本文選題：激波等離子　切入點(diǎn)：負(fù)氧平衡炸藥　出處：《中北大學(xué)》2011年碩士論文

【摘要】：采用激波等離子法制備了高純納米多晶氧化鋯粉末。借助熱重分析(TG-DTA)、煅燒試驗(yàn)研究了氣相氧化溫度對(duì)最終粉體性能的影響,通過(guò)x衍射、拉曼光譜、透射電鏡(TEM)等手段對(duì)前驅(qū)體和最終產(chǎn)品的性能進(jìn)行了表征,探討了制備過(guò)程中團(tuán)聚控制機(jī)理。結(jié)果表明:激波等離子體法通過(guò)對(duì)粉體生長(zhǎng)時(shí)間的控制,實(shí)現(xiàn)了對(duì)超微粉體高溫制備過(guò)程中團(tuán)聚的控制,不同的煅燒溫度對(duì)最終產(chǎn)物的相組成影響較大,而對(duì)顆粒的尺寸影響較小,通過(guò)調(diào)整煅燒溫度,可以控制最終粉體的相組成,所制備出粉末為納米四方/單斜氧化鋯多晶,純度高,分散性好,粒徑范圍在11.5nm～16.55nm。 主要研究工作和成果如下: 1).設(shè)計(jì)了TNT與鋯源的混合藥柱以爆轟的方式合成納米氧化鋯,初步證明了激波等離子法合成納米氧化物技術(shù)路線和研究方法。 2).采用激波等離子制備技術(shù)實(shí)現(xiàn)了對(duì)粉體生長(zhǎng)時(shí)間的控制,達(dá)到了對(duì)超微粉體高溫制備過(guò)程中團(tuán)聚的控制。制備出的前驅(qū)體為單質(zhì)碳微粒和納米ZrO_2的混合顆粒粉末,顆粒尺寸在10 nm左右呈球形,ZrO_2的主體相為四方相。 3).氣相氧化可有效地去除前驅(qū)體中單質(zhì)碳微粒,不同的煅燒溫度對(duì)最終產(chǎn)物的相組成影響較大,而對(duì)顆粒的尺寸影響較小,600℃～800℃條件下,得到的最終粉體粒徑范圍在11.5nm～16.55nm,為四方相和單斜相的混晶,通過(guò)調(diào)整煅燒溫度,可以改變最終粉體的晶相組成。
[Abstract]:High purity polycrystalline zirconia powder was prepared by shock plasma method.The influence of gas phase oxidation temperature on the properties of the final powder was studied by means of TG-DTAC, and the properties of the precursor and the final product were characterized by means of x diffraction, Raman spectroscopy and transmission electron microscopy (TEM).The agglomeration control mechanism in the preparation process was discussed.The results show that the shock wave plasma method can control the agglomeration during the preparation of ultrafine powder at high temperature by controlling the growth time of the powder. Different calcination temperature has a great influence on the phase composition of the final product.By adjusting the calcination temperature, the phase composition of the final powder can be controlled. The prepared powder is a nanometer tetragonal / monoclinic zirconia polycrystal with high purity and good dispersion. The particle size ranges from 11.5 nm to 16.55 nm.The main research work and results are as follows:1.A hybrid column of TNT and zirconium source was designed to synthesize nano-zirconia by detonation. The technical route and research method of preparing nano-oxide by shock wave plasma method were preliminarily proved.2.The shock wave plasma technology was used to control the growth time of the powder and to control the agglomeration during the preparation of ultrafine powder at high temperature.The precursor is a mixed particle powder of single carbon particle and nanometer ZrO_2. The particle size is about 10 nm and the main phase of ZZrO _ 2 is tetragonal.Three.Gas phase oxidation can effectively remove the single carbon particles from the precursor. The phase composition of the final product is greatly affected by different calcination temperatures, but the effect on the particle size is smaller at 600 鈩，

本文編號(hào)：1729301