Abstract
The solid buoyancy material and research status at home and abroad were briefly introduced in this paper, then related research on solid buoyancy material by Technical Institute of Physics and Chemistry(TIPC)of CAS in detail. The high-performance hollow glass microspheres obtained independently through methods of soft chemistry by TIPC. By loading this kind of high-performance hollow glass microspheres into high-strength epoxy resin matrix, solid buoyancy materials of a variety of specification were prepared by pouring in vacuum.Then we obtained samples with densities of 0.40—0.60 g/cm<sup>3</sup>, hydrostatic compression strength of 20—100 MPa.After submersible buoy test of solid buoyancy material of 0.54 g/cm<sup>3</sup> at 4000 m for 155 days, we found that the rate of water absorption is less than 2%. In addition, we also conducted the preliminary research on the solid buoyancy material for full ocean depth; samples can meet the full ocean depth pressure with density of 0.64 g/cm<sup>3</sup> and 0.68 g/cm<sup>3</sup>.
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