Saphikon

Construction and Operation of the Sapphire NMR Tube. Sapphire was chosen as the material for tube construction because its excellent tensile strength characteristics can be uniformly retained in a tube grown intact as a single crystal. Tubes 5 mm in o.d., with 0.8 mm wall and sealed at one end, were chosen for our prototype and were purchased from Saphikon, Inc. (51 Powers Street, Milford, NH 03055) at the time of our original purchase, the cost of the tubes was approximately 300 each. 

Saphikon (www.saphikon.com) gives current examples of using alumina fibers in medicine. 

Saphikon Saphikon 100% AI2O3 3.96 single-crystal a-Al203 125 mono filament edge defined film- fed growth 470 3.5 9 developmental fibers... 

M corporation, St. Paul, MN Major supplier is Saphikon, Inc., Milford, NH... 

K. K. Chawla, H. Liu, J. Janczak-Rusch, and S. Sambasivan, Microstmcture and properties of monazite (LaP04) coated saphikon fiber/alumina matrix composites, J. Eur. Ceram. Soc., 20 551—559 (2000). 

In summary, continuous sapphire fibers are commercially available, and new YAG fibers are readily achieved with the Saphikon process, or the LHPG process (see Chapter 6), or else by the new containerless laser melt process (Chapter 4). Currently however, there is only one route known, i.e., HP-LCVD, that might eventually be capable of yielding continuous, single crystal fibers such as SiC or titanium carbide fibers. A single crystal SiC fiber by LCVD has... 

Saphikon. Trade-name. Single-crystal sapphire filaments. Tyco Laboratories, Waltham, Mass. USA. 

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