The new Park Air T6 Radio is the lightest and smallest radio in its class, its electricity usage has been lessen and its free of toxic materials like beryllia
Figure 1(a) shows the three-dimensional model of the novel slotted helix SWS, which consists of a slotted helix tape, three Beryllia
support rods and a stainless steel shell.
The plates are commonly made of alumina, but when large lateral heat transfer is required, higher thermal conductivity materials such as beryllia
and aluminum nitride are desired.
Construction material consists of either an alumina or beryllia
body with a proprietary resistor element for optimum performance.
2] 7 820 Quartz (silicone dioxide-silica) Similar to tool steels -- 935 Chromium -- 1,160 Zirconia -- 1,250 Beryllia
8 1,340 Topaz (hydrous aluminum fluorosilicate) -- 1,360 Garnet -- 1,400- Tungsten carbide alloy 1,800 -- 1,550 Zirconium boride 9 -- Corundum Ruby or sapphire (aluminum fluorosilicate) aluminum oxides 9 1,800 Titanium nitride -- 1,880 Tungsten carbide -- 2,000 Tantalum carbide -- 2,100 Zirconium carbide -- 2,100 Alumina -- 2,410 Beryllium carbide -- 2,470 Titanium carbide -- 2,480 Silicone carbide -- 2,500 Aluminum boride -- 2,750 Boron carbide 10 7,000 Diamond (carbon) Table 4--hardness of fillers mixed in batch mixers (ref.
Some data are presented in Appendix B of a 1/8 inch G-10 substrate and a thick disk of beryllia
Another composite material of interest is beryllia
, particle-reinforced beryllium.
The compound bonds to alumina, porcelain, beryllia
, ceramics, glass, plastics, laminates, and metals.
In addition glass, ceramic, beryllia
, zirconia, and quartz are available, as well.
The helices are supported by three beryllia
support rods on which "vanes" are deposited by conventional low-cost thin-film sputtering and etching techniques, thereby precision shaping the required dispersions of the circuits at will.
the world's leading producer of beryllium, its alloys and beryllia
ceramic, reported a net loss in the third quarter of 1991, following two quarters when sales had been significantly less than in the previous year.
The most remarkable property exhibited by AlN is its high thermal conductivity - in ceramic materials second only to beryllia