A calcined microsphere of ultrafine bauxite particles having a mean particle size in the range 0.01 to 0.3 micrometers, said microspher having a particle size less than 30 micrometers and being characterised by a substantially solid form having a pycnometric density substantially falling in the range 3.2 - 3.9 g/cm<3>, a BET surface area substantially falling in the range 0.05 to 0.5 m<2>/g and a crystal grain size less than 4 micrometers, the surface chemistry of the microsphere being modified to enhance the wettability to the microsphere and to improve its ability to bond strongly with matrix materials in use.
申请公布号
AT108425(T)
申请公布日期
1994.07.15
申请号
AT19900314167T
申请日期
1990.12.21
申请人
COMALCO ALUMINIUM LIMITED
发明人
XIA, KENONG;SMITH, THOMAS KEITH;SHAW, RAYMOND WALTER;HEATHCOCK, CHRISTOPHER JOHN;EDWARDS, LESLIE CHARLES;COUPER, MALCOLM JAMES