Cov khoom
| Yttrium, 39 Y | |
| Atomic naj npawb (Z) | 39 |
| Phase ntawm STP | khov kho |
| Melting point | 1799 K (1526 ° C, 2779 ° F) |
| Boiling point | 3203 K (2930 ° C, 5306 ° F) |
| Ceev (ze rt) | 4.472 g / cm3 |
| thaum ua kua (ntawm mp) | 4.24 g / cm3 |
| Kub ntawm fusion | 11.42 kJ / mol |
| Kub ntawm vaporization | 363 kJ / mol |
| Molar tshav kub muaj peev xwm | 26.53 J/(mol·K) |
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Yttrium Oxide
Yttrium Oxide, kuj hu ua Yttria, yog ib qho zoo heev mineralizing tus neeg sawv cev rau spinel tsim. Nws yog ib qho huab cua ruaj khov, cov khoom siv dawb. Nws muaj lub siab melting point (2450oC), tshuaj stability, tsis tshua muaj coefficient ntawm thermal expansion, siab transparency rau ob qho tib si pom (70%) thiab infrared (60%) lub teeb, tsawg txiav tawm lub zog ntawm photons. Nws yog tsim rau iav, optic thiab ceramic daim ntaub ntawv.