Cov khoom siv ntawm khob khob: muaj pes tsawg leeg thiab cov khoom

Cov khoom siv ntawm khob khob: muaj pes tsawg leeg thiab cov khoom
Khob iav yog feem ntau los ntawm silica, uas yog lub ntsiab tivthaiv ntawm cov xuab zeb. Txawm li cas los xij, Silica ntshiab muaj lub suab nrov heev, ua rau nws nyuaj ua haujlwm nrog. Yog li ntawd, lwm yam tshuaj ntxiv rau cov pa sib xyaw kom txo qis qhov melting taw tes thiab txhim kho nws txoj haujlwm.
Ib qho ntawm cov tshuaj feem ntau yog dej qab zib tshauv, lossis sodium carbonate. Soda tshauv pab kom txo cov melting kub ntawm cov silica, ua kom lub iav yooj yim dua rau cov duab thaum lub sijhawm tsim khoom. Tab sis iav ua nrog silica thiab dej qab zib tshauv yog soluble hauv dej, uas tsis zoo tagnrho rau khob. Yuav kom kov yeej qhov no, txiv qaub, lossis calcium carbonate, ntxiv ntxiv. Txiv qaub ua rau lub khob insoluble thiab ntau ruaj khov. Kev sib xyaw ntawm silica, dej tshauv, thiab txiv qaub ua dab tsi yog hu ua Sida-txiv qaub iav, uas yog hom ntawm cov iav siv rau kev khob.

Cov Dej Qab Zib-Txiv Qaub muaj ntau cov yam ntxwv zoo. Nws yog pob tshab, tso cai rau peb kom pom cov ntsiab lus ntawm lub khob kom meej meej. Qhov kev hloov pauv no kuj ua rau nws zoo nkauj, vim nws tuaj yeem txhim kho qhov pom ntawm kev pom ntawm cov dej haus sab hauv. Nws muaj cov tshuaj ruaj khov zoo, uas txhais tau tias nws tsis hnov ​​zoo yooj yim nrog cov kua dej feem ntau. Qhov no ua rau nws haum rau tuav ntau hom dej haus, los ntawm kua txiv qaub rau Alkaline Sodas.
Lwm cov cuab yeej tseem ceeb ntawm lub khob yog nws hardness. Iav yog qhov nyuaj thiab tiv taus khawb, uas ua kom ntseeg tau tias lub khob tuaj yeem tswj hwm nws lub sijhawm du. Txawm li cas los xij, iav yog nkig, thiab nws tuaj yeem tawg yog tias raug rau kev cuam tshuam tam sim ntawd lossis kev hloov pauv kub heev.
Ntxiv rau cov dej qab zib-kua xim iav, muaj lwm hom khob siv rau cov khob tshwj xeeb. Borosilicate iav, piv txwv li, muaj cov khoom lag luam boron trioxide. Hom iav no muaj ntau dua cov coefficient ntawm thermal expansion piv rau cov dej qab zib-kua quav iav. Raws li qhov tshwm sim, borosilicate iav khob tuaj yeem tiv taus cov pa kub sai yam tsis muaj kev tawg. Lawv feem ntau siv rau cov kas fes mugs lossis chav kuaj cov khob iav uas tuaj yeem ua rau cov dej kub thiab tau txias sai.
Lead Frystal Iav yog lwm hom iav siv rau cov khob iav kawg. Nws muaj cov txhuas oxide, uas muab cov iav ua kom siab dua qhov ntsuas hluav taws xob siab dua. Qhov no txhais tau tias coj Crystal iav khob txim iav ci ntsa iab thiab muaj kev zoo nkauj dua li lub khob iav zoo tib yam. Lawv feem ntau siv rau kev ua kom zoo nkauj caw thiab dai cov goblets, ntxiv ib tus kov ntawm cov khoom kim heev rau ib qho chaw teeb tsa. Qhov muaj pes tsawg leeg thiab cov khoom siv ntawm cov khob siv hauv kev ua lub khob ua si ib lub luag haujlwm tseem ceeb hauv kev txiav txim siab lawv cov haujlwm, durability, thiab kev thov kev ua kom zoo nkauj.