本文選題：儲能陶瓷 + 鈦酸鋇��； 參考：《工程科學(xué)學(xué)報》2017年06期

【摘要】：利用水基化學(xué)包覆法在納米鈦酸鋇粉體包覆氧化鋁、二氧化硅和氧化鋅等物質(zhì),并通過兩段式燒結(jié)法制備了平均晶粒尺寸120 nm的超細晶鈦酸鋇基儲能陶瓷.包覆層的存在抑制了晶粒生長和異常晶粒長大,同時將陶瓷的交流擊穿場強大幅提高至150 kV·cm~(-1)以上,儲能密度達到0.829 J·cm~(-3).電子能量損失譜顯示,包覆摻雜的元素明顯偏聚于陶瓷晶界,形成具有芯-殼結(jié)構(gòu)的晶粒.而高溫阻抗譜的測試和擬合結(jié)果則進一步解釋了陶瓷性能改善的原因.雖然此超細晶陶瓷的儲能密度并不十分突出,但其晶粒細小均勻、燒結(jié)溫度低,因而可用于制備多層陶瓷電容器,從而大幅提高儲能密度,這是常見的儲能陶瓷無法實現(xiàn)的.
[Abstract]:Ultrafine barium titanate based energy storage ceramics with average grain size of 120 nm were prepared by water based chemical coating on nano-barium titanate powder, such as alumina, silicon dioxide and zinc oxide. The existence of cladding layer inhibits grain growth and abnormal grain growth. At the same time, the AC breakdown field strength of the ceramics is increased to more than 150kV / cm ~ (-1), and the energy storage density is up to 0.829 J / cm ~ (-1). The electron energy loss spectra show that the coated doped elements tend to converge at the grain boundaries of the ceramics to form grains with core-shell structure. The test and fitting results of high temperature impedance spectrum further explain the improvement of ceramic properties. Although the energy storage density of the ultrafine crystalline ceramics is not very prominent, its grain size is fine and uniform, and the sintering temperature is low, so it can be used to prepare multilayer ceramic capacitors, thus greatly increasing the energy storage density, which can not be realized by common energy storage ceramics.
【作者單位】： 清華大學(xué)新型陶瓷與精細工藝國家重點實驗室;
【基金】：國家重點基礎(chǔ)研究發(fā)展計劃資助項目(2015CB654604) 國家自然科學(xué)基金創(chuàng)新研究群體項目(51221291);國家自然科學(xué)基金資助項目(51272123)
【分類號】：TQ174.1

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本文編號：2028205