and business development activities implying micro-sized powder treatment and nanoparticle synthesis by high temperature plasma.

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