氧化釔穩定的四方晶氧化鋯多晶（Y-TZP）由於有著優越的機械性能而被應用於牙科。然而，陶瓷沒有直接的骨黏合性質，並且在植入後的界面處被非黏附纖維層覆蓋。生物活性矽酸鈣作為添加劑可用於改善Y-TZP的成骨作用。所謂的低溫降解（LTD）是為了解決Y-TZP在潮濕環境如水中的樣品表面可能遭受緩慢的四方晶體結構至單斜晶體結構（t-m）的轉變，隨後是微裂紋產生及強度喪失，在這項研究中，在130℃下在水中研究了CaSi / Y-TZP陶瓷的低溫老化1天和7天，並通過晶相組成和機械性能的評估。結果表明，複合陶瓷中較高的CaSi含量，陶瓷的雙軸強度較低。有趣的是，所有樣品皆顯示t-ZrO2結晶相為主要成分，且與m-ZrO2結晶相的含量下降相關。 CaSi組分不影響ZrO2的（t-m）相變。更重要的是，低溫老化不影響複合陶瓷的相組成和機械性能。Yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) have been used for dental applications because of its beneficial mechanical properties. However, the ceramic has no direct bone bonding properties and is covered by a non-adherent fibrous layer at the interface after implantation. Bioactive calcium silicate can be used an additive phase to improve the osteogenesis of the Y-TZP. So-called low-temperature degradation (LTD) is to address that Y-TZP can suffer a slow, tetragonal-to-monoclinic (t–m) transformation at the sample surface in a humid atmosphere such as water, followed by microcracking and a loss in strength. In this study, the low temperature aging of a CaSi/Y-TZP ceramic was investigated at 130 °C in water for 1 day and 7 day and by evaluation of phase composition and mechanical properties. The results indicated that the higher CaSi content in the composite ceramic, the lower biaxial strength of the ceramic was found. Interestingly, all samples indicated t-ZrO2 as the dominant phase associated with lower m-ZrO2. The CaSi components did not affect the (t–m) phase transformation of ZrO2. More importantly, the low temperature aging did not affect the phase composition and mechanical properties of the composite ceramics.
