Sebopeho se seholo sa lik'hemik'hale tsa lifaha tse phaphametseng ke oxide ea silicon le aluminium, moo dikahare tsa silicon dioxide di ka bang 50-65%, mme dikahare tsa aluminium oxide di ka bang 25-35%. Hobane ntlha ya ho qhibiliha ha silika e hodimo ho fihla ho 1725 ℃ mme ya alumina e le 2050 ℃, kaofela ke thepa e phahameng ya ho hanyetsa. Ka hona, difaha tse phaphametseng di na le ho hanyetsa ho hoholo haholo, ka kakaretso ho fihla ho 1600-1700 ℃, e leng se etsang hore e be difaha tse ntle tsa ho thibela kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kgatello ya kha ... Ka hona, lifaha tse phaphametseng ha li bobebe feela ka boima (boima ba bophahamo ba 250-450 kg / m3), empa hape li ntle haholo ka ho kenya mocheso (mocheso o tsamaisang mocheso 0.08-0.1 mochesong oa kamore), e leng se behang motheo oa hore li bapale karolo ea bohlokoa tšimong ea thepa ea ho kenya mocheso o bobebe.

Ho thatafala le matla a maholo. Hobane sefaha se phaphametseng ke 'mele o thata oa khalase o entsoeng ka karolo ea diminerale ea silica alumina (quartz le mullite), ho thatafala ha sona ho ka fihla ho Mohs 6-7, matla a khatello e sa fetoheng a ka fihla ho 70-140mpa, 'me boima ba sona ba 'nete ke 2.10-2.20g/cm3, e leng se lekanang le sa lefika. Ka hona, lifaha tse phaphametseng li na le matla a phahameng. Ka kakaretso, thepa e bobebe e nang le masoba kapa e se nang letho joalo ka perlite, lefika le belang, diatomite, sepiolite le vermiculite e atolositsoeng e na le bothata le matla a fokolang. Lihlahisoa tsa ho thibela mocheso kapa lihlahisoa tse bobebe tse hanelang tse entsoeng ka tsona li na le bothata ba matla a fokolang. Mefokolo ea tsona ke matla a lifaha tse phaphametseng feela, kahoo lifaha tse phaphametseng li na le melemo e mengata ea tlholisano le ts'ebeliso e pharaletseng. Boholo ba likaroloana bo botle 'me sebaka se itseng sa bokaholimo se seholo. Boholo ba tlhaho ba lifaha tse phaphametseng ke 1-250 μ M. Sebaka se itseng sa bokaholimo ke 300-360cm2 / g, se tšoanang le sa samente. Ka hona, lifaha tse phaphametseng li ka sebelisoa ka kotloloho ntle le ho sila.

Botenya bo ka fihlela litlhoko tsa lihlahisoa tse fapaneng, thepa e meng e bobebe ea ho thibela mocheso ka kakaretso ke boholo bo boholo ba likaroloana (joalo ka perlite, jj.), haeba ho sila ho tla eketsa bokhoni haholo, hoo ho thibela mocheso ho fokotsehang haholo. Ntlheng ena, lifaha tse phaphametseng li na le melemo. Ho thibela motlakase ho babatsehang. Lifaha tse phaphametseng ke thepa e ntle ea ho thibela mocheso 'me ha li tsamaise motlakase. Ka kakaretso, khanyetso ea insulator e fokotseha ka keketseho ea mocheso, empa khanyetso ea slab e phaphametseng e eketseha ka keketseho ea mocheso. Molemo ona ha o na thepa e 'ngoe ea ho thibela mocheso. Ka hona, e ka etsa lihlahisoa tsa ho thibela mocheso tlas'a maemo a mocheso o phahameng.