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首页> 外文期刊>Journal of Materials Engineering and Performance >Design of Experiments Study of Hydroxyapatite Synthesis for Orthopaedic Application Using Fractional Factorial Design
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Design of Experiments Study of Hydroxyapatite Synthesis for Orthopaedic Application Using Fractional Factorial Design

机译：基于分数因子设计的骨科用羟基磷灰石合成实验研究设计。

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摘要

Hydroxyapatite, (HAp), Ca_(10)(PO_4)_6(OH)_2, is a naturally occurring mineral found in the inorganic component of enamel and human bone, consequently the present research focus is its ability to promote bone growth onto femoral implants when the HAp powder is sprayed using plasma thermal spraying. As the sprayed deposit requires certain mechanical and biological performances, the characteristics of the starting HAp powder will provide these properties. Hap powders were synthesized via a wet chemical precipitation technique using a Fractional Factorial, Resolution IV, two-level experimental design to evaluate the critical process parameters (reagent addition rate, reaction temperature, stirring speed, ripening time, initial calcium concentration, and the presence of an inert atmosphere) and their effect (main and interaction) on the final HAp powder characteristics, such as, phase composition, purity, crystallinity, crystallite size, lattice parameters, particle size, and particle size distribution. All six selected variables investigated, showed an influence (either as a minor or major significance) on one or more of the responses investigated, either as a main or interaction effect. However, both the ripening time and the stirring speed were found to significantly affect the majority of the five responses, with the reaction temperature also having a significant effect on the final phase composition, lattice parameters, and particle size.
机译：羟基磷灰石（HAp），Ca_（10）（PO_4）_6（OH）_2是在牙釉质和人体骨骼的无机成分中发现的天然矿物，因此，本研究重点是其促进骨骼在股骨植入物上生长的能力。使用等离子热喷涂喷涂HAp粉末时。由于喷涂的沉积物需要某些机械和生物学性能，因此起始HAp粉末的特性将提供这些特性。混合粉末是通过湿化学沉淀技术使用分数阶因子分解IV级二级实验设计合成的，以评估关键工艺参数（试剂添加速率，反应温度，搅拌速度，熟化时间，初始钙浓度和存在惰性气氛）及其对最终HAp粉末特性的影响（主要和相互作用），例如相组成，纯度，结晶度，微晶尺寸，晶格参数，粒径和粒径分布。调查的所有六个选定变量均显示出对一个或多个调查响应（主要或交互作用）的影响（次要或重要）。然而，发现熟化时间和搅拌速度都显着影响五个响应中的大多数，并且反应温度也对最终相组成，晶格参数和粒度具有显着影响。

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