High frequency heating

J. Kurfurstova, M. Hajek, 8th Int. Conf. Microwave and High Frequency Heating, Bayreuth, Germany, 3-7 September, 2001, Book of Abstracts,... 

D. Stuerga, Proc. 6th Int. Conf. Micro-wave and High Frequency Heating, Fermo, Italy, 9-13 September, 1997, pp. 82-83. 

Lumber banding consists of gluing lumber strips, 1/2 to 2 inches in width, on the particleboard edges. These strips are normally used in applications where the particleboard is to be covered with wood veneers. The solid wood strip can be machined to decorative edges and, with the veneer surfaces, the panel is fully as functional and attractive as a solid wood panel, but at a lower cost. The lumber bands are normally bonded to the particleboard with polyvinyl acetate or urea-formaldehyde adhesives, cured rapidly by either contact or high frequency heating. 

The overall yield based on chlorine is 65 percent. The combined yield for Reactions (22-67) and (22-68) is about 95 percent, whereas the yield for Reaction (22-69) is 70 percent. Japanese patent SHO-62-83308 claims to increase hydrazine yield by almost 10 percent by high-frequency heating immediately after the reactants are mixed in Reaction (22-68). 

With respect to the evaporation technique used, an increasing portion of ions in the vapour is observed in the direction of resistance heating (boats), heating with electron beams (E-guns) and high-frequency heating. The portion of ions is further increased by collision in the plasma. 

B. Toukoniitty, J.-P. Mikkoia, T. Salmi, D. Yu Muezin, Proceeding of the 10th International Conference on Microwave and High Frequency Heating, Modena (Italy), 2005. 

Special furnaces iridium and timgsten wire furnaces, high-frequency heating furnaces, cathode ray ovens, arc furnaces, etc. 

Materials with a low o rgen content are best subjected to a preliminary homogenization treatment, either by high-frequency heating in high vacuum, or by so-called button-melting in an electric arc, which is familiar in titanium metallurgy. 

Samuel [146] patented a high-frequency heating process, described in more detail by Lockington [147], which has also been investigated by Russian workers diffusion rates were increased by this means with a consequent decrease in process time. 

Vaidhyanathan, B. Annapoorani, K. Wang, J. Binner, J.G.P. Raghavendra, R. Proc. of the International Conference on Microwave and High Frequency Heating, Loughborough, UK, 31-34, (2003). 

Additional heating up to ignition, for commercial reactors as well, is afforded by the additional heating methods already in use, viz., neutral injection and high-frequency heating. Neutral injection would require injectors for energies of over 300 KeV and so use would have to be made of negative ion sources, the technique of which has not yet been developed (Fig. 6). 

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