陕西科技大学学报（自然科学版）
陝西科技大學學報（自然科學版）
협서과기대학학보（자연과학판）
Journal of Shaanxi University of Science and Technology (Natural Science Edition)
2015年
6期
53-56
,共4页
Bi4 Si3 O12粉体%熔盐法%工艺参数
Bi4 Si3 O12粉體%鎔鹽法%工藝參數
Bi4 Si3 O12분체%용염법%공예삼수
Bi4 Si3 O12 powders%molten salt method%process parameters
利用熔盐法制备了纯相Bi4 Si3 O12粉体，研究了工艺参数（如煅烧温度和盐含量）对熔盐法制备Bi4 Si3 O12粉体的影响．通过XRD测试分析及后续实验简单化，得出最佳的煅烧温度和盐含量为850℃和40 w t％．同时借助于紫外可见光谱，测试最佳工艺条件下制得样品的吸光度，从而计算出禁带宽度为2．44 ev ．通过荧光光谱分析可知，所得Bi4 Si3 O12粉体的最大激发波长和最大发射波长分别位于270 nm和462 nm ，相对于Bi4 Si3 O12单晶，激发光谱和发射光谱都发生了蓝移．同时分析了Bi4 Si3 O12粉体的形貌与Bi2 O3和SiO2粉体的形貌相似性，从而推断出合成机理为溶解‐沉淀机理．
利用鎔鹽法製備瞭純相Bi4 Si3 O12粉體，研究瞭工藝參數（如煅燒溫度和鹽含量）對鎔鹽法製備Bi4 Si3 O12粉體的影響．通過XRD測試分析及後續實驗簡單化，得齣最佳的煅燒溫度和鹽含量為850℃和40 w t％．同時藉助于紫外可見光譜，測試最佳工藝條件下製得樣品的吸光度，從而計算齣禁帶寬度為2．44 ev ．通過熒光光譜分析可知，所得Bi4 Si3 O12粉體的最大激髮波長和最大髮射波長分彆位于270 nm和462 nm ，相對于Bi4 Si3 O12單晶，激髮光譜和髮射光譜都髮生瞭藍移．同時分析瞭Bi4 Si3 O12粉體的形貌與Bi2 O3和SiO2粉體的形貌相似性，從而推斷齣閤成機理為溶解‐沉澱機理．
이용용염법제비료순상Bi4 Si3 O12분체，연구료공예삼수（여단소온도화염함량）대용염법제비Bi4 Si3 O12분체적영향．통과XRD측시분석급후속실험간단화，득출최가적단소온도화염함량위850℃화40 w t％．동시차조우자외가견광보，측시최가공예조건하제득양품적흡광도，종이계산출금대관도위2．44 ev ．통과형광광보분석가지，소득Bi4 Si3 O12분체적최대격발파장화최대발사파장분별위우270 nm화462 nm ，상대우Bi4 Si3 O12단정，격발광보화발사광보도발생료람이．동시분석료Bi4 Si3 O12분체적형모여Bi2 O3화SiO2분체적형모상사성，종이추단출합성궤리위용해‐침정궤리．
The pure phase Bi4 Si3 O12 powders were prepared by molten salt method .This paper studied effects of process parameters on Bi4 Si3 O12 pow ders synthesized by molten salt meth‐od .Through XRD analysis and simplification of subsequent experiments ,it is concluded that the optimal sintering temperature and salt content are 850 ℃ and 40 w t% .At the same time , by UV‐Vis spectra the absorbance of sample obtained optimum technological conditions was tested and the width of band gap is calculated as 2 .44 ev .By means of fluorescence spectrum analysis ,maximum excitation wavelength and emission wavelength for Bi4Si3O12 powders separately lie at 270 nm and 462 nm .Relative to the Bi4 Si3 O12 single crystal ,excitation spec‐trum and emission spectrum appeared blue shift .Simultaneously similarity of Bi4 Si3 O12 pow‐ders morphology and the morphology of Bi2 O3 and SiO2 powders are analyzed ,and synthesis mechanism of Bi4 Si3 O12 pow ders it is confirmed as dissolving precipitation mechanism .
