Cov Khoom Ntawm Zirconia Ceramics

Zirconia ceramics (ZrO2), nrog cov ntsiab lus siab melting, siab hardness, zoo heev hnav tsis kam, raws li ib tug insulator ntawm ib txwm kub, thiab nyob rau hauv high kub muaj conductive zog. Ntshiab ZrO2 yog dawb, daj lossis grey thaum muaj impurities, thiab feem ntau muaj HfO2, uas tsis yooj yim rau kev sib cais. Zirconia feem ntau yog purified los ntawm zirconium ore.

Zirconia muaj peb hom crystals: low-temperature monoclinic siv lead ua (m-ZrO2), nruab nrab-kub tetragonal siv lead ua (t-ZrO2), high-temperature cubic crystal (c-ZrO2), saum toj no peb muaju muaj nyob rau hauv txawv kub ntau yam, thiab tuaj yeem hloov dua siab tshiab rau ib leeg.

Zirconia ceramics yog ib hom tshiab ntawm high-tech ceramics, ntxiv rau lub zog siab, hardness, kub tsis kam, acid thiab alkali corrosion kuj thiab siab tshuaj stability, tib lub sij hawm nrog khawb kuj, tsis muaj teeb liab shielding, zoo heev tshav kub dissipation kev ua tau zoo. , thaum machinability, zoo tsos nyhuv, haum rau loj ntau lawm.

1. Siab melting point

Lub melting point ntawm zirconia yog 2715 ℃, thiab lub siab melting point thiab chemical inertness ua zirconia ib tug zoo refractory khoom.

2. siab hardness, zoo hnav tsis kam

Zirconia ceramics muaj zog dua thiab hnav zoo dua. Los ntawm cov ntaub ntawv tshwj xeeb, Mohs hardness ntawm zirconia ceramics yog hais txog 8.5, uas yog ze heev rau Mohs hardness ntawm sapphire 9.

3. lub zog thiab toughness kuj loj

Zirconia ceramics muaj lub zog siab (txog 1500MPa).

4. Tsawg thermal conductivity, qis expansion coefficient

Lub thermal conductivity ntawm zirconia yog qhov qis tshaj hauv cov ntaub ntawv ceramic (1.6-2.03W / (mk)), thiab coefficient ntawm thermal expansion yog ze rau cov hlau. Yog li, zirconia ceramics yog tsim rau cov khoom siv ceramic.

5. hluav taws xob ua haujlwm zoo

Lub dielectric qhov tsis tu ncua ntawm zirconia yog 3 npaug ntawm sapphire, lub teeb liab yog qhov rhiab dua, thiab nws yog qhov tsim nyog rau kev paub txog cov ntiv tes. Raws li qhov kev xav ntawm kev tiv thaiv kev ua tau zoo, zirconia ceramics, raws li cov khoom siv tsis yog hlau, tsis muaj kev tiv thaiv kev cuam tshuam ntawm electromagnetic signals, thiab yuav tsis cuam tshuam rau cov kav hlau txais xov sab hauv, uas tuaj yeem yooj yim sib xyaw thiab hloov mus rau 5G era.