Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/9442
標題: 二氧化鈦與銅在高溫之反應研究
Reactions of Titanium Dioxide and Copper at High Temperature
作者: 方復宣
Fang, Fuxuan
關鍵字: Copper;銅;Titanium Dioxide;High Temperature;二氧化鈦;高溫
出版社: 材料工程學研究所
摘要: 
本研究在探討銅與二氧化鈦在高溫下之反應以及此反應造成微結構
之變化,主要是以以下之氣氛,空氣、氮氣/氧氣=9、氮氣以及氮氣/氫
氣=9,來探討氧分壓對反應之影響。之後以光學顯微鏡以及掃瞄式電子
顯微鏡和能量散射儀來觀察表面變化以及分析組成,並以X光繞射儀分析
微結構變化。 以二氧化鈦粉末包覆銅片在空氣中,以1000℃持溫30分
鐘,有熔化之現象,且二氧化鈦粉塊由原來的白色變為黑色,經X光繞射
儀分析熔化之整個試片結構為氧化銅以及二氧化鈦,這是因為銅片氧化成
氧化銅後與二氧化鈦反應而熔化擴散入二氧化鈦粉塊中,在原來銅片位置
則而形成凹洞。若將銅片置於二氧化鈦粉塊上方,同樣在空氣中以1000℃
持溫30分鐘,置於上方之銅片已熔入二氧化鈦粉塊中,而銅片與二氧化鈦
粉塊接觸面形成一凹陷之現象。上述形成凹洞與凹陷之現象原因相似,主
要是因氧化銅與二氧化鈦之共晶點可能低於1000℃,而氧化銅與二氧化鈦
接觸產生液化現象而形成凹洞與凹陷之情形。 在空氣中以1000℃持
溫,將持溫時間改變由5分鐘至25分鐘,置於二氧化鈦粉塊上方之銅片表
面會形成鬚狀之物體,且隨著時間之增長,鬚狀物由銅片邊緣延伸至整個
銅片,經分析鬚狀物之後其主要成分可能為氧化銅,這應為氧化銅從氧化
銅與二氧化鈦之液態反應中所析出形成的。 以氮氣/氧氣=9之氣氛
在1000℃下持溫3小時,以二氧化鈦粉末包覆銅片之試片已變成黑色,經X
光繞射儀分析結果為氧化銅與二氧化鈦,而內部之銅片也已產生類似前述
之熔化現象,但並未如同在空氣般之劇烈。 以二氧化鈦粉末包覆銅片
之試片通以氮氣,並在1000℃下持溫3小時,試片內部之銅片表面分析後
已氧化成氧化亞銅,包覆銅片之二氧化鈦粉塊持溫後顏色呈現紅棕色,與
氧化亞銅之顏色相近,經分析其結構為二氧化鈦,並無其他之結構產生。
銅片先在氮氣中以1000℃持溫9小時,再以二氧化鈦粉末包覆,而將持溫
溫度升至1055℃以及1075℃,包覆銅片之二氧化鈦粉塊表面可見顏色為紅
棕色,但經分析依然是二氧化鈦並無其他之結構,而1075℃之銅片有些許
熔化之現象應是因為1075℃高於氧化亞銅與銅之共晶點1065℃所致。
而在氮氣/氫氣=9之氣氛下,同樣以二氧化鈦粉末包覆銅片之試片在1000
℃下持溫3小時以及12小時,經X光繞射儀分析之結果為銅與二氧化鈦,銅
片與二氧化鈦粉塊之間則並無明顯之反應。

In this research, we investgated the changes of the
microstructure in the reactions between Cu and TiO2 at high
temperature. The effects of the oxygen partial pressure on the
reaction are discussed. The following gases used air, N2/O2=9,
N2 and N2/H2=9. We analyzed the resulting changes in the
topography and the composition by using optical microscop, SEM,
EDS, etc. The microstructural changes were characterized by XRD.
Copper was first embeded and in the TiO2 powder and then cold
pressed, The samples were heated at 1000℃ for 30 minutes.
Results show that samples melted and TiO2 turned from white to
black. The microstructures were found to be CuO and TiO2. When
copper was placedon the top of TiO2 and then heated up at 1000℃
for 30 minutes in air. Results also show that samples melted.
Since the eutectic point of CuO and TiO2 might be lower than
1000℃, copper would first oxidezed into CuO then diffuse in
liquid state into TiO2.At 1000℃ copper samples were placed on
the top of TiO2 for 5 minutes to 25 minutes. The whisker-like
material appeared on the top of copper surface and grew with
time. The whisker-like material might be mainly CuO after
analysis. In the atmosphere of N2/O2=9, we keep the
temperature at 1000℃ for 3 hr .The samples of the copper
embeded and pressed by TiO2 powder became black. The structures
were CuO and TiO2 and the copper melted but not as dramatic as
in air. The samples of copper embeded and then cold pressed
by TiO2 powder were heated at 1000℃ for 3 hrs in N2 atmosphere.
The copper surface oxidized into Cu2O and the color of TiO2
became red. And the structure was TiO2 only. Copper were
preheated at 1000℃for 9 hrs and then embeded and pressed by
TiO2 and heated at 1055℃ and 1075℃. The color of TiO2 became
red and the structure was only TiO2 still. The copper melted at
1075℃. It is because that 1075℃ is higher than the eutectic
point of Cu2O and Cu. It''s 1065℃. Copper embeded and cold
pressed by TiO2 are heated at 1000℃ for 3 hrs and 12hrs in N2/
H2=9 atmosphere. The structures were Cu and TiO2. There was no
obvious reaction occurred.
URI: http://hdl.handle.net/11455/9442
Appears in Collections:材料科學與工程學系

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