He li'ili'i ka nui o ka nui o ka silica fumed, a he nui kona wahi kiko'ī (80 a 400m2/g). ʻO kona ʻano i loko, ʻaneʻane i hoʻonohonoho pono ʻia ʻekolu-ʻano, a ʻaneʻane ʻaʻohe pūʻulu hydroxyl i loko o nā ʻāpana. No laila, he haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa a me ka adsorption ili ikaika nā ʻāpana o ka silica fumed, a he hopena hoʻoikaika maikaʻi loa. He maikaʻi loa ka ʻikena o ka hui ʻana me ka silica fumed, a ʻoi aku ka maikaʻi o kona mau waiwai mechanical, nā waiwai uila a me ka pale wela.
Eia nō naʻe, ʻo ka hemahema, ʻo ke kumu kūʻai nui o ka silica fumed, hiki ke lele i ka wā o ka hana ʻana, a hiki ke hoʻoulu maʻalahi i ka pahū pahū pahū. No laila, pono e hoʻohana ʻia ka pale kinoea inert i loko o nā lako hana.