Cov teeb meem tshwm sim hauv magnesium oxide refilling sintering suav nrog kev tswj qhov kub tsis zoo, lub sijhawm tuav tsis txaus, tsis muaj kev tiv thaiv huab cua, tsis sib xws, thiab txias txias heev. Cov teeb meem no tuaj yeem ua rau muaj qhov tsis xws luag hauv cov txheej txheem rwb thaiv tsev, uas ua rau kev ua haujlwm tsis zoo lossis tawg thaum lub sijhawm ua haujlwm.
1. Kev tswj kub tsis raug
Tsawg heev kub (<800℃): Fails to activate magnesium oxide grain recrystallization, leading to a loose structure and insufficient insulation strength;
Too high a temperature (>1050 degree): Tej zaum yuav ua rau magnesium oxide volatilization, hlau raj deformation, los yog sealing khoom tsis ua hauj lwm;
Too rapid heating rate (>5℃/ min): Ua kom muaj kev ntxhov siab thermal, ua rau lub raj tawg lossis sab hauv micro- tawg.
Nws raug nquahu kom siv PID ntse tswj qhov ntsuas kub, nrog rau cov ntsuas kub ntsuas kub, kom ntseeg tau qhov ntsuas kub ntawm qhov tseeb hauv ± 10 degree.
2. Lub sij hawm tuav tsis txaus
Tuav lub sij hawm <1 teev: Cov qoob loo loj hlob tsis txaus, recrystallization tsis tiav, cuam tshuam rau rwb thaiv tsev ntom ntom;
Cov tsos mob: Txias rwb thaiv tsev tiv thaiv NW nyuam qhuav ua tau raws li cov qauv, tab sis poob sai sai hauv qhov kub thiab txias.
Hauv kev xyaum, 30% ntawm kev rov ua haujlwm tsis ua haujlwm yog los ntawm kev txo lub sijhawm tuav kom tau raws li cov hnub kawg.
3. Tsis muaj kev tiv thaiv huab cua
Tsis siv high-purity nitrogen los yog lub tshuab nqus tsev ib puag ncig: Magnesium oxide reacts nrog oxygen thiab noo noo ntawm qhov kub thiab txias, tsim cov impurities conductive;
High furnace humidity (RH> 30%): Ua rau cov av noo theem ob, ua rau tsis ua hauj lwm hauv cov av noo;
Cov pa roj tsis txaus: Kev faib tawm tsis sib xws ntawm kev tiv thaiv huab cua, ua rau thaj chaw oxidation lossis carbonization.
Sintering yuav tsum tau ua nyob rau hauv ib qho chaw inert nrog cov ntsiab lus oxygen <100 ppm los tiv thaiv cov khoom deterioration.
4. Cov kev ua tsis zoo hauv cov txheej txheem sau thiab kev sib dhos
Tsis txaus magnesium oxide hmoov purity (<99.9%): Impurities such as Cl⁻ and SO₄²⁻ form electrochemical corrosion channels;
Uneven filling ceev (<2.8 or >3.2 g / cm³): qhov ntom ntom dhau ua rau xoob, thaum qhov ntom ntom ntom ntom ua rau muaj kev ntxhov siab ntau;
Tsis muaj siab - zaus vibration compaction: Internal voids muaj, ua rau lub zos overheating thiab puas thaum lub sij hawm ua hauj lwm.
X-Kev tshuaj xyuas hluav taws xob tuaj yeem tshawb pom qhov tsis xws luag xws li core eccentricity thiab voids.
5. Cov txheej txheem txias tsis raug
Kev quab yuam cua txias lossis dej txias: Cov cua txias nrawm ua rau thermal stress mismatch ntawm cov hlau thiab magnesium oxide txheej, ua rau tawg;
Furnace exit temperature >200 degree: Cov cua sov seem ua rau kev laus lossis deformation ntawm sealant.
Kev txias txias nrog lub cub tawg yog qhov tsim nyog, txo qhov kub ntawm 1000℃mus rau qis dua 200℃hauv 1-2 teev.
6. Cov khoom siv thiab ib puag ncig tsis ua raws li cov qauv
Insufficient cleanroom class (>100,000): Cov plua plav paug tsim cov ntsiab lus tsis muaj zog hauv kev rwb thaiv tsev;
Tsis txaus hydraulic clamping quab yuam: Tsis txaus axial siab ua rau xoob txhaws;
Weared los yog misaligned pwm: Ua rau cov yeeb nkab deformation los yog foob misalignment.
Tsis yog-cov kev cob qhia kws tshaj lij feem ntau ntsib kev kho cov khoom ua tsis tiav vim cov khoom siv rudimentary.
