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Evaluation of the Quality of Calcium Phosphate Bioceramics via a Study of the Effects of Thermal Processing

机译:通过热加工的影响评估磷酸钙生物陶瓷的质量

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Thermal conditioning of calcium phosphate bioceramics is often used to enhance the crystallinity and phase purity of the materials. A consideration of the effects that such processing may have on the chemical composition and structure of a particular system can clearly provide information about the nature of the starting material. It is proposed here that carrying out such measurements at a range different temperatures can be helpful in determining the true composition and quality of a given bioceramic material. Accordingly, this paper reports the results of a study to evaluate the properties of commercially available and laboratory synthesised calcium phosphate bioceramic materials before and after heating in the range 400 to 1200 deg C. FTIR and XRD analyses of the as-received materials indicate that in several cases these data do not provide a definitive assessment of the phase purity of the materials due to poor signal-to-noise and peak broadening. Whereas, EDX and XPS experiments do provide some additional useful information, it was still not always possible to ascertain the precise nature of several of the systems of interest. It is shown here that analyses of samples, which have undergone controlled thermal conditioning at various temperatures, can add significantly to our understanding of their chemical composition and phase purity.
机译:磷酸钙生物陶瓷的热调节通常用于增强材料的结晶度和相纯度。考虑到这种处理可能对特定系统的化学组成和结构产生的影响,可以清楚地提供有关原料性质的信息。在此建议,在不同温度范围内进行此类测量有助于确定给定生物陶瓷材料的真实组成和质量。因此,本文报道了一项研究结果,以评估市售的和实验室合成的磷酸钙生物陶瓷材料在400至1200℃范围内加热前后的性能。对所接受材料的FTIR和XRD分析表明,在某些情况下,由于不良的信噪比和峰展宽,这些数据不能对材料的相纯度提供确定的评估。尽管EDX和XPS实验确实提供了一些其他有用的信息,但仍然无法始终确定某些目标系统的精确性质。在此表明,对样品进行了分析,这些样品在各种温度下都经过受控的热调节,可以大大增加我们对它们的化学组成和相纯度的了解。

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