Fused Alumina Zirconia, Az-25, Az-40

zirconia alumina
Zirconia-corundum
ZA

Qhia luv luv

Fused Alumina-Zirconia yog tsim nyob rau hauv kub kub hluav taws xob arc rauv los ntawm fusing zirconium quartz xuab zeb thiab alumina. Nws yog tus cwj pwm los ntawm cov qauv tawv thiab ntom, siab toughness, zoo thermal stability. Nws yog tsim rau kev tsim loj sib tsoo log rau steel txias thiab foundry snagging, coated cov cuab yeej thiab pob zeb blasting, thiab lwm yam.

Nws kuj yog siv los ua ib qho additive hauv Nruam casting refractories. Vim nws lub siab toughness nws yog siv los muab Mechanical zog nyob rau hauv cov refractories.

Hu rau tam sim no

Specifications

BBrand Spec	UA-25 Index	UA-25 Tus nqi	UA-40 Index	UA-40 Tus nqi
ZrO₂	23% -27%	24%	38% -42%	39%
Al₂O₃	72% min	74%	56% -60%	59%
SiO₂	0.8% max	0.5%	0.60% max	0.4%
Fe₂O₃	0.3% max	0.2%	0.3% max	0.15%
TiO₂	0.8% max	0.7%	0.50% max	0.5%
CaO	0.15% max	0.14%	0.15% max	0.12%
Qhov ceev ceev (g / cm³)	4.2 min	4.23	4,6 nqi	4.65 ib
Xim	Grey lossis Fresh grey		Grey lossis Fresh grey

Txheej Txheem Ntau Lawm Thiab Thov

Fused Alumina - Zirconia yog tsim nyob rau hauv lub kub kub hluav taws xob arc rauv los ntawm fusing zirconium quartz xuab zeb thiab alumina. Nws yog tus cwj pwm los ntawm cov qauv tawv thiab ntom, siab toughness, zoo thermal stability. Nws yog tsim rau kev tsim loj sib tsoo log rau steel txias thiab foundry snagging, coated cov cuab yeej thiab pob zeb blasting, thiab lwm yam.

Nws kuj yog siv los ua ib qho additive hauv Nruam casting refractories. Vim nws lub siab toughness nws yog siv los muab Mechanical zog nyob rau hauv cov refractories.

Yttria-Tetragonal Zirconia Polycrystals (Y-TZP) thiab Alumina (Al2O3) tau nyiam cov xim tseem ceeb rau kev cog cov khoom siv thev naus laus zis vim lawv cov khoom zoo sib xws, xws li siab hardness, tawg toughness, thiab siab zog thiab nruj, Cov yam ntxwv no tau ua rau lawv. Cov ntaub ntawv txaus nyiam rau cov kev siv dav dav uas npog cov biomedical ntau yam uas nws nquag siv hauv kev kho hniav xws li kev cog hniav prosthetic abutments, txuas hniav, hauv paus posts, thiab ceramic crown. Tsis tas li ntawd, lawv kuj tau siv ntau yam kev siv engineering xws li oxygen sensors, thermal barrier coatings, txiav cov cuab yeej, optical fiber connectors, thiab khoom oxide roj hlwb. Nws yog ib nqi sau cia hais tias kev txhim kho nyob rau hauv lub mechanical zog ntawm lub Y-TZP yog ntaus nqi rau nws cov nplua grain loj nrog lub tetragonal rau monoclinic theem transformation. Qhov kev hloov pauv theem no yog nrog los ntawm qhov ntim nce ntawm kwv yees li 3-5% uas ua rau inhibiting tawg propagation thiab yog li txhim kho cov khoom toughness. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum paub tias qhov kev hloov pauv no tuaj yeem tshwm sim nyob rau hauv qee yam xwm txheej. Yog tias zirconia raug kub hnyiab hauv qhov chaw ntub dej ntawm 100 ℃ thiab 300 ℃, uas tuaj yeem ua rau zirconia deterioration, ua rau roughening thiab microcracking. Qhov tshwm sim no yog hu ua hydrothermal aging lossis Low-Temperature Degradation (LTD) thiab tau raug txheeb xyuas tias yog ib qho tseem ceeb rau kev txo qis ntawm zirconia Cheebtsam hauv kev siv orthopedic.

Cov kws tshawb fawb tau tsim ntau qhov sib xyaw uas alumina tau muab tso rau hauv cov qauv zirconia. Lub hom phiaj ntawm qhov kev koom ua ke no yog txhawm rau txhim kho qhov tsis kam ntawm LTD thiab siv cov yam ntxwv tshwj xeeb ntawm cov ceramics los txhim kho cov khoom siv ntawm tetragonal zirconia matrix Ntawm qhov tod tes, muaj cov alumina hauv matrix plays lub luag haujlwm tseem ceeb hauv kev tsim kom muaj kev sib koom ua ke. Cov qauv nruj uas pab tswj cov zirconia hais. Thaum lub caij txias los ntawm sintering kub, tetragonal zirconia nplej tuaj yeem hloov mus rau theem ntawm tetragonal mus rau theem monoclinic. Nyob rau hauv cov ntsiab lus no, alumina pab tswj cov zirconia nplej nyob rau hauv ib tug metastable xeev, tiv thaiv tag nrho transformation mus rau lub monoclinic theem. Qhov kev khaws cia ntawm tetragonal theem no ua rau pom kev txhim kho nyob rau hauv hardness ntawm cov khoom siv ceramic.