氧化镁部分稳定氧化锆 (Mg-PSZ) 的结构稳定性、机械性能和耐腐蚀性能评估,Molecules

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氧化镁部分稳定氧化锆 (Mg-PSZ) 的结构稳定性、机械性能和耐腐蚀性能评估
Molecules ( IF 4.2 ) Pub Date : 2023-08-14 , DOI: 10.3390/molecules28166054
Dedek Yusuf ₁ , Eneng Maryani ₂ , Deby Fajar Mardhian _{3,

4} , Atiek Rostika Noviyanti ₁

Affiliation

纳米氧化锆 (ZrO2) 具有优异的机械性能和生物相容性，满足牙科植入物的用途要求，因此已用于牙科植入物。氧化锆在加热过程中发生相变：单斜晶系（室温至 1170 °C）、四方晶系（1170 °C 至 2370 °C）和立方晶系（>2370 °C）。当氧化锆处于多相形式或部分稳定氧化锆 (PSZ) 时，可以获得最有用的机械性能，这是通过添加少量金属氧化物掺杂剂（例如 MgO（氧化镁））来实现的。本研究旨在从印度尼西亚西加里曼丹当地发现的资源合成纳米 Mg-PSZ，并检查其结构稳定性、生化稳定性和机械性能。纳米Mg-PSZ以印度尼西亚西加里曼丹省本地锆石MgSO4·7H2O为原料，以聚乙二醇（PEG）-6000为模板制备。经800℃煅烧后得到的t-ZrO2在室温下表现出稳定。在 Zr0.95Mg0.05O2 处获得了最高百分比的 t-ZrO2 相，变化为 99.5%。Mg-PSZ 的硬度从无 MgO 掺杂的 ZrO2 的 554 MPa 增加到掺杂 10% MgO 的 ZrO2 的 5266 MPa。体外生物降解试验表明，ZrO2中掺杂的MgO浓度越大，Mg-PSZ在模拟体液(SBF)溶液中的耐降解性越大。

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Evaluation of Structural Stability, Mechanical Properties, and Corrosion Resistance of Magnesia Partially Stabilized Zirconia (Mg-PSZ)

Nano Zirconia (ZrO2) has been used in dental implants due to having excellent mechanical properties and biocompatibility that match the requirements for the purpose. Zirconia undergoes phase transformation during heating: monoclinic (room temperature to 1170 °C), tetragonal (1170 °C to 2370 °C), and cubic (>2370 °C). Most useful mechanical properties can be obtained when zirconia is in a multiphase form or in partially stabilized zirconia (PSZ), which is achieved by adding small amounts of a metal oxide dopant, such as MgO (magnesia). This study aimed to synthesize nano Mg-PSZ from a local resource found in West Kalimantan, Indonesia, and examine its structural stability, biochemical stability, and mechanical properties. Nano Mg-PSZ was prepared from a zircon local to Indonesia, from West Kalimantan Province, MgSO4∙7H2O, and polyethylene glycol (PEG)-6000 was used as a template. The obtained t-ZrO2 after calcination at 800 °C was shown to be stable at room temperature. The highest percentage of the t-ZrO2 phase was obtained at Zr0.95Mg0.05O2 with a variation of 99.5%. The hardness of Mg-PSZ increased from 554 MPa for ZrO2 without MgO doping to 5266 MPa for ZrO2 with a doping of 10% MgO. An in vitro biodegradation test showed that the greater the concentration of MgO in doping the ZrO2, the greater the degradation resistance of Mg-PSZ in simulated body fluid (SBF) solution.

更新日期：2023-08-14

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