Uduce tw'ikirere (cenospheres) tuzwi kandi nka Microsphere ya Ceramic ifite ubudodo, ni uduce tw’ubusamo dufite ubunini buri munsi ya 500µm kandi dufite uburemere bwihariye buri munsi ya 1g/cm³, tworoshye kurusha amazi, bityo duhora dukoreshwa nk'ibikoresho byoroshye. Cenospheres zirangwa na ubudahangarwa bwinshi bw'ubushyuhe n'ubw'imashini kandi biboneka mu bunini butandukanye bw'uduce dukwirakwizwa.
Bikoreshwa cyane muri Ihindagurika, Uruganda rw'ibikomoka ku myanda, Ibyerekeye ibyuma, Ifite sima yoroheje, ibikoresho by'ubwubatsi, Ibice bya Thermoplastic, Ibikoresho byihariye bya Ceramic, n'ibindi.
Uru ruganda rwa mbere rwashinzwe mu 1978, rwahoze ruzwi nka Hebei Shahe New Refractories Co., Ltd., rukora ubushakashatsi, umusaruro, no kugurisha CENOSPHERES, kandi ni rumwe mu nganda za mbere z’abanyamwuga mu Ntara ya Hebei. Dushobora gutanga ubwoko bwinshi bwa cenospheres, imirasire y'imvi n'iy'umweru hafi ya, Al2O3 nyinshi imiyoboro y'ikirere n'imiyoboro y'ikirere ihenze, ingano nini y'ibice by'isi.