Silicon Dioxide | 7631-86-9
Products Description
Mushonga wekemikari Silicon Dioxide, inozivikanwawo se silica (kubva kuLatin silex), ioxide yesilicon ine kemikari formula SiO2. Yave ichizivikanwa nekuoma kwayo kubva kare. Silika inonyanya kuwanikwa mumasikirwo sejecha kana quartz, pamwe nemusero madziro e diatoms.
Sirika inogadzirwa nenzira dzinoverengeka dzinosanganisira fused quartz, crystal, fumed silica (kana pyrogenic silica), colloidal silica, silica gel, uye aerogel.
Silika inoshandiswa zvakanyanya mukugadzira girazi remahwindo, magirazi ekunwira, mabhodhoro ezvinwiwa, uye zvimwe zvakawanda zvinoshandiswa. Iyo yakawanda yeoptical fibers yekufonera nhare inogadzirwawo kubva kune silica. Icho chinhu chekutanga mbishi kune akawanda whiteware ceramics senge ivhu, matombo, porcelain, pamwe neindasitiri Portland simende.
Silika chinhu chinowedzera mukugadzirwa kwechikafu, kwainoshandiswa zvakanyanya sechinhu chinoyerera muzvokudya zveupfu, kana kutora mvura mukushandiswa kwehygroscopic. Ndicho chikamu chekutanga chepasi diatomaceous chine zvakawanda zvekushandisa kubva pakusefa kusvika pakudzora zvipembenene. Icho zvakare chikamu chekutanga chemupunga husk ash iyo inoshandiswa, semuenzaniso, mukusefa uye kugadzira simende.
Mafirimu matete e silica akakurira pasilicon wafers kuburikidza neanopisa oxidation nzira anogona kunyatso batsira mumicroelectronics, kwaanoita semagetsi insulators ane yakanyanya kugadzikana kemikari. Mumashandisirwo emagetsi, inogona kuchengetedza iyo silicon, chitoro chekutengesa, ichivharira ikozvino, uye kunyange kuita senzira inodzorwa kudzikamisa kuyerera kwazvino.
Iyo silica-based airgel yakashandiswa muStardust spacecraft kuunganidza kunze kwenyika. Silika inoshandiswawo mukubviswa kweDNA neRNA nekuda kwekugona kwayo kusunga kune nucleic acids pasi pekuvapo kwechaotropes. Se hydrophobic silica inoshandiswa sechikamu che defoamer. Mune hydrated fomu, inoshandiswa mumucheka wemazino sechinhu chakaoma kubvisa kubvisa mazino.
Mukukwanisa kwayo serefractory, inobatsira mufiber fomu semucheka wepamusoro-tembiricha yekudzivirira kupisa. Muzvizoro, inobatsira kune yayo-inoparadzanisa zvimiro uye yakasikwa absorbency. Colloidal silica inoshandiswa sewaini uye juice fining agent. Muzvigadzirwa zvemishonga, silica inobatsira hupfu kuyerera kana mahwendefa akaumbwa. Iyo inoshandiswawo sechinhu chinopisa chekusimudzira musanganiswa wepasi sosi kupisa pombi indasitiri.
Tsanangudzo
| Item | STANDARD |
| Chitarisiko | Upfu chena |
| Kuchena (SiO2, %) | >= 96 |
| Kutorwa kwemafuta (cm3/g) | 2.0~ 3.0 |
| Kurasikirwa pakuomeswa (%) | 4.0~ 8.0 |
| Kurasika pakubatidza (%) | =<8.5 |
| BET (m2/g) | 170 ~ 240 |
| pH (10% mhinduro) | 5.0~ 8.0 |
| Sodium sulfate (seNa2SO4, %) | =<1.0 |
| Arsenic (As) | =<3mg/kg |
| Kutungamira (Pb) | =<5 mg/kg |
| Cadium (Cd) | =< 1 mg/kg |
| Mercury (Hg) | =< 1 mg/kg |
| Zvose zvinorema simbi (sePb) | =<20 mg/kg |
| Yese plate count | =<500cfu/g |
| Salmonella spp./ 10g | Negative |
| Escherichia coli/ 5g | Negative |
