本文選題：超細(xì)鈦酸鋇 + 碳酸鋇　； 參考：《山東大學(xué)》2015年碩士論文

【摘要】：鈦酸鋇作為重要的電子基礎(chǔ)材料,廣泛應(yīng)用于限流保護(hù)、消磁、啟動(dòng)、發(fā)熱元件(PTC)、積層電容元件(MLCC)、壓電元件、發(fā)光材料等領(lǐng)域。未來(lái)各種各樣的電子設(shè)備都將朝智能化、可靠化、微型化的方向發(fā)展,為實(shí)現(xiàn)這一發(fā)展,對(duì)各種電子元器件的需求將會(huì)大增,而作為重要電子基礎(chǔ)材料的鈦酸鋇的需求將會(huì)大增其應(yīng)用也將更加廣闊。隨著手持及可穿戴電子設(shè)備向小型化、微型化的方向發(fā)展,PTC、MLCC、多層基片等正向小型化、片式化,大容量、低成本及高可靠方向發(fā)展。相應(yīng)的要求鈦酸鋇晶粒在盡可能小的同時(shí)擁有更高的介電常數(shù)。本文概述了鈦酸鋇的相關(guān)性質(zhì)、用途,然后簡(jiǎn)要闡述了鈦酸鋇的幾種生產(chǎn)工藝。特別介紹了固相法制備的傳統(tǒng)方法及新趨勢(shì)、新方法,通過(guò)制備超細(xì)中間體碳酸鋇、二氧化鈦從而合成出超細(xì)鈦酸鋇。本文超細(xì)鈦酸鋇生產(chǎn)制備是基于固相法,采用粒徑有大幅度降低,比表面積有大幅度提升的超細(xì)碳酸鋇和超細(xì)二氧化鈦?zhàn)鳛橹虚g體,從而突破了傳統(tǒng)固相法原料粒徑對(duì)產(chǎn)物粒徑的限制,從而生產(chǎn)出粒徑小、易分散的鈦酸鋇。首先探討了中間體超細(xì)碳酸鋇的生產(chǎn)工藝,采用的原料除雜、除鐵,使用自制A試劑與自制A溶液,通過(guò)對(duì)加料方式、反應(yīng)溫度、保溫、洗滌與微波干燥方式等的調(diào)控得到超細(xì)碳酸鋇,并降低了干燥過(guò)程能耗；然后探討了中間體超細(xì)二氧化鈦的生產(chǎn)工藝,通過(guò)特殊的工藝過(guò)程制備“清、透”的四氯化鈦的水溶液,通過(guò)使用自制B試劑,陶瓷膜過(guò)濾、洗滌,選取合適的煅燒工藝進(jìn)行煅燒,得到超細(xì)二氧化鈦,在使煅燒能耗降低的同時(shí),進(jìn)行了廢液、廢氣的處理；最后由制備的中間體超細(xì)碳酸鋇和中間體超細(xì)二氧化鈦通過(guò)球磨混合,在其中添加自制C試劑以避免雜質(zhì)的引入、大顆粒的產(chǎn)生,減少了溶劑的使用量,降低了漿料在烘干工序中的能耗,烘干后的混合物粉碎至一定目數(shù),然后按一定的工藝要求進(jìn)行煅燒制備鈦酸鋇,再經(jīng)球磨、砂磨分散、噴霧過(guò)篩等后處理措施后,得到成品超細(xì)鈦酸鋇。
[Abstract]:Barium titanate, as an important electronic basic material, is widely used in the fields of current limiting protection, demagnetization, starting, heating element PTC, layer capacitor element MLCC, piezoelectric element, luminescent material and so on. In the future, all kinds of electronic devices will develop in the direction of intelligence, reliability and miniaturization. In order to realize this development, the demand for all kinds of electronic components will increase greatly. The demand of barium titanate, as an important electronic base material, will increase greatly. With the miniaturization and miniaturization of handheld and wearable electronic devices, the development of MLCC, multilayer substrates, such as positive miniaturization, chip size, large capacity, low cost and high reliability. The corresponding requirement is that barium titanate grains should have higher dielectric constant at the same time as possible. The related properties and applications of barium titanate are summarized in this paper, and then several production processes of barium titanate are briefly described. In particular, the traditional method and new trend of solid state preparation were introduced. The ultrafine barium titanate was synthesized by preparing ultrafine intermediate barium carbonate and titanium dioxide. In this paper, the preparation of ultrafine barium titanate is based on the solid phase method, using ultrafine barium carbonate and ultrafine titanium dioxide as intermediates, whose particle size is greatly reduced and the specific surface area is greatly improved. Thus, the limitation of the particle size of the traditional solid material on the particle size of the product was broken, and the barium titanate with small particle size and easy dispersion was produced. The production process of ultrafine barium carbonate, the raw material to remove impurity and iron, the self-made A reagent and the self-made A solution were discussed. The superfine barium carbonate can be obtained by controlling the washing and microwave drying methods, and the energy consumption of the drying process is reduced. Then, the production process of the intermediate ultrafine titanium dioxide is discussed. The permeable titanium tetrachloride aqueous solution was calcined by using self-made B reagent, ceramic membrane filtration, washing and selecting proper calcination process to obtain ultrafine titanium dioxide. While the energy consumption of calcination was reduced, the waste liquid was carried out. Waste gas treatment; finally, the prepared intermediate ultrafine barium carbonate and intermediate ultrafine titanium dioxide are mixed by ball milling, in which self-made C reagent is added to avoid the introduction of impurities, large particles are produced, and the amount of solvent is reduced. The energy consumption of the slurry in the drying process is reduced, the mixture after drying is crushed to a certain number of mesh, then calcined to prepare barium titanate according to certain technological requirements, and then after the post-treatment measures such as ball milling, sanding dispersion, spray sifting, etc., Ultrafine barium titanate was obtained.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ132.35

【共引文獻(xiàn)】

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本文編號(hào)：1885804