CAJ | 학술논문

以硅溶胶、硝酸钙为原料，尿素为燃料，采用燃烧法制备纳米硅酸三钙。研究了化学计量比、引燃温度对合成产物中游离氧化钙含量的影响。用乙二醇法测定产物中游离氧化钙的含量，X射线衍射仪、场发射扫描电镜、Zeta电位及纳米粒度分析仪和微量热仪表征合成样品的物相、微观形貌、粒度分布和水化热。结果表明：化学计量比为0．24，引燃温度为700℃时，合成产物中游离氧化钙含量达到最低值2．0％；合成的纳米硅酸三钙颗粒为不同结晶程度且呈现多种形貌的颗粒，平均粒度为225．9 nm；合成的纳米硅酸三钙水化放热峰值出现的时间为69．2 s，峰值为2．4368 mw/g，比传统水泥具有较高的水化活性。
이규용효、초산개위원료，뇨소위연료，채용연소법제비납미규산삼개。연구료화학계량비、인연온도대합성산물중유리양화개함량적영향。용을이순법측정산물중유리양화개적함량，X사선연사의、장발사소묘전경、Zeta전위급납미립도분석의화미량열의표정합성양품적물상、미관형모、립도분포화수화열。결과표명：화학계량비위0．24，인연온도위700℃시，합성산물중유리양화개함량체도최저치2．0％；합성적납미규산삼개과립위불동결정정도차정현다충형모적과립，평균립도위225．9 nm；합성적납미규산삼개수화방열봉치출현적시간위69．2 s，봉치위2．4368 mw/g，비전통수니구유교고적수화활성。
Nano tricalcium silicate ( nano-C3 S) was synthesized by a combustion method with silica sol and calcium nitrate as raw materials ,urea as fuel .Effects of stoichiometric ratio and ignition temperature on the content of f-CaO in synthesized nano-C3 S were investigated .The content of f-CaO in synthesized samples was measured by glycol method .The phase composition ,microstructure ,particle size distribution and hydration heat of samples were charac-terized by X-ray diffractometer (XRD),Field emission scanning electron microscope (FSEM),Zeta potential/sub-micron size analyzer and Digital display calorimeter .The results show that the content of f-CaO in the sample rea-ches the least value about 2 .0% under the synthesized condition of stoichiometric ratio at 0 .24 and the ignition temperature at 700℃.The synthesized nano-C3 S particles show various morphology and diverse degree of crystalli-zation with an average particle ’ size of 225.9 nm.The synthesized nano-C3 S shows a higher hydration reactivity in comparision with traditional cement because the value of the heat evolution peak of the product is 2 .4368 mw/g at a hydration time of 69 .2 seconds .