( 1. 湖南科力豐新能源科技有限公司, 長(zhǎng)沙 410075；
2. 中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室， 長(zhǎng)沙 410083；
3. 中南大學(xué) 物理科學(xué)與技術(shù)學(xué)院, 長(zhǎng)沙 410083)
摘 要: 通過W粉和Ni(NO3)2·6H2O在鉬包套內(nèi)反應(yīng)， 制備出微米尺度的絨球狀結(jié)構(gòu)氧化鎢。 絨球狀結(jié)構(gòu)由長(zhǎng)度達(dá)數(shù)百微米、 外徑1～10 μm的微米管和直徑100~500 nm的亞微米纖維組成。 X射線衍射和透射電子顯微鏡分析表明： 產(chǎn)物為具有良好晶體結(jié)構(gòu)的沿［010］方向生長(zhǎng)的單斜結(jié)構(gòu)的W18O49。 這些通過Vapor-Solid（V-S）生長(zhǎng)機(jī)制形成的絨球狀結(jié)構(gòu)氧化鎢因?yàn)榫哂芯薮蟮谋砻娣e， 在微型半導(dǎo)體敏感元件方面具有巨大的應(yīng)用前景。
關(guān)鍵字: 氧化鎢； 絨球狀結(jié)構(gòu)； 微米管； 纖維
HUANG Bai-yun2
（ 1. Hunan Cofly New Energy Source Co Ltd,
Changsha 410075, China;
2. State Key Laboratory for Powder Metallurgy,
Central South University, Changsha 410083, China;
3. School of Physics Science and Technology,
Central South University, Changsha 410083, China）
Abstract: Micrometer scale tungsten oxide with pompon-like structure was prepared by the reaction of the mixture powder of W and Ni(NO3)2 ·6H2O in a molybdenum envelopment. The pompon-like structure consists of microtubes with outer diameter of 1-10 μm and fibrils with diameter of 100-500 nm which are hundreds of micrometers in length. XRD and TEM analyses show that the as-synthesized product were well-crystallized monoclinic structure W18O49 with the axes preferentially aligned along the ［010］ direction. The pompon-like structure was formed by the Vapor-Solid (V-S) mechanism. With the huge surface of the unique pompon-like structure, the potential application of micrometer scale tungsten oxide in micro-sized semiconductor sensors would be promising.
Key words: tungsten oxide; pompon-like structure; microtubes; fibrils
