Alumina hollow bulb brick/ Setene sa Alumina bubble ke sehlahisoa sa alumina se bobebe se entsoeng ka alumina ea indasteri ka mokhoa oa ho qhibiliha.Litene tse bobebe tsa refractory tse entsoeng ka tleloubu e sekoti li ka sebelisoa e le masela ka har'a libopi tsa mocheso o phahameng tse amanang le malakabe.
Tsa ronalipoleiti tse sututsanglelithupae na le melemo ea lihlahisoa tse phahameng tsa alumina, lihlahisoa tse fokolang tse sa hloekang, ho hanyetsa mocheso o phahameng, botsitso bo botle ba mocheso oa mocheso le coefficient e tlaase ea ho atolosa.