Na2O-SiO2-ZrO2-TiO2系统玻璃耐碱机理的研究

本文采用了分光光度法、原子吸收光谱法及电子探针(EPMA)等手段，对Na2O-SiO2-ZrO2-TiO2系统玻璃进行了耐碱机理的初步探讨。用相关分析对碱蚀液中ZrO2、TiO2、SiO2等氧化物的碱溶出行为及各氧化物在玻纤表面上的残留行为进行了讨论．     

Na_2O-SiO_2-ZrO_2-TiO_2系统玻璃耐碱机理的研究

本文采用了分光光度法、原子吸收光谱法及电子探针(EPMA)等手段,对Na_2O-SiO_2-ZrO_2-TiO_2系统玻璃进行了耐碱机理的初步探讨。用相关分析对碱蚀液中ZrO_2、TiO_2、SiO_2等氧化物的碱溶出行为及各氧化物在玻纤表面上的残留行为进行了讨论。     

Thermodynamic study of K_2CrO_4-KAlO_2-KOH-H_2O and Na_2CrO_4-NaAlO_2-NaOH-H_2O systems

Phase diagrams of complex multi-component aqueous chromium salt system are the important theoretical bases for increasing the recovery ratio of chromium and reducing the poisonous waste in the chromate production process. Phase equilibrium of multi-component system has been calculated from the limited known data with thermodynamic models. The phase equilibriums of KOH-K2CrO4-H2O, KOH-KAlO2-H2O, NaOH-Na2CrO4-H2O and NaOH-NaAlO2-H2O systems were calculated with thermodynamic models. The solubilities of Cr and Al was measured in the systems at different temperatures. The results were compared with experimental data and they are consistent with each other. It shows that the lower concentration of KOH (or NaOH) is favorable for the crystallization of KAlO2 (or NaAlO2) and higher concentration of KOH (or NaOH) is favorable for the crystallization of K2CrO4 (Na2CrO4). Therefore, K2CrO4 (or Na2CrO4) can be separated from KAlO2 (or NaAlO2) with controlling the KOH concentration in solutions of KOH-K2CrO4-KAlO2-H2     

H2O2-Fe2+/TiO2-H2SO4体系处理废有机溶剂的研究

研究了废有机溶剂TBP/OK在H2O2-Fe2 /TiO2-H2SO4体系中的氧化分解行为,分析了H2O2用量、催化剂、温度、pH值对反应进程及结果的影响.在此基础上进行的"热"实验表明,废有机溶剂氧化分解所含放射性核素主要富集在反应残液中,基本没有二次转移或扩散.     

Al2O3-SiO2-ZrO2-TiO2复合溶胶的制备工艺

以Al(NO3)3.9H2O、Si(OC2H5)4、ZrOCl2.8H2O和Ti(OC4H9)4为原料,用sol-gel法通过分步水解得到透明稳定性能好的复合溶胶,并采用XRD和SEM等测试技术对复合溶胶的相组成及其微观形貌进行了表征。实验发现:ZrOCl2.8H2O的预水解溶液的pH<1,用它作为胶溶剂可合成性能好的复合溶胶;若不加硅烷偶联剂,当Al、Si物质的量比n(Al)∶n(Si)<2∶1时,得不到性能稳定的复合溶胶;改变Ti组分的加入量,复合薄膜的主晶相将发生改变。     

关于不定方程组x^2-2y^2=1,y^2-54z^2=4

运用了一种初等的方法,证明了当D=54时,不定方程组x^2-2y^2=1,y^2-Dz^2=4有整数解（x,y,z）=（±3,±2,0）。     

Fe~(2+)催化H_2O_2/Na_2S_2O_8氧化降解水中黄腐酸

利用Fe~(2+)催化H_2O_2或Na_2S_2O_8降解水中的黄腐酸,研究了诸因素(处理剂加量、pH和温度)对黄腐酸降解的影响。黄腐酸溶液颜色和TOC的去除,紫外区光吸收强度的降低都表明H_2O_2/Fe~(2+)体系对黄腐酸具有良好的降解效果;在pH=3.0、H_2O_2为400mg·L~(-1)、H_2O_2与Fe~(2+)物质的量的比为10∶1的条件下,处理100mg·L~(-1)黄腐酸溶液120 min,TOC去除率达到88.4%。Na_2S_2O_8/Fe~(2+)降解结果表明:在pH=3.0、Na_2S_2O_8为2 000mg·L~(-1),Fe~(2+)为5mmol·L~(-1),温度为50℃条件下处理100 mg·L~(-1)黄腐酸水样240min,TOC去除率为55.9%。分析降解效果和试剂成本可知,H_2O_2/Fe~(2+)法降解水中黄腐酸优于Na_2S_2O_8/Fe~(2+)法。     

关于Diophantine方程x^2＋2y^2=z^n

讨论了Diophantine方程x^2＋2y^2=z^n在xy≠0,（x,y）=1时有解的充分必要条件及用代数教论的方法给出（x,y）=1,n≥2时方程整数解的一般公式。     

用DFT和MP2方法研究原子簇NiB2，Ni2B2，Ni3B2，Ni4B2

为了考察不同方法、不同基函数对计算结果的影响,选择了原子簇NiB2,Ni2B2,Ni3B2,Ni4B2模型,用DFT(Lanl1dz,Lanl2dz)和MP2(Lanl1dz,Lanl2dz)方法对其进行高水平的量子化学计算．结果表明：DFT方法和MP2方法的定性结果一致,计算结果存在一定差别,基函数对MP2方法的结果影响较小．     

H2O2／ClO2法制备低聚壳聚糖

研究了壳聚糖在H2O2/ClO2溶液中非均相体系下的微波辐射降解,通过正交试验得到了最优化反应条件: H2O2 3.0 wt%,ClO2 1.5 wt%,微波辐射功率320 W,辐射时间45 min,所得水溶性壳聚糖数均相对分子质量为2.05×103,收率可达82.0 %.UV、红外图谱分析表明,辐照后壳聚糖分子链链长变短,壳聚糖主链结构未发生变化.     

烧结法建筑装饰微晶玻璃冲蚀磨损研究

利用冲蚀磨损实验研究了影响CaO-Al2O3-SiO2系统烧结法微晶玻璃装饰板材冲蚀行为，通过正交实验，讨论了磨粒种类、冲蚀角、冲蚀时间，磨粒粒径等因素对CaO-Al2O3-SiO2系统微晶玻璃的冲蚀性的影响。     

Na_2O对微晶玻璃装饰板烧结和析晶的影响

研究了Na_2O含量对CaO-Al_2O_3-SiO_2系统微晶玻璃装饰板析晶温度、析晶相,烧结收缩及表面气泡的影响。确定了合适的Na_2O含量及烧结温度范围。     

CaO-Al_2O_3-SiO_2系统微晶玻璃的振动光谱研究

通过红外光谱及拉曼光谱,研究了CaO－Al2O3－SiO2系统微晶玻璃的微观结构．系统分析TCaO、Al2O3、B2O3取代SiO2后成分变化对微晶玻璃结构的影响．从振动光谱研究及理论分析两个角度讨论了Al3 、B3 的配位状态变化,并得到一致结论。     

Effect of Al2O3 Content on Residual Stress and Properties of CAS Glass-ceramics

The structure and properties of the glass-ceramics were tested with X-ray diffraction testing instrument,correlative software,and other modern testing means.Then the effect of Al2O3 content on internal stresses in CaO-Al2O3-SiO2 glass-ceramics was studied deeply.In order to study the relationship of Al2O3 to the residual stress of CaO-Al2O3-SiO2 glass-ceramics,X-ray diffraction"sin2 ψ"was used.The means utilized the x radial incidence produced from cathode radial tube,and took the space between crystals as measurement of strain.When the stresses produced,the space between crystals changed and the diffraction peak moved during Bragg diffraction.The magnitude of movement is related to the stresses.The experimental results show the residual stress is considerably high and Al2O3 can influence the mechanical properties of this material hugely.     

氧化铝对微晶玻璃装饰板烧结及晶化影响

研究了Al2O3含量的变化对CaO-Al2O3－SiO2系统微晶玻璃的烧结和析晶的影响规律。结合工业化生产,确定了合适的Al2O3含量范围。     

热处理对CaO-Al2O3-SiO2系微晶玻璃性能影响

以CaO-A l2O3-SiO2为主要原料,采用烧结法制备出微晶玻璃.利用DSC确定了核化温度和晶化温度.利用XRD和SEM研究微晶玻璃的物相组成和显微结构.通过研究热处理温度对微晶玻璃性能的影响,可得出在780℃核化1h、948℃晶化2h时,微晶玻璃的性能最好.     

Stress Analysis of CaO-Al_2O_3-SiO_2 System Glass-ceramic with Different Thickness

1Introduction Themaincrystallinephaseofarchitecturaldecoratedglass ceramicisβwollastonite.WiththedevelopmentofCASglass ceramicindustry,therearesomeintractableproblemsintheindustryprocess,suchastransmogrifica tionorburst.Theemergenceoftheseproblemscandeep…     

RESEARCH ON FACTORS AFFECTING THE COLOURATION OF RED GLASS-CERAMICS

In this pater,effect of alkali oxide, zinc ox-ide and colorants such as cadmiun sulfide and selenium pow-der on the colouration of the red glass-ceramic materials inthe CaO-Al_2O-3-SiO_2 system has been studied. The relevantlaws have been presented and analysed.     

INFLUENCE OF ZnO AND BaO CONTENTS ON SINTERING AND CRYSTALLIZATION OF GLASSCERAMIC DECORATIVE MATERIALS

In this paper,the influence of ZnO and BaOcontents on sintering and crystallization of decorative materi-al in the system of CaO-Al_2O_3-SiO_2 was studied. The opti-mum ZnO, BaO contents and sintering or crystallization tem-perature for the glass-ceramic were determined.     

琥珀色微晶玻璃装饰板材的研制

研究了着色剂舍量对CaO－Al2O3－SiO2系统微晶玻璃装饰板材颜色的影响。采用样温炉和高温粘度计确定合理的核化温度，晶化温度。并通过X衍射等手段分析其主晶相。