Konutai magnesium

Silicates (i te kupu Latin "silex" whakamaoritanga ko rite "kohatu") e huaina metasilicic H2SiO3 tote. Hei tauira, te konutai magnesium, tona matū tātai Kua oti te tuhituhi e whai ake: Na2SiO3. Ko tētahi atu ingoa mō te tote - konutai metasilicate. papatipu titiwha o te taonga ōrite 122,06 g / mol. Āhua - ma tioata puatakore he urukehu puwhero. He rite ki te 2.4 g / cm3 kiato. Te viivii āhuatanga e te taupū hakoko, e ōrite 1,52. ira whakakoero - me 1088 ° C. Ko te rawa he wairewa i roto i te wai, me te rewa i roto i te waipiro. He āhuatanga ahurei te wairewa memeha: Ka taea te rongoa reira ngaro i roto i hua hou ki runga ki te iwa marama i te pāmahana rūma. he kainga i roto i pāpāho kūpapa me te kawakore te konutai magnesium, me te anion waikawa SiO3- tauhohe ki tīhiko H + ki te hanga i te waikawa silicic.

Takawai (i huaina ano hoki takawai anhydride silicic ranei) ko te pūhui tino pūmau e puta noatia i roto i te puka o te kiripaka. Pūkete reira hoki te 12% o te papatipu o te kirinuku o te whenua. Takawai poke ki poke ko te onepu noa, i hanga nei e te whakangaromanga o te kamaka. I raro i te mahi o te alkali i runga i te silica tauhohenga matū: NaOH + SiO2 → Na2SiO3 + H2O. Ka rite ki te hua, he tote waikawa silicic - konutai magnesium. Tauhohenga wai o te tote (whāwehe ki te wai) whai te kaupapa: 2Na2SiO3 + H2O → Na2SiO5 + 2NaOH , me te konutai dvumetasilikat i hanga. Ki te hekenga i roto i te kukū o te otinga, puta paparetanga puai. I roto i te 1n. otinga hydrolyzed o 14% tote i roto i 0.1N. - 28% ki te 0,001% - 32%. kua rere ngoikore tauhohenga wai o te konutai dvumetasilikata.

i hanga Konutai magnesium e te pāhekoheko o te takawai ki te alkali: Si + H2O + 2NaOH → Na2SiO3 + 2H2. kia puta taua tauhohe ki alkalies ngoikore, me he ano hoki rawa ngāwari ki te wai i roto i te aroaro o te ahiahi i te nui iti o OH- tīhiko nui tohu o alkali tangohia i te karaihe. Mai te metasilicate konutai i hanga ko te tote o te waikawa metasilicic ngoikore, i roto i te otinga memeha ko reira tata tino hydrolyzed, e kore e te kukū o ngā katote OH- whakaiti i roto i te tauhohe, na tae mai te reira ki raro, ki te whāwehe o te wai silicon. He tohu o te whakakōkī alkali Present. Mai i 0.63 kg silicon i roto i tenei tikanga whiwhi te 1 m3 o hauwai, mea e rapu utu tata 4 ngā wā atu rino.

I roto i te ahumahi, ngā kōeke o te konutai magnesium, āhuatanga e te ōwehenga o SiO2 me Na2O. Ka taea e rerekē te reira i 2: 1 ki te 3.75: 1. Kūmara ki te ōwehenga o 2.85: 1 a raro e whakaaro taketake. Ko te hunga ki te ōwehenga teitei e te āhuatanga rite "kūpapa." Konutai magnesium i roto i te puka o rongoā kukū waiwai he karaihe wai wairewa ranei. Otiia me ki Na2SiO3 i reira karaihe wai me ētahi atu silicates konutai, Heoi tona hanganga mua whakahuatia e te tātai, i te mea āwhiwhiwhi, Na2O • nSiO2, ai n = 2 ÷ 4. Ko te whakakorenga āta o SiO2 (te tikanga i roto i te rokiroki auroa) arata'i ki te kōkōuri waterglass ranei ki te faafariuraa ētahi wā papatipu gelatinous. Na reira, i roto i te taiwhanga e puritia reira i roto i oko, katia ki puru rapa, rite cortical karaihe ranei ki te kaki o te rakau.

Konutai magnesium whakamahia te i roto i te hanga o puehu hopiwē. Ko te hanga ā-tau o te karaihe whakarewa he rau o nga mano o taranata. Kei te whakamahia te reira ki te whakapakari i te oneone i roto i hanga (hei tauira, te tiaki o te screed raima witi ki abrasion) whakamahia, me te tahi atu tauhohenga, pērā i te konutai tripolyphosphate e i roto i ngā ahumahi maha (e rua o te tote, hei tauira, kei te whakamahia hoki tamarûraa wai). Impregnation Na2SiO3 huarahi pereoo raima nui te whakaiti ratou kākahu.

hoki te rakau ētahi atu rawa ki te tiaki ki te ahi (hei tauira, whare pae tapere ranei) ranei. E mea pinepine te kaimahi te reira rite te pūtake mō ngā tima whakangutungutu ranei pepa kāpia. putty hanganga Simple e tika ana mō te hononga porcelain me te karaihe. Ka taea te rite ratou na roto i te ranu (ki te ōritetanga pokepoke) kotakota ki karaihe wai. Ko te ranunga hohoro whakapakeke ka tahuri ma, me te puranga rawa totoka.

O sima, i konatunatua ki te karaihe wai, kia nohopuku whakapakeke putty, e whakamahia nei mō ngā kohatu hononga. He ranunga o te konutai magnesium ki otaota e whakamahia ki te whakaki i te wāhi i waenganui i te taiepa rua i roto i te tahi mau safes. Tenei hanga ratou ake ahi-ātete, me te kaimahi hoki hei tiaki atu ki te whakatuwheratanga i te tikanga o te rama acetylene tika ki paowa taimaha, me te triggering te whakaoho.