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YE Wenting 《等离子体科学和技术》2010,12(5):614-618
Chitosan (CTS) coatings contained calcium (Ca) and phosphorus (P) on titanium (Ti) surface are prepared by the cathode liquid phase plasma technology (CLPT), in a certain concentration electrolyte solution with selective additions of ammonium dihydrogen phosphate and calcium nitrate. It is indicated that the parameters for a stable discharge are voltage of 400 V, frequency of 100 Hz, duty cycle of 30% based on a large amount of experiment data. The morphology, structure and composition of the coated samples are studied by SEM, FTIR, XRD, XPS. The results demonstrate that the composite coatings are uniform, and some solid particles of inorganic salt containing calcium and phosphorus dispersed on the coatings. CA[请写出全称] tests show that the samples treated by the liquid plasma became less hydrophilic. The variation of hydrophilicity on the CLPT treated titanium is attributed to the change of the function groups on the sample surface. Meanwhile, a possible formation mechanism of the composite coatings is discussed. 相似文献
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含锶磷酸钙骨水泥的制备及性能研究 总被引:8,自引:0,他引:8
通过混合磷酸四钙、磷酸氢钙、磷酸氢锶及稀磷酸制备了一种含锶磷酸钙骨水泥(Sr-CPC),研究了水泥固/液比、含锶量及仿生浸泡时间对其结构组态及抗压强度的影响.结果表明,不同组分的CPC在调和浆体时均存在最佳固/液比,且对应的凝结时间适合临床手术要求;Sr-CPC试样在模拟体液(SBF)中浸泡24h后固化产物为含锶缺钙羟基磷灰石;适量锶的加入及较短时间仿生浸泡均可显著改善Sr-CPC固化体的抗压强度,并且浸泡过程对固化体抗压强度的影响主要体现在其微观结构的变化. 相似文献
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本文以H2S与Zn为原料,通过化学气相沉积制备了ZnS块材料。分析了ZnS的沉积过程机理,研究了沉积参数如沉积温度,沉积区压力和H2S、Zn蒸汽、载气Ar流量对ZnS厚度均匀性的影响规律,提出了改善ZnS厚度均匀性,抑制沉积表面球状物生长的途径。 相似文献
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采用化学气相沉积(CVD)法制轩了红外晶体ZnS块材料,用氩气作为载体,反应气体为硫化氢和锌锌蒸气,XPS,IR及能谱分析表明,当沉只温度低于锌蒸发温度时,生成的ZnS中与有锌的关的晶体缺陷有Zn-H功能团及存在于花瓣状态形态中心的锌微粒夹杂,当沉积温度高于锌蒸发温度时,锌微粒夹杂消失,且随沉积温度的升高Zn-H含量减少,Zn-H对红外光在6.2μm波长处吸收峰减弱,使生成的ZnS具有高的红外透过 相似文献
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