本文選題：三水碳酸鎂晶體　切入點(diǎn)：晶型　出處：《遼寧工程技術(shù)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：目前,有關(guān)三水碳酸鎂晶體的合成制備成為研究熱點(diǎn),對(duì)于三水碳酸鎂晶體形貌調(diào)控已被眾多研究者所證實(shí)。但目前的研究主要停留于棒狀形貌晶體制備方面,對(duì)放射狀三水碳酸鎂的制備、外加場(chǎng)對(duì)晶體結(jié)晶形貌的調(diào)控作用以及二者的作用機(jī)理解釋較少。論文旨在對(duì)放射狀三水碳酸鎂晶體和微波輔助合成棒狀三水碳酸鎂的制備過(guò)程進(jìn)行研究,在不改變晶體物化性能的前提下,初步探索制備兩種三水碳酸鎂晶體有效合成方法,為晶體的深入研究及其潛在的低成本工業(yè)化生產(chǎn)提供一些試驗(yàn)參考數(shù)據(jù)。該研究結(jié)果不僅豐富了碳酸鎂晶體形貌可控制備的理論和方法,對(duì)無(wú)機(jī)微納米材料形貌可控制備及低成本、高性能精細(xì)鎂鹽工業(yè)化生產(chǎn)奠定科學(xué)基礎(chǔ),同時(shí)為構(gòu)建微納米材料知識(shí)框架提供理論依據(jù)。論文通過(guò)觀察三水碳酸鎂晶體在液相體系中的形貌演變過(guò)程,分析了其形貌及物相變化規(guī)律,在此基礎(chǔ)上對(duì)放射狀三水碳酸鎂的形成過(guò)程和微波場(chǎng)輔助作用下三水碳酸鎂晶體形貌的形成機(jī)理進(jìn)行了探索研究。在放射狀三水碳酸鎂制備方面,論文考慮了反應(yīng)物濃度、反應(yīng)時(shí)間、反應(yīng)溫度對(duì)試驗(yàn)結(jié)果的影響,由試驗(yàn)可知,NH4HCO3的初始濃度是影響放射狀晶體形成的關(guān)鍵,Mg2+的初始濃度主要控制晶體的生成量,反應(yīng)時(shí)間與反應(yīng)溫度對(duì)放射狀形貌影響不大。在微波輔助液相合成棒狀三水碳酸鎂方面,論文考慮了反應(yīng)時(shí)間與微波輻照能量對(duì)試驗(yàn)結(jié)果的影響,經(jīng)試驗(yàn)證明,當(dāng)反應(yīng)時(shí)間過(guò)長(zhǎng)和微波輻照能量過(guò)高時(shí)都會(huì)導(dǎo)致棒狀晶體結(jié)構(gòu)坍塌,晶體物相由三水碳酸鎂向四水合堿式碳酸鎂轉(zhuǎn)變。最后,論文通過(guò)試驗(yàn)現(xiàn)象的對(duì)比分別揭示了放射狀碳酸鎂晶體及微波輔助制備棒狀碳酸鎂晶體的形貌調(diào)控合成機(jī)理。論文的創(chuàng)新性主要體現(xiàn)在：制備出放射狀三水碳酸鎂,在三水碳酸鎂晶體制備領(lǐng)域領(lǐng)域尚屬首次；將微波場(chǎng)引入合成過(guò)程中,研究微波場(chǎng)在晶體結(jié)晶生長(zhǎng)過(guò)程中的作用,在三水碳酸鎂制備領(lǐng)域也鮮有報(bào)道；論文對(duì)二者的反應(yīng)機(jī)理也做了研究,并對(duì)其形成機(jī)理進(jìn)行了揭示,尤其是發(fā)現(xiàn)了鎂銨絡(luò)合離子,以及其在放射狀三水碳酸鎂晶體合成過(guò)程中起到的作用。
[Abstract]:At present, the synthesis and preparation of magnesium carbonate trihydrate crystal has become a hot topic, and the morphology regulation of magnesium carbonate trihydrate crystal has been confirmed by many researchers. Preparation of radioactive magnesium carbonate trihydrate, The effect of applied field on crystal morphology and the mechanism of their action are few. The purpose of this paper is to study the preparation process of radial magnesium carbonate trihydrate and microwave-assisted synthesis of rod magnesium trihydrate. Without changing the physical and chemical properties of the crystals, the effective synthesis methods of two kinds of magnesium carbonate trihydrate crystals were preliminarily explored. The results not only enrich the theory and method of controlled preparation of magnesium carbonate crystal morphology, but also provide some experimental reference data for the further study of the crystal and its potential low cost industrial production. It lays a scientific foundation for the controlled preparation of inorganic micro and nano materials and the industrial production of fine magnesium salts with low cost and high performance. At the same time, it provides the theoretical basis for constructing the knowledge frame of micro and nano materials. By observing the evolution process of the morphology of magnesium carbonate trihydrate in liquid phase system, the law of morphology and phase change of magnesium carbonate trihydrate crystal is analyzed. On this basis, the formation process of radial magnesium carbonate trihydrate and the formation mechanism of crystal morphology of magnesium carbonate trihydrate under the assistance of microwave field were studied. In the preparation of radial magnesium carbonate trihydrate, the concentration of reactant was considered. The effect of reaction time and reaction temperature on the experimental results shows that the initial concentration of NH _ 4HCO _ 3 is the key to the formation of radial crystals, and the initial concentration of Mg2 mainly controls the amount of crystal formation. The effect of reaction time and reaction temperature on the radial morphology was not significant. In the microwave assisted liquid phase synthesis of magnesium carbonate trihydrate, the effects of reaction time and microwave irradiation energy on the experimental results were considered. When the reaction time is too long and the microwave irradiation energy is too high, the rod-like crystal structure collapses and the crystal phase changes from magnesium carbonate trihydrate to basic magnesium carbonate tetrahydrate. In this paper, the morphology regulation and synthesis mechanism of radial magnesium carbonate crystal and microwave-assisted rod magnesium carbonate crystal are revealed by comparison of experimental phenomena. The main innovation of this paper is: preparation of radial magnesium carbonate trihydrate. It is the first time in the field of preparation of magnesium carbonate trihydrate, the effect of microwave field on crystal crystal growth is studied, and there are few reports in the field of preparation of magnesium carbonate trihydrate. In this paper, the reaction mechanism is also studied, and its formation mechanism is revealed, especially the magnesium ammonium complex ion and its role in the synthesis of radial magnesium carbonate crystals.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ132.2;O76

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王麗;孫寶昌;周海軍;陳建銘;陳建峰;邵磊;;超重力法制備三水碳酸鎂晶須[J];北京化工大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年02期

2 Wan-zhong Yin;Yu-lian Wang;Qiang-dong Ji;Jin Yao;Ying Hou;Lei Wang;Wen-xing Zhong;;Synthesis and formation mechanism of micro/nano flower-like MgCO_3·5H_2O[J];International Journal of Minerals Metallurgy and Materials;2014年03期

3 閆平科;薛國(guó)梁;高玉娟;王來(lái)貴;田海山;盧智強(qiáng);;碳酸鎂晶須演變過(guò)程研究(Ⅰ)[J];硅酸鹽通報(bào);2014年01期

4 閆平科;薛國(guó)梁;高玉娟;王來(lái)貴;田海山;盧智強(qiáng);;液相微波法合成三水碳酸鎂晶須的研究[J];硅酸鹽通報(bào);2013年07期

5 閆平科;田海山;高玉娟;王斌;馬正先;梁帥;;高長(zhǎng)徑比三水碳酸鎂晶須的合成研究[J];人工晶體學(xué)報(bào);2012年01期

6 鮮海洋;姜延鵬;彭同江;朱存金;鐘俊;吳勝;唐靖勇;;以溫石棉尾礦為鎂源制備堿式碳酸鎂晶須[J];非金屬礦;2011年05期

7 閆平科;王斌;高玉娟;田海山;;微米級(jí)三水碳酸鎂晶須的合成研究[J];中國(guó)非金屬礦工業(yè)導(dǎo)刊;2011年03期

8 陳敏;李月圓;王健東;陳慶武;崔虹旭;申瑩瑩;;利用菱鎂礦制備碳酸鎂晶須[J];硅酸鹽學(xué)報(bào);2009年10期

9 閆平科;馬正先;高玉娟;;碳酸鎂晶須的研究進(jìn)展概述[J];中國(guó)非金屬礦工業(yè)導(dǎo)刊;2009年03期

10 邵平平;李志寶;密建國(guó);;碳酸鎂水合物在283～363K范圍內(nèi)的晶體組成及晶型[J];過(guò)程工程學(xué)報(bào);2009年03期

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