Effect of Fe_(2)O_(3)on the Structure,Physical Properties and Crystallization of CaO-Al_(2)O_(3)-SiO_(2)Glass

The calcium aluminosilicate-based glasses(CaO-Al_(2)O_(3)-SiO_(2),CAS)with different Fe_(2)O_(3)content(0.10wt%,0.50wt%,0.90wt%,and 1.30wt%)were prepared by traditional melt-quenching method.The glass network structure,thermal and mechanical properties,and crystallization behavior changes were investigated by nuclear magnetic resonance spectrometer,Fourier-transform infrared spectro-photometer,X-ray diffractometer,differential scanning calorimetry and field emission scanning electron microscope measurements.The change of Q^(n)in glass structures reveals the glass network connectivity decreases due to the increasing content of Fe_(2)O_(3)addition,resulting in the increasing of non-bridging number in glass structure.The glass densities slightly rise from 2.644 to 2.681 g/cm^(3),while Vickers’s hardness increases at first,from 6.469 to 6.901 GPa,then slightly drops to 6.745 GPa,with Fe_(2)O_(3)content increase.There is almost no thermal expansion coefficient change from different Fe_(2)O_(3)content.The glass transmittance in visible range gradually decreases with higher Fe_(2)O_(3)content,resulting from the strong absorption of Fe^(2+)and Fe^(3+)ions.The calculated activation energy from thermal analysis results first decreases from 282.70 to 231.18 kJ/mol,and then increases to 244.02 kJ/mol,with the Fe_(2)O_(3)content increasing from 0.10wt%to 1.30wt%.Meanwhile,the maximum Avrami constant of 2.33 means the CAS glasses exhibit two-dimensional crystallization.All of the CAS glass-ceramics samples contain main crystal phase of anorthite,the microstructure appears lamellar and columnar crystals.

Effects of sintering atmosphere on the physical and mechanical properties of modified BOF slag glass

This study proposes an efficient way to utilize all the chemical components of the basic oxygen fttrnace （BOF） slag to prepare high value-added glass-ceramics. A molten modified BOF slag was converted from the melting BOF slag by reducing it and separating out iron component in it, and the modified BOF slag was then quenched in water to form glasses with different basicities. The glasses were subsequently sintered in the temperature range of 600-1000℃ in air or nitrogen atmosphere for 1 h. The effects of different atmospheres on the physical and mechanical properties of sintered samples were studied by using differential scanning calorimetry （DSC）, X-ray diffraction （XRD） and scanning electron microscopy （SEM） and by conducting experiment on evaluating the sintering shrinkage, water absorption and bulk density. It is found that the kinetics of the sintering process is significantly affected by sintering atmosphere. In particular, compared with sintering in air atmosphere, sintering in N2 atmosphere promotes the synergistic growth of pyroxene and melilite crystalline phases, which can contribute to better mechanical properties and denser microstructure.

Optical Band Gap, Oxidation Polarizability, Optical Basicity and Electronegativity Measurements of Silicate Glasses Using Ellipsometer and Abbe Refractometer

The values of refractive index (n) for silicate glasses (silica, soda lime and borosilicate 7059) are decreased from 1.5119 to 1.5111, 1.5086 to 1.5065 and 1.5296 to 1.5281, respectively;and the optical band gap (Eg) is increased from 9.8 to 9.81 eV, 9.845 to 9.88 eV and 9.56 to 9.58 eV, respectively over the temperature range 295 - 473 K using ellipsometer at wavelength 632.8 nm. While n is decreased from 1.5276 to 1.5274, 1.5074 to 1.5070 and from 1.5283 to 1.5281, respectively;and Eg is increased from 9.59 to 9.592 eV, 9.862 to 9.870 eV, and 9.574 to 9.58 eV, respectively over the temperature range 297 - 322 K using Abbe refractometer at wavelength 589.3 nm. The values of oxide ion polarizability [αo2- (n) and αo2-(Eg)] regarding silica, soda lime and borosilicate 7059 glasses are decreased from 1.3427 to 1.3408, 1.6014 to 1.5941, 1.4329 to 1.4193, respectively over the temperature range 295 - 473 K using ellipsometer;and are decreased from 1.3786 to 1.3764, 1.5991 to 1.5969, 1.4297 to 1.4191, respectively over the temperature range 297 - 322 K using Abbe refractometer. Similarly, the values of optical basicity [A (n) and A (Eg)] of silica, soda lime, and borosilicate 7059 glasses are decreased from 0.4272 to 0.4245, 0.6271 to 0.6224, 0.5045 to 0.4933, respectively over the temperature range 295 - 473 K using ellipsometer;and are decreased from 0.4586 to 0.4567, 0.6256 to 0.6242, 0.5018 to 0.4930, respectively over the temperature range 297 - 322 K using Abbe refractometer. Further, we have found that for silica, soda lime and borosilicate 7059, the values of electronegativity (ξ1av) QUOTE ζ1av) using Zahidnumerical model [based on αO2- (n) and A (n)] are increased from 5.1035 to 5.5504, 4.0393 to 4.830, 4.8143 to 5.0111, respectively over the temperature range 295 - 473 K using ellipsometer;while these values are increased from 5.0657 to 5.2149, 5.0657 to 5.2149, 4.8357 to 5.0111, respectively over the temperature range 297 - 322 K using Abbe refractometer. It is very clear from this research report that both refractive index and optical band gap-based-oxide ion polarizability and optical basicity have the same decreasing trend as the temperature is increased, and this trend indicates that the reported glasses have a very small amount of electronic polarizability. Moreover, this decreasing trend occurs due to the decreasing amount of non-bridging oxygen (NBO) which in turn caused a decrease in refractive index within the silicate glass system at higher temperature. Since the calculated values of electronegativity are found to be in the range 4.0393 - 5.5504 for the reported silicate glasses, so all these glasses have an ionic character. Moreover, low values of optical basicity and of oxide ion polarizability suggest that the silicate glasses are not novel glasses (optical functional glasses) for non-linear optical (NLO) devices or for three dimensional displays.

Influence of the Colorless Waste Glass on the Mineralogical, Microstructural and Mechanical Properties of Clay Material from Wack (Adamawa, Cameroon)

This study reports the investigation of the influence of adding waste glass on the properties of fired clay specimen. Four different particle sizes (smaller than 100 μm, 300μm, 500μm, and 800 μm) of waste glass were mixed with a clay material at contents of 0%, 2%, 6% and 10% per weight. Specimen samples were fired at 750℃ in an electrical furnace for 6 hours, at a heating rate of 5℃/min. The physical and mechanical properties of terracotta are studied. The chemical analysis revealed that the clays were dominated by kaolinite and montmorillonite with small proportion of mixed layers clay. The fine grained texture (0.002 mm > 25%) and high plasticity (WP > 30%) of the clays were responsible for the moderate and high values of shrinkage upon oven drying and firing. The firing color variation from reddish brown shade was due to the amounts of iron and titanium oxides present in the obtained material. The water absorption was varied between 17.40% and 13.70%, while the linear shrinkage was estimated to be between 0.70% and 1.20% and the flexural strength from 5.30 to 8.10 MPa. These results showed that mixing clay with waste glass at 750℃ is an interesting approach to obtain reddish brown ceramics destined for bricks or roofing tiles.

Effect of SrO on the Structure of Apatite and Wollastonite Phases of Na₂O-CaO-SiO₂-P₂O₅Glass System

Glasses in the system 24.5Na2O·24.5CaO·6P2O5·xSrO·(45-x)SiO2 have been studied in the composition region of x = 0 - 15 mol%. The as prepared glasses are transparent and have an amorphous network structure. On the otherhand, heat treated glasses are transformed to opaque white glass ceramic characterized by their highly crystalline network structure. Crystalline apatite (calcium phosphate, Ca3(PO4)2, wollastonite (calcium silicate, CaSiO3), and strontium calcium phosphate Ca2Sr(PO4)2 are the main well-formed crystalline species played the major role in material bioactivity. Increasing SrO leads to enhancing material crystallite and enhances the hardness of the host glass matrix. The change of XRD spectra, 31P NMR chemical shift and hardness number upon increasing SrO are considered due to modification of the apatit Ca(PO3)2 to involve Sr ions inducing Ca2Sr (PO4)2 apatite one. Such species play the role in enhancing material properties and hardness.

聚碳酸酯玻璃材料加工物理与技术的研究概况

本文主要从加工物理与加工技术两个方面对聚碳酸酯(PC)玻璃的研究进行综述。总结了当前对PC微观结构的认识,以及温度场、压力场、剪切场和拉伸力场这4种加工外场对PC微观结构的影响;介绍了PC注塑加工、注射压缩加工、挤出加工和拉伸加工等具有工业化前景加工技术,并介绍了加工工艺参数对PC性能的影响关系。并对PC加工未来的发展方向进行了展望,以期为PC玻璃的高性能化加工提供一定的指导。

Research on thermal insulation materials properties under HTHP conditions for deep oil and gas reservoir rock ITP-Coring

Deep oil and gas reservoirs are under high-temperature conditions,but traditional coring methods do not consider temperature-preserved measures and ignore the influence of temperature on rock porosity and permeability,resulting in distorted resource assessments.The development of in situ temperaturepreserved coring(ITP-Coring)technology for deep reservoir rock is urgent,and thermal insulation materials are key.Therefore,hollow glass microsphere/epoxy resin thermal insulation materials(HGM/EP materials)were proposed as thermal insulation materials.The materials properties under coupled hightemperature and high-pressure(HTHP)conditions were tested.The results indicated that high pressures led to HGM destruction and that the materials water absorption significantly increased;additionally,increasing temperature accelerated the process.High temperatures directly caused the thermal conductivity of the materials to increase;additionally,the thermal conduction and convection of water caused by high pressures led to an exponential increase in the thermal conductivity.High temperatures weakened the matrix,and high pressures destroyed the HGM,which resulted in a decrease in the tensile mechanical properties of the materials.The materials entered the high elastic state at 150℃,and the mechanical properties were weakened more obviously,while the pressure led to a significant effect when the water absorption was above 10%.Meanwhile,the tensile strength/strain were 13.62 MPa/1.3%and 6.09 MPa/0.86%at 100℃ and 100 MPa,respectively,which meet the application requirements of the self-designed coring device.Finally,K46-f40 and K46-f50 HGM/EP materials were proven to be suitable for ITP-Coring under coupled conditions below 100℃ and 100 MPa.To further improve the materials properties,the interface layer and EP matrix should be optimized.The results can provide references for the optimization and engineering application of materials and thus technical support for deep oil and gas resource development.

空心玻璃微珠-聚丙烯复合材料的制备及力学物理性能

以空心玻璃微珠(HGB)为填料通过熔融共混法制备空心玻璃微珠/聚丙烯(PP)复合材料,使用马来酸酐接枝聚丙烯(MA-g-PP)作为相容剂,并对HGB进行表面改性处理,研究了空心玻璃微珠表面处理和含量对复合材料力学物理性能的影响。结果表明,经表面改性的HGB与PP基体的界面结合力强、HGB分布均匀;随空心玻璃微珠体积分数的增加,复合材料的拉伸强度、弯曲强度和缺口冲击强度都表现为先上升后下降的趋势;复合材料的密度逐渐下降。当空心玻璃微珠的体积分数为12%时,复合材料综合性能较好。

玻纤含量对汽车用玻纤增强尼龙复合材料性能的影响

为了研究玻璃纤维(GF)含量对玻璃纤维增强尼龙66(PA66)复合材料(GF/PA66)的物理机械性能、耐热性、常温和低温状态下的冲击性能的影响,采用同向双螺杆挤出和注塑成型工艺制备了不同含量的GF/PA66复合材料,通过灰分、力学性能测试、热变形温度测试等手段对GF/PA66复合材料进行考察。研究结果表明:在试验范围内,GF/PA66复合材料的物理机械性能随着GF含量的增加改善明显,当GF在复合材料中添加的比例为50%时,相比于纯PA66树脂材料,GF/PA66复合材料的拉伸强度、弯曲模量、弯曲强度和冲击强度性能都提高显著,分别提高了229%,445%,227%和338%;当GF质量含量达到25%时,GF/PA66复合材料的热变形温度高达240℃,相比于纯PA66树脂材料,热变形温度提高了269%。本研究为GF/PA66复合材料作为工程塑料,在汽车发动机进气管、中冷管、罩盖以及汽车转向系统传感器罩盖、底盘系统用壳体等相关零部件领域实现广泛应用,提供了重要的数据支持。

放电等离子烧结工艺对制备硅灰石微晶玻璃的影响

以水淬玻璃料为原料,采用放电等离子烧结技术制备了单一晶相的硅灰石微晶玻璃,利用X射线衍射仪、扫描电子显微镜和维氏硬度计等测试手段,研究了烧结温度、烧结压力对微晶玻璃的物相组成、微观结构和性能的影响。研究结果表明,烧结温度的升高,有利于微晶玻璃析晶,微晶玻璃的结晶度、体积密度、硬度增大,吸水率减小。烧结压力的增大会抑制微晶玻璃晶粒的长大,降低其结晶度,同时也有利于排除孔隙,增大体积密度、硬度,减小吸水率。烧结温度为900℃、烧结压力为20 MPa时制备出性能最佳的微晶玻璃,其结晶度、体积密度、吸水率、硬度分别为60.60%、2.96 g/cm3、0.009%、614 HV。

探究浸润剂对无碱玻璃纤维性能的影响及解决对策

本文深入探讨浸润剂在增强无碱玻璃纤维性能方面的关键作用,通过详细分析浸润剂对纤维的物理强度、化学稳定性和热性能的影响,旨在阐明科学选择和优化浸润剂的方法。本文涵盖了不同浸润剂的性质,并为它们在工业生产中的应用提供了明确的指导原则,此外还关注于配方的改进和生产过程的调整,目标是提升无碱玻璃纤维的整体性能,并同时考虑环境的影响,以促进可持续发展。通过这一综合性分析,本文为无碱玻璃纤维的发展提供了全面的理论和实践指导。

纤维直径对玻璃纤维直接纱物理性能的影响

研究了不同纤维直径对玻璃纤维直接纱的主要物理性能的影响,并通过光学显微镜对玻璃纤维形貌进行研究。结果表明,纤维直径的大小直接影响到玻璃纤维产品的物理性能,且为关键影响因素,其中与纱线断裂强度、毛羽和膨化率呈负相关性,与纱线耐热性和纱线在树脂中的浸透速度呈正相关性。

基于玻璃白酒瓶理化性能指标的检测

玻璃酒瓶质量涉及人们的健康和安全,其性能检测越来越受到生产企业和检测机构的重视。玻璃白酒瓶的检测项目主要包括理化性能、规格尺寸和外观质量等,其中理化性能检测最为重要。基于玻璃白酒瓶理化性能指标的要求,重点阐述玻璃理化性能的检测方法,分析玻璃白酒瓶理化性能测试的重要性。

聚二甲基硅氧烷膜对中硼硅玻璃管制注射剂瓶质量特性的影响研究

目的:研究镀聚二甲基硅氧烷膜后对中硼硅玻璃管制注射剂瓶质量特性和质控方法操作的影响,包括外观、鉴别、物理性能、内表面耐水性和元素浸出量的影响。方法:采用3家企业的9批镀膜中硼硅玻璃管制注射剂瓶和对应的中硼硅玻璃管制注射剂瓶,评估聚二甲基硅氧烷膜后中硼硅玻璃管制注射剂瓶质量控制方法是否需要进行针对性修改,以及评估评估镀膜对瓶质量特性的影响。结果:镀膜对中硼硅玻璃管制注射剂瓶的外观、鉴别、物理性能没有影响,镀膜过程并不会损害中硼硅玻璃管制注射剂瓶的原有性能,也不会导致检验方法出现需要特别关注的注意事项;镀膜后的中硼硅玻璃管制注射剂瓶在内表面耐水性方面有所改善。镀膜前后砷、锑、铅、镉等有害元素的浸出量均低,说明镀膜过程并未增加这些有害元素的浸出风险。通过ICP-OES测定元素浸出量,多数金属元素也未发现明显变化。结论:镀聚二甲基硅氧烷膜后中硼硅玻璃管制注射剂瓶的外观、鉴别、物理性能和元素浸出量质控方法操作不需要做针对性改变,镀膜后内表面耐水性有改善,对其他质量特性项目没有显著不利影响。

粉煤灰空心微珠性能的测试研究

从粉煤灰中提取了空心微珠 (HGB) ,并按粒度进行了分类。对不同尺寸的空心微珠的密度、壁厚及pH值等物理性能进行了测量 ;实验结果表明 :75～ 10 0 μm的空心微珠密度最大、微珠的壁厚与粒径比值最大、抗压强度最高。选取这一粒度范围的空心微珠制备了涂料。对其进行隔热性能研究 ,证明具有良好的隔热效果 ,说明这一粒度范围空心微珠适合用作隔热材料的填料。

地聚物胶凝材料性能与聚合机理的研究

地聚物胶凝材料作为一种新型水泥,具有早期性能好、体积稳定性好、耐久性好等优良性能,是一种"绿色环保"水泥。本文研究了胶凝材料的性能随水玻璃模数、煅烧温度、碱含量变化的规律,采用X射线、扫描电镜等对该胶凝材料的聚合产物的种类、形貌等进行了分析,探讨了地聚物胶凝材料的聚合机理。

GRC模板的物理力学性能试验研究

为了研究GRC模板的物理力学性能,通过正交试验和理论计算分析,对影响GRC模板的抗折强度、抗冻性能、干缩湿胀性能、含(吸)水率、容重等的诸多因素及其水平进行了优选,给出了各影响因素的显著性顺序,研究了各项性能指标随诸因素水平的变化规律.根据各项性能及其影响因素的重要性程度,以及各因素取值水平差异对性能的影响程度,通过综合平衡分析,从中优选出了各项性能指标都较好的材料配比组合,并对相应的各项性能指标进行了理论计算.研究成果表明,用综合平衡后优选出的因素水平组合制成的GRC平板,其各项性能都更适合用作建筑施工模板.

OH基对磷酸盐激光玻璃激光性能和物理性质的影响

研究了ＯＨ基对ＨＬＣ＿５型（Ｒ２Ｏ－ＢａＯ－Ａｌ２Ｏ３－Ｐ２Ｏ５）和Ｎ２１型（ＢａＯ－Ａｌ２Ｏ３－Ｐ２Ｏ５）磷酸盐激光玻璃激光性能和物理性质的影响．结果表明：随着ＯＨ基含量的降低，玻璃的荧光寿命延长，量子效率增大，转变温度、软化温度、抗折强度和折射率升高，而热膨胀系数和平均色散下降，密度略有下降．用ＯＨ基与激活离子的相互作用和ＯＨ基对玻璃结构的影响的有关理论对上述结果进行了解释．

碱金属氧化物对镍渣微晶玻璃性能的影响

以镍渣及粉煤灰为主要原料制备R2O-MgO-Al2O3-SiO2系微晶玻璃,通过加入不同种类及质量分数的碱金属氧化物,探讨碱金属氧化物对微晶玻璃理化性能的影响.结果表明:利用镍渣制备的微晶玻璃致密且性能良好;加入Li2O、Na2O使得微晶玻璃物理性能随碱金属氧化物质量分数的增大而提高,当Na2O质量分数为10%、Li2O质量分数为2%时,其抗折强度可达138.34 MPa.微晶玻璃耐酸性与耐碱性则随碱金属氧化物质量分数的增大而降低.