1. Lub cev thiab tshuaj hloov pauv ntawm silica cib thaum lub sij hawm tua hluav taws. Cov silica cib tau txais cov kev hloov pauv hauv qab no hauv qhov kub thiab txias thaum lub sijhawm tua hluav taws: cov dej seem seem tawm ntawm cov cib qis dua 150 degree, thiab Ca (OH) 2 pib evaporate ntawm 450 degree. Decompose; ntawm 450 ~ 500 degree, Ca (OH) 2 lub cev qhuav dej ua tiav, kev sib xyaw ntawm silica hais thiab cov txiv qaub raug rhuav tshem, thiab lub zog ntawm lub cev ntsuab tau txo qis heev.
Hauv qhov ntau ntawm 550 ~ 650 degree, -quartz hloov mus rau -quartz. Txij li cov txheej txheem hloov pauv tau nrog lub ntim nthuav dav ntawm 0.82%, quartz siv lead ua yuav muaj cov kab nrib pleb nrog ntau qhov sib txawv. Nyob nruab nrab ntawm 600 thiab 700 degree, cov tshuaj tiv thaiv theem ntawm CaO thiab SiO2 pib, thiab lub zog ntawm lub cib nce.
Pib los ntawm 1100 degree, kev hloov pauv ceev ntawm quartz nce zoo heev thiab qhov tshwj xeeb lub ntiajteb txawj nqus ntawm cov cib kuj txo qis. Nyob rau lub sijhawm no, qhov ntim ntawm cov cib nce siab heev vim kev hloov pauv ntawm quartz mus rau qhov tsis tshua muaj qhov sib txawv ntawm qhov sib txawv. Txawm hais tias cov kua theem kuj tseem nce ntxiv rau lub sijhawm no, cov kab nrib pleb tseem tuaj yeem tshwm sim hauv thaj tsam ntawm 1100 ~ 1200.
2. Lub ntim ntawm siliceous bricks hloov thaum lub sij hawm cua sov txheej txheem, uas yog txawv nyob rau hauv txawv kub theem. Raws li kev hloov pauv ntawm ntau hom silica ntsuab lub cev, lawv tuaj yeem muab faib ua theem qis dua 600 degree, 600 ~ 1100 degree, 1100 ~ 1250 degree thiab siab dua 1250 degree. Muaj qhov nthuav dav hauv → quartz hloov ntawm 500 thiab 600 degree .
Ntawm 700 ~ 800 degree, muaj cov tshuaj tiv thaiv theem ntawm CaO thiab SiO2, uas ua rau cov hlab ntsha me me. Ntawm 1000 ~ 1100 degree, qhov shrinkage yog qhov tseem ceeb dua vim yog lub cim ntawm cov kua theem. Los ntawm txog 1200 degree, vim qhov nrawm ntawm quartz hloov pauv, lub cev ntsuab pib nthuav dav heev. Qhov pib kub thiab nce kev sib txawv heev nyob ntawm seb hom khoom siv raw.
