1. Misimboti yeChigadzirwa uye Chimiro Chechimiro
1.1 Crystal Chemistry uye Polymorphism
(Silicon Carbide Crucibles)
Silicon carbide (SiC) isimbi yakabatana inoumbwa nesilicon uye kabhoni maatomu akaiswa mune tetrahedral latticework., kugadzirwa pakati pechimwe chezvinhu zvinopisa uye zvinogara mumakemikari zvinonzwisiswa.
Iripo mukati 250 polytypic mhando, pamwe 3c (cubic), 4H, uye 6H hexagonal zvimiro zvichinyanya kukodzera kune yakakwirira-tembiricha application.
Akasimba Si– C zvisungo, nesimba rechisungo richipfuura 300 kJ/mol, ipa kusimba kunoshamisa, thermal conductivity, uye kupikisa kutyisa kwekushisa uye kugadzirwa kwemakemikari.
Mune crucible application, sintered kana reaction-yakasungirirwa SiC inosarudzwa nekuda kwekugona kwayo kuchengetedza kugadzikana kwekuvaka pasi peyakaomesesa yekushisa gradients uye inoparadza yakanyunguduka mhepo..
Kusiyana neokisijeni ceramics, SiC haiite zvinokanganisa shanduko sechikamu chayo che sublimation factor (~ 2700 °C), kuita kuti ive yakakodzera nzira yakagara iri pamusoro 1600 °C.
1.2 Thermal uye Mechanical Performance
Chimiro chinotsanangura cheSiC crucibles ndeyekupisa kwavo kwepamusoro conductivity– kubva 80 ku 120 W/(m · K)– iyo inoshambadzira kutenderera kwekudziya uye inoderedza kusagadzikana kwekupisa mukati mekukurumidza kupisa kana mhepo yekudziya.
Iyi nzvimbo yekugara inosiyana zvakanyanya neyakaderera-conductivity porcelains senge alumina (≈ 30 W/(m · K)), izvo zviri panjodzi yekutyoka pasi pekupisa kwekupisa.
SiC zvakare inoratidza yakasarudzika simba remagetsi pamazinga ekushisa akakwira, kuchengetedza pamusoro 80% yekamuri yayo-tembiricha flexural toughness (sekudaro 400 MPa) kunyange pa 1400 °C.
Iyo yakaderedzwa coefficient yekuwedzera kwekupisa (~ 4.0 × 10 ⁻⁶/ K) inowedzera kuwedzera kupikisa kushamiswa kwekushisa, yakakosha funga kudzokororwa bhasikoro pakati peambient uye inoshanda tembiricha mazinga.
Pamusoro pe, SiC inoratidza premium kupfeka uye abrasion kuramba, kuve nechokwadi chehupenyu hurefu hwesevhisi mumhepo inosanganisa mabatiro emuchina kana kutenderera kwemhepo.
2. Nzira dzekugadzira uye Microstructural Control
( Silicon Carbide Crucibles)
2.1 Sintering Nzira uye Densification Nzira
Industrial SiC crucibles inogadzirwa zvakanyanya kuburikidza nekudzvanywa sintering, kubatanidza mhinduro, kana kupisa kudzvanya, imwe neimwe inopa zvakanakira zvakasarudzika mumutengo, kuchena, uye kuita.
Kusadzvanya sintering kunosanganisira kubatanidza hombe yeSiC poda ine sintering aids senge boron uye kabhoni, zvinotevedzwa nekurapa kwepamusoro-tembiricha (2000– 2200 °C )mumhepo inert kuita pedyo-inoretical density.
Iyi nzira inobereka yakakwirira-kuchena, high-simba crucibles yakakodzera semiconductor uye inofambira mberi alloy kubata.
Reaction-bonded SiC (RBSC) inogadzirwa nekupinza porous kabhoni preform ine yakanyungudutswa silicon, iyo inobata kugadzira β-SiC yakagara, zvichikonzera musanganiswa weSiC uye inodzokororwa nesilicon.
Nepo zvishoma yakaderedzwa mukupisa conductivity nekuda kwesimbi silicon yekuwedzera, RBSC inopa yakanakisa dimensional kugadzikana uye yakaderera mutengo wekugadzira, zvichiita kuti ive yakakurumbira kushandiswa kukuru kwekutengeserana.
Kupisa-kudzvanywa SiC, kunyange zvichidhura, inopa kukora kukuru uye kuchena, yakachengeterwa ultra-inoda application senge single-crystal development.
2.2 Surface Yepamusoro Hunhu uye Geometric Precision
Post-sintering machining, zvinosanganisira kugaya uye kuwacha, inova nechokwadi chekupokana uye yakatsetseka yemukati nzvimbo inoderedza nucleation mawebhusaiti uye kuderedza kusvibiswa kwengozi.
Surface roughness inotariswa nekuchenjerera kumisa thaw attachment uye kufambisa zviri nyore kuburitswa kwezvinhu zvakasimbiswa.
Crucible geometry– zvakaita semadziro emadziro ukobvu, taper angle, uye yakaderera curvature– inowedzerwa kuenzanisa thermal mass, structural stamina, uye kuenderana ne heater burner.
Madhizaini akasimirirwa anotora mamwe mavhoriyamu anonyungudika, kupisa profiles, uye kunzwa kwezvinhu, kuvimbisa kunyatso shanda mumaindasitiri akasiyana siyana.
Advanced quality control, kusanganisira X-ray diffraction, kuongorora electron microscopy, uye ultrasonic kuongorora, inosimbisa microstructural homogeneity uye kushaikwa kwenyaya senge pores kana kupatsanurwa.
3. Chemical Resistance uye Kudyidzana neMelts
3.1 Inertness muAggressive Environments
SiC crucibles inoratidza kuramba kurwiswa kwemakemikari nemasimbi akanyungudutswa, mutsa, uye kwete-oxidizing munyu, kudarika zvakajairika graphite uye oxide ceramics.
Ivo vakachengeteka mukubata neyakanyungudutswa aluminium, mhangura, sirivheri, uye alloys dzavo, kuramba kunyorova uye kunyunguduka semhedzisiro yekuderera kwesimba remukati uye kuumbwa kweanodzivirira pamusoro oxides..
Musilicon uye germanium kubata kwe photovoltaics uye semiconductors, SiC crucibles inodzivirira kusvibiswa kwesimbi kunogona kunetesa zvivakwa zvekugara zvedhijitari.
Zvisinei, pasi peyakanyanya oxidizing mamiriro kana mukuonekwa kwe alkaline shanduko, SiC inogona oxidize kugadzira silica (SiO ₂), iyo inogona kupindura zvakanyanya kuita yakaderera-melting-point silicates.
Nokuda kwechikonzero ichocho, SiC yakanyatso kuenderana nekusarerekera kana kuderedza nharaunda, uko kugadzikana kwayo kunowedzera.
3.2 Kuganhurirwa uye Kuenderana Kufunga
Pasinei nekuoma kwayo, SiC haisi pasi rose inert; inopindirana nezvimwe zvinhu zvakanyungudutswa, kunyanya iron-group metals (Fe, In, Co) pakupisa kwakanyanya ne carburization uye dissolution process.
In liquified steel processing, SiC crucibles inodzikira nekukasira uye nekuda kwechikonzero ichi kudzivirirwa.
Nenzira yakafanana, antacids uye alkaline pasi simbi (e.g., Li, Kare, Ca) inogona kuderedza SiC, kutanga kabhoni uye kugadzira silicides, kudzikisira mashandisiro adzo mukugadzirwa kwezvinhu zvebhatiri kana reactive simbi kukanda.
Kune liquified girazi uye ceramics, SiC inowanzoenderana asi inogona kuratidza trace silicon mukati meiyo yakanyanya kupfava optical kana emagetsi magirazi.
Kuziva izvi zvekushandisa-zvakananga kupindirana kwakakosha pakusarudza iyo yakakodzera crucible mhando uye inovimbisa maitiro kuchena uye crucible hupenyu hurefu..
4. Industrial Applications uye Tekinoroji Evolution
4.1 Metallurgy, Semiconductor, uye Renewable Energy Sectors
SiC crucibles yakakosha mukugadzirwa kwemulticrystalline uye monocrystalline silicon ingots yemabhatiri ezuva., kwavanosimuka kuti vaonekwe kwenguva refu kune yakanyungudutswa silicon pa ~ 1420 °C.
Kuchengetedzeka kwavo kwemafuta kunoita kuti yunifomu iwedzere uye inoderedza density yekubvisa, zvakananga kupesvedzera kushanda kwezuva.
Mumafekitari, SiC crucibles inoshandiswa kunyungudutsa simbi dzisina-ferrous dzakadai sealuminium nendarira., inopa hurefu hwehupenyu uye yakadzikira kukura kwemarara ichienzaniswa nevhu-graphite sarudzo.
Iwo anoshandiswawo mune yakakwirira-tembiricha lab ye thermogravimetric kuongororwa., differential scanning calorimetry, uye synthesis yezvakaomarara porcelains uye intermetallic komisheni.
4.2 Future Fads uye Yepamberi Chigadzirwa Musanganiswa
Zvikumbiro zviri kubuda zvinosanganisira kushandiswa kweSiC crucibles mune inotevera-chizvarwa chenyukireya chekuongorora uye yakanyungudutswa munyu reactor., uko kushorwa kwavo nemwaranzi uye yakanyungudutswa fluorides iri kuongororwa.
Zvipfeko zvakadai se pyrolytic boron nitride (PBN) kana yttria (Y TWO O ₃) iri kuiswa kune SiC nzvimbo dzepamusoro kuwedzera makemikari inertness uye kumisa silicon diffusion mune yekupedzisira-yakanyanya-kuchena maitiro..
Kuwedzera kugadzirwa kwezvinhu zveSiC kuita kushandisa binder jetting kana stereolithography kuri kugadziridzwa, inonakidza nzvimbo geometri uye inokurumidza prototyping yeakasarudzika crucible dhizaini.
Sezvo kudiwa kuri kukura kwekushandisa-simba, kwenguva refu, uye kusvibiswa-isina kubata kwepamusoro-tembiricha kubata, silicon carbide crucibles icharamba iri dombo repakona tekinoroji yemazuva ano muzvigadzirwa zvepamberi kugadzira.
Mukupedzisa, silicon carbide crucibles inomiririra yakakosha inobvumira chinhu mune yakakwirira-tembiricha maindasitiri uye kiriniki maitiro.
Kusanganiswa kwavo kusingaenzaniswi kwekugadzikana kwekupisa, mechanical kuoma, uye kupikisa kwemakemikari kunoita kuti vave zvinhu zvekusarudza kune zvikumbiro apo kushanda uye kuvimbika kwakakosha.
5. Provider
Yepamberi Ceramics yakavambwa muna Gumiguru 17, 2012, ibhizimusi repamusoro-soro rakazvipira mukutsvagisa nekusimudzira, production, processing, kutengesa uye hunyanzvi masevhisi eceramic hama zvinhu uye zvigadzirwa. Zvigadzirwa zvedu zvinosanganisira asi zvisingagumire kuBoron Carbide Ceramic Zvigadzirwa, Boron Nitride Ceramic Zvigadzirwa, Silicon Carbide Ceramic Zvigadzirwa, Silicon Nitride Ceramic Zvigadzirwa, Zirconium Dioxide Ceramic Zvigadzirwa, etc. Kana uchifarira, ndapota inzwa wakasununguka kutibata nesu.
Tags: Silicon Carbide Crucibles, Silicon Carbide Ceramic, Silicon Carbide Ceramic Crucibles
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