發(fā)布時(shí)間：2018-04-30 04:05

  本文選題：微波燒結(jié) + CoFe_2O_4/BaTiO_3�。� 參考：《上海應(yīng)用技術(shù)大學(xué)》2017年碩士論文

【摘要】：多鐵性材料是指同時(shí)包含兩種及兩種以上鐵的基本性能的材料。近年來,復(fù)合多鐵性材料成為了國內(nèi)外研究的熱點(diǎn),在磁電傳感器、數(shù)據(jù)存儲(chǔ)器、壓電換能器等方面都有很大的應(yīng)用價(jià)值。微波燒結(jié)是新一代燒結(jié)方法,是近年來迅速發(fā)展起來的一種快速燒結(jié)陶瓷的新技術(shù)。與常規(guī)燒結(jié)相比,它具有燒結(jié)溫度低、燒結(jié)時(shí)間短、加熱效率高、安全無污染等特點(diǎn),并且在陶瓷性能方面微波燒結(jié)也優(yōu)于常規(guī)燒結(jié)。本論文選取CoFe_2O_4/BaTiO_3為研究對(duì)象,采用微波輔助燒結(jié)的方式,研究了不同燒結(jié)溫度、不同復(fù)合比例等因素對(duì)材料結(jié)構(gòu)性能的影響。具體內(nèi)容及主要結(jié)論如下:1.采用溶膠凝膠法分別制備鐵電相BaTi03粉體和鐵磁相CoFe_2O_4粉體,通過改變煅燒溫度、保溫時(shí)間、分散劑的含量等幾個(gè)因素,探索出最佳的制備BaTiO_3粉體的條件為煅燒溫度選取1000℃,保溫時(shí)間選取1h,分散劑聚乙二醇6000的含量選取5%;最佳的制備CoFe_2O_4粉體的條件為煅燒溫度選取700℃,保溫時(shí)間選取2h。2.選擇最佳條件下制備得到的BaTiO_3粉末和CoFe_2O_4粉末,進(jìn)行復(fù)合多鐵性材料CoFe_2O_4/BaTiO_3的研究。通過改變鍛燒溫度、保溫時(shí)間等幾個(gè)因素,對(duì)CoFe_2O_4/BaTiO_3陶瓷進(jìn)行鐵電性能、鐵磁性能等研究。本論文采取了微波輔助燒結(jié)溶膠凝膠法和微波輔助燒結(jié)粉末混合法兩種方法制備CoFe_2O_4/BaTiO_3復(fù)合陶瓷。兩種方法制備的CoFe_2O_4/BaTiO_3陶瓷樣品內(nèi)部都會(huì)存在一些小的氣孔,樣品并沒有完全致密化,其中,微波輔助燒結(jié)粉末混合法制備的CoFe_2O_4/BaTiO_3陶瓷的致密度要稍微差一些。但是兩種不同的復(fù)合方式制備得到的CoFe_2O_4/BaTiO_3陶瓷致密度比常規(guī)燒結(jié)要高,而且燒結(jié)時(shí)間大幅度縮短。對(duì)比兩種方式制備的CoFe_2O_4/BaTiO_3陶瓷的磁性能和鐵電性能,可以看出在其它條件相同的情況下微波輔助燒結(jié)粉末混合法制備的CoFe_2O_4/BaTiO_3陶瓷比微波輔助燒結(jié)溶膠凝膠法制備的CoFe_2O_4/BaTiO_3陶瓷的磁性能和鐵電性能都要好一些。
[Abstract]:Multi-iron materials are materials that contain two or more basic properties of iron at the same time. In recent years, composite multi-iron materials have become a hot research topic at home and abroad, and have great application value in magnetoelectric sensors, data storage, piezoelectric transducers and so on. Microwave sintering is a new generation sintering method and a new technology of rapid sintering ceramics developed rapidly in recent years. Compared with conventional sintering, it has the advantages of low sintering temperature, short sintering time, high heating efficiency, safety and no pollution, and microwave sintering is superior to conventional sintering in ceramic properties. In this paper, CoFe_2O_4/BaTiO_3 was chosen as the research object, and the effects of different sintering temperature and different composition ratio on the structure and properties of the materials were studied by microwave assisted sintering. The specific contents and main conclusions are as follows: 1. Ferroelectric phase BaTi03 powder and ferromagnetic phase CoFe_2O_4 powder were prepared by sol-gel method. By changing the calcination temperature, holding time, dispersant content and other factors, the optimum conditions for preparing BaTiO_3 powder were found to be 1000 鈩，

本文編號(hào)：1822979