- 15
- Sep
Njerwa ya Zirconium Mullite
Njerwa ya Zirconium Mullite
Ubwino wazogulitsa: kuchuluka kwakukulu, kuchuluka kwakukulu, mphamvu yayikulu pama firiji ndi kutentha kwambiri, kukhazikika kwamphamvu kwamatenthedwe, kutsika kocheperako komanso kutentha kwambiri, komanso kukhazikika kwamankhwala ndikutsutsana ndi media zamchere.
Wonjezerani ntchito: Kwathunthu basi wanzeru mzere refractory kupanga, yobereka lonse
Kugwiritsa Ntchito Kwazinthu: Amagwiritsidwa ntchito kwambiri m’magulu ofunikira amoto monga ma galasi, ma galasi oyatsira magalasi, matumba a ubweya wa thanthwe, mabotolo owotchera zinyalala, matumba a ceramic frit glaze, ng’anjo zamagetsi, ndi zina zambiri.
Mafotokozedwe Akatundu
Njerwa za Zirconium mullite zimapangitsanso mullite poyambitsa ZrO2 kukhala njerwa za A12O3-SiO2, zomwe zimatha kukaniza kukana kwamankhwala, kukana kwamphamvu kwamatenthedwe ndikuchepetsa kuchuluka kwakukula kwa mullite. Nthawi zambiri amapangidwa ndi electrofusion. Amatulutsanso ndi njira yojambulira.
Njerwa ya Zirconium mullite ndichinthu chapadera chogwiritsa ntchito mafakitale a alumina ndi zircon osakanikirana ngati zopangira ndikupanga zirconia mu matrix a mullite kudzera munjira yotsekemera.
Njerwa za Zirconium mullite zimayambitsa zirconia kukhala njerwa za mullite, ndipo kusintha kwa gawo kwa zirconia kumatha kusintha kwambiri makina opangira zida za mullite. Zirconia amalimbikitsa sintering zipangizo mullite. Kuphatikiza kwa ZrO2 kumatha kupititsa patsogolo kuchuluka kwa zinthu za ZTM chifukwa chokhazikitsa malo osungunuka komanso kupanga mipata. Pamene kachigawo kakang’ono ka zirconium mullite njerwa ndi 30%, kuchuluka kwa thupi lobiriwira komwe kumawotchedwa 1530 ° C kumafikira 98%, kulimba kumafika 378MPa, ndipo kulimba kumafika 4.3MPa · m1 / 2.
Zirconium mullite njerwa zimapangidwa kuchokera ku mafakitale alumina ndi zircon poyankha sintering. Chifukwa zomwe zimachitika ndi kusinthana kumachitika nthawi yomweyo, kuwongolera njira kumakhala kovuta. Kawirikawiri, njerwa za zirconium mullite zimatenthedwa pa 1450 ° C kuti ziwonjezeke pakuwombera, kenako zimafunda mpaka 1600 ° C kuti achitepo kanthu. ZrSiO4 imavunda kukhala ZrO2 ndi SiO2 pakatenthedwe kopitilira 1535 ° C, ndipo SiO2 ndi Al2O3 zimapanga miyala ya mullite, chifukwa gawo lina lamadzi limapezeka pakuwonongeka kwa ZrSiO4, ndipo kuwonongeka kwa ZrSiO4 kumatha kuyenga utoto, kukulirakulira malo enieni, ndikulimbikitsa sintering.
Zizindikiro zakuthupi ndi zamankhwala
| polojekiti | Njerwa zotsutsa-zircon | Njerwa zircon zapamwamba kwambiri | Njerwa zircon wamba | Njerwa ya Zirconia Corundum | Njerwa ya Zirconium Mullite | Hafu zirconium njerwa | |
| Zamgululi | ≥65 | ≥65 | ≥63 | ≥31 | ≥20 | 15-20 | |
| SiO2% | ≤33 | ≤33 | ≤34 | ≤21 | – | ≤20 | |
| Al2O3% | – | – | – | ≥46 | ≥60 | 50-60 | |
| Fe2O3% | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.5 | ≤0.5 | ≤1.0 | |
| Zikuoneka porosity% | ≤16 | ≤18 | ≤22 | ≤18 | ≤18 | ≤20 | |
| Kuchulukana kachulukidwe g / cm3 | 3.84 | 3.7 | 3.65 | 3.2 | 3.2 | ≥2.7 | |
| Kupondereza mphamvu kutentha kwa Mpa | ≥130 | ≥100 | ≥90 | ≥110 | ≥150 | ≥100 | |
| Mulingo wobwezeretsanso kusintha% sioposa (1600 ℃ × 8h) | ± 0.2 | ± 0.3 | ± 0.3 | ± 0.3 | ± 0.3 | ± 0.3 | |
| Kutentha koyamba kutsegulira ℃ (0.2MPa, 0.6%) | ≥1700 | ||||||