Kukho iintlobo ezimbini zezinto eziluhlaza zokuvelisa i-alumina esebenzayo, enye "yi-powder esheshayo" eveliswa yi-tricumina okanye ilitye le-Bayer, kwaye enye iveliswa nge-aluminiyam okanye i-aluminium ityuwa okanye zombini ngaxeshanye. X,ρ-alumina kunye nokuveliswa kwe-X,ρ-alumina X, ρ-alumina yeyona r...
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