Mullite
Mullite mullite tsuas yog ib qho ruaj khov crystalline theem los ntawm chav tsev kub mus rau qhov kub siab nyob rau hauv a1203si02 system ntawm tus qauv huab cua siab. Vim tias mullite tau muab tso rau hauv ob txoj hlua txuas, nws cov iav feem ntau nthuav tawm rab koob zoo li thiab columnar qauv. Hauv qee qhov siab alumina, tshwj xeeb yog electrofused mullite, nws tuaj yeem tsim koob xws li mullite siv lead ua network. Mullite yog siv dav vim tias nws lub sijhawm ntev hluav taws ua haujlwm, zoo thermal poob siab ruaj khov, qis thermal expansion coefficient, zoo siab kub nkag tsis kam, siab hnav tsis kam, peeling tsis kam thiab corrosion kuj.
Taw qhia cov yam ntxwv ntawm bluestone mullite cib
Cordierite nyob rau hauv cordierite mullite cib muaj me me thermal expansion coefficient (li 1 × 10-6 ～ 2 × 10-6 ℃ - 1 ntawm 251000 ℃), zoo thermal ua hauj thiab tshuaj lom neeg ruaj khov, tab sis nws cov hluav taws tsis kam, thiab nws yuav txawv ntawm 1470 ℃. Mullite muaj cov hluav taws kub tsis kam thiab siab thermal nthuav coefficient (4.5 × 10-6 ℃ - 1). Nws tuaj yeem pom tias qhov khaus coefficients ntawm cordierite thiab mullite yog qhov sib txawv, uas tuaj yeem ua rau microcracks hauv cordierite mullite cib, uas tau txais txiaj ntsig zoo rau thermal poob siab ntawm cov ntaub ntawv
Vim tias kev tsim cov kub thiab qhov txawv ntawm qhov kub ntawm cordierite ze rau ib leeg. Qhov ntawd yog hais, lub teev ua haujlwm ntawm cordierite yog qhov nqaim, thiab tsis muaj qhov tseem ceeb tsim cordierite ntawm qhov kub qis dua, thaum lub sijhawm kub siab dua yuav ua rau ntau cov iav theem tsim. Yog li, thiaj li yuav txo tau qib iav thiab txhim kho thermal stability ntawm mullite cordierite kiln rooj tog, cordierite thiab mullite feem ntau yog siv los ua cov ntaub ntawv nyoos hauv kev tsim mullite cordierite kiln rooj tog. Hauv tshuab moulding, vim tias grouting molding tuaj yeem xaiv qhov siab grouting moulding, tshuab siab molding
(1) Muaj hluav taws kub tsis kam, thermal shock tsis kam thiab tshuaj lom neeg ruaj khov. Cov rooj tog zaum niaj hnub nrog cov tshuaj lom neeg ruaj khov tsis yooj yim rau cov tshuaj tiv thaiv.
(2) Nws muaj lub zog muaj zog nyob rau hauv chav tsev kub thiab kub siab. Ib qho ntawm cov kev cuam tshuam ntawm kev cog lus yog kev thauj khoom, yog li nws yog qhov tsim nyog los ua tus ris tag nrho ntawm cov khoom thiab cov khoom siv nws tus kheej. Cov ntaub ntawv muaj zog siab tuaj yeem ua rau cov xaim ntawm lub teeb thiab nyias, thiaj li txhim kho kev thauj khoom ntom ntom thiab cov khoom lag luam zoo
(3) Zoo heev thermal conductivity thiab tsis kub. Kev tsim cov khoom lag luam muaj qhov zoo, ua tiav siab thiab tsawg noj
(4) Cov tsos yog tsis tu ncua thiab ntsuas yog qhov tseeb. Lub qhov hluav taws kub deformation ntawm cov khoom muaj feem xyuam nrog sagger Flatness: sagger nplai yog qhov tseeb, uas yog qhov muaj txiaj ntsig rau kev siv tshuab ua haujlwm thiab txhim kho kev ua tau zoo.
Daim ntawv thov ntawm cordierite mullite cib
Lub tshuab hluav taws kub ntawm cov qhov cub tawg tau siv los sib xyaw roj thiab cua thiab xa nws mus rau hauv chav sov ua kom sov. Feem ntau, nws yuav tsum muaj lub zog ua kom txaus rau lub sijhawm hlawv lub sijhawm luv, xyuas kom cov roj thiab cua tau sib xyaw zoo ib yam thiab muaj peev xwm hlawv tau zoo, yog li kom tsis txhob muaj qhov tshwm sim ntawm rov qab txhaj tshuaj. Cordierite mullite cib yog cov tsoos cib siv hauv cov hluav taws xob cov nplais hauv tsev. Tam sim no, pob zeb liab pobzeb mullite, siab alumina Lapis cib thiab mullite cordierite cib siv
Xyoo tsis ntev los no, lub cim tshiab ntawm cordierite mullite cib rau ceramic ci ntsa iab tau tsim los ntawm kev siv Sanshi, uas muaj cov haujlwm lub cev thiab tshuaj lom neeg tau zoo dua, tshwj xeeb tshaj yog thermal shock tsis kam. Cordierite mullite cib kev lag luam tus qauv rau cov nplaim hluav taws kub ua kom kub qhov cub tawg muaj ob qhov tseev kom muaj (rt-cov ntaub ntawv thiab RT-B) rau thermal poob siab (1100 ℃, dej txias), uas tsis tsawg dua 40 zaug thiab tsis tsawg dua 70 npaug feem. Cov. Cov khoom tsim ntawm cov cib no yuav tsum tau siv peb lub pob zeb pob zeb hauv av, tshwj xeeb tshaj yog cov pob zeb pob zeb liab. Txog rau sab saum toj hlawv kub tsoo lub qhov cub, cov cua kub ntawm cov ceramic incinerator siab dua (li 1360 ℃), uas yuav tsum muaj ntau dua thermal poob siab tiv thaiv
Nws yog pom nyob rau hauv kev kuaj mob thiab tus naj npawb ntawm thermal shock stability. Cov dej txias ntawm 1300 ℃ tau pib ua kom tau, tab sis tam sim no nws yuav tsum muaj dej txias ntawm 1100 ℃. Cov seismic ruaj khov tsis yog tsawg dua 100 zaug
