真空潛弧系統製備鈦鎳合金奈米金屬粒子懸浮液與其性質研究

Submerged Arc Nanoparticles Synthesis System (SANSS) Prepared Suspension of NiTi Alloy Nanoparticles and to Properties Analyzed

徐逸群(YI-CHUN HSU)

指導教授 ： 鍾清枝

國立臺北科技大學/機電學院/機電整合研究所/碩士(2005年)

https://doi.org/10.6841/NTUT.2005.00119

摘要

本研究是利用真空潛弧製造系統(SANSS)來製備奈米合金懸浮液，實驗所選用之材料為鈦鎳合金，由於NiTi材料在奈米尺寸上的討論研究並不多，而在巨觀上具有形狀記憶、耐腐蝕性高、和適用於人體等特殊性質，所以本實驗除了嘗試利用SANSS製備出鈦鎳奈米合金懸浮液外，並針對磁性和光催化方面的檢測做初步的研究。
在製備奈米懸浮液方面，經由參數選定後，利用載液(乙二醇)做收集，所製備的金屬微粒尺寸平均在100nm以下，經由XRD檢測進一步確認微粒的結構，證實所製備出的粒子經過Sec.B.37,1803[1981]圖譜比對確實為鈦鎳合金。懸浮粒子在pH=9.5時位在接近等電點，粒子表面不帶電且無排斥力，製程中的pH固定在7.5∼8.0之間，微粒在載液中具有較高的懸浮性。另外將製備出的NiTi奈米流體以超導量子干涉磁化儀(SQUID)磁性檢測，發現鈦鎳奈米合金流體呈現順磁的現象。接著將自然氧化的NiTi奈米微粒氧化物經過XRD比對發現微粒氧化後為NiTiO3的型態，但粒徑由原先100nm以下成長後其最大顆粒約為200nm左右。將NiTi塊材、NiTi奈米微粒、NiTiO3進行磁特性的比較，發現氧化後的NiTi奈米微粒磁特性中飽和磁化量下降，奈米化後微粒的飽和磁化量為塊材和氧化後的NiTi奈米微粒氧化物時的10倍左右，屬於磁性奈米金屬微粒。接著和商用TiO2進行光催化實驗比較，發現氧化後NiTiO3和商用TiO2一樣有光催化的效果，且在酸液中和在鹼液中的效果要優於在中性液中，原因是進行光催化反應的比表面積較高所致。

關鍵字

真空潛弧 ； 鈦鎳合金 ； 磁滯曲線 ； 超順磁性 ； 表面電位 ； 光催化

並列摘要

This study investigates the manufacture technique of NiTi alloy nanopraticles fluid by Submerged Arc Nanoparticle Synthesis System . Because studys about NiTi being nanoparticles are lesser，Except for making NiTi alloy nanoparticles ,we discuss the nature character of NiTi alloy nanoparticless about magnetism at first.At manufacturing nanofluids,We accept paeticles using Ethylence glycol,and these particles’ average sizes are under 100 nm.We cconfirm the nanofluid be arranged about NiTi alloy particles by using XRD to check.At pH=9.5,particles are close to zeta potential at zero. Because particles surface have on electrons to repel,so that particles are easy to silt up quickly.At pH＜6.5,particles are corroded and silt up.At pH=7.5∼8.5,particles are suspension at liquid. We discuss the NiTi alloy nanoparticles about magnetism by SQUID and particles show paramagnetism. NiTi alloy nanoparticles are oxidized naturily are tested by XRD、FE-SEM、EDX and we find NiTi alloy nanoparticles change to NiTiO3 that size change form under 100nm to 200nm.We take NiTi alloy、NiTi alloy nanoparticles、NiTiO3 nanoparticles to compare about magnetism and find NiTi alloy、NiTiO3 nanoparticles are more lesser 10 double than NiTi alloy nanoparticles about saturated magnetization .After NiTi alloy change nanoparticles，we find NiTi allo’s magnetism be outstanding . We take NiTi alloy nanoparticles 、NiTiO3 nanoparticles、commercial TiO2 to study photolysis experimentation,and find NiTiO3 nanoparticles can decompose methyl that the situation is similar with commercial TiO2.The key term: SANSS,NiTi alloy,hysteresis loop, superparamagnetism, Zeta potential, photolysis.

並列關鍵字

SANSS ； NiTi alloy ； hysteresis loop ； superparamagnetism ； Zeta potential ； photolysis

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