Hauv kev kho hniav digital kho hniav, zirconia, nrog nws lub zog siab, biocompatibility zoo heev, thiab kev zoo nkauj, tau dhau los ua cov khoom tseem ceeb rau fabricating crowns, txuas hniav, thiab lwm yam kev kho dua tshiab. The zirconia sintering furnace, as the core equipment for achieving material densification and performance optimization, determines the precision and quality of the restorations through its working principle. Kev nkag siab tob txog nws cov txheej txheem kev khiav hauj lwm pab cov neeg siv kev lag luam zoo tswj cov txheej txheem sintering thiab zoo.
Nyob rau hauv nws lub xeev ntsuab, zirconia muaj ntau qhov pores thiab grain ciam tsis xws luag, ua rau txhua yam muaj zog thiab zoo nkauj kev ua tau zoo uas tsis ua raws li kev thov kev kho mob. High -kub sintering yog qhov tsim nyog kom ua tiav kev sib txuas sib txuas ntxiv, kev hloov pauv ntawm cov nplej, thiab theem hloov pauv. Lub hauv paus ntsiab lus ua haujlwm ntawm lub qhov cub sintering yog kom sov lub pre-fabricated zirconia ntsuab lub cev mus rau qhov kub thiab txias nyob rau hauv ib puag ncig tswj thiab tuav nws rau lub sijhawm txaus. Thermal activation txhawb cov khoom tsiv teb tsaws thiab qhov ntom ntom, thaum kawg ua rau siab - ntom, siab - lub zog ceramic qauv.
Los ntawm qhov kev xav ntawm thermodynamic, cov txheej txheem sintering tuaj yeem muab faib ua plaub theem: preheating, cua sov, tuav, thiab txias. Lub preheating theem aims maj mam nce qhov kub ntawm lub billet kom tsis txhob tawg los ntawm thermal stress vim yog kub ntau sib txawv. Cov cua sov theem nce qhov kub thiab txias rau lub hom phiaj ntawm qhov teeb tsa, feem ntau ntawm 1450℃thiab 1550 degree, nrog kev hloov me ntsis nyob ntawm cov qauv thiab xim ntawm zirconia. The holding stage is crucial for densification, where grain growth and porosity elimination occur simultaneously, achieving the desired mechanical properties and translucency. Cov theem cua txias yuav tsum tau tswj cov cua txias kom tiv thaiv kom txias sai los ntawm kev ua kom muaj kev ntxhov siab sab hauv thiab microcracks.
Txhawm rau kom ua tiav qhov ntsuas kub thiab kev tswj hwm huab cua, niaj hnub zirconia sintering rauv feem ntau siv cov cua sov los yog silicon molybdenum pas nrig cua sov, ua ke nrog PID kaw - voj tswj qhov system los kho cov khoom siv hluav taws xob hauv lub sijhawm tiag tiag, kom ntseeg tau tias qhov kub thiab txias profile zoo sib xws nrog cov txheej txheem yuav tsum tau ua. Lub cub tawg chamber feem ntau yog tsim los ntawm siab - purity refractory cov ntaub ntawv, muaj ob qho tib si tsis tshua muaj cua sov muaj peev xwm thiab siab thermal stability, txo lub zog noj thiab txhim kho kub uniformity. Qee cov khoom siv kuj tau nruab nrog lub tshuab nqus tsev lossis cov roj inert tiv thaiv kom tsis txhob muaj cov khoom oxidation los yog kev sib kis ntawm qhov kub thiab txias, ua kom muaj kev ruaj ntseg ntawm kev kho cov xim thiab muaj pes tsawg leeg.
Zuag qhia tag nrho, kev kho hniav zirconia sintering rauv, los ntawm kev tswj xyuas qhov chaw thermal thiab theem kub tswj, tsav lub zirconia preform kom tau txais kev hloov pauv zoo ntawm nws cov microstructure, yog li muab kev kho dua tshiab nrog lub zog thiab kev zoo nkauj xav tau hauv kev kho mob. Qhov kev ntseeg tau ntawm lub hauv paus ntsiab lus no yog lub hauv paus txheej txheem thev naus laus zis ntawm kev lees paub zoo hauv kev kho hniav kho hniav niaj hnub.
