花岗石研磨抛光表面及其光泽度研究

对采用游离磨料研磨抛光后的花岗石表面粗糙度和光泽度进行了测量，并观察花岗石在研磨过程中表面形貌的变化。实验结果表明，抛光后表面粗糙度值虽然很低，但并没有消除石材与生俱来的裂纹等缺陷，表面还残留大量粗加工造成的较大凹坑，限制了花岗石表面光泽度的进一步提高。     

人造金属石加工中岩石表面光泽形成过程研究

岩石只有经过抛光后才能显露出特有的图案和迷人的色彩与光泽。作为天然岩石材料加工的主要工具，树脂结合剂固结金刚石磨盘的加工机理和工艺研究尚不深入。通过跟踪不同粒度金刚石磨盘的加工过程，从表面粗糙度与光泽度的对应关系着手探讨岩石光译表面的形成过程。研究表明，随着金刚石磨粒粒度的减小，塑性流动变形在加工过程中起着越来越重要的作用，通过研究还发现对于一种花岗石，在三种不同的加工方式下对其磨抛时，花岗石表面的光泽度和粗糙度都有关较好的对应关系，而且对于不同的石材，基本上也具有相同的变化规律。     

人造金刚石加工中岩石表面光泽形成过程研究

岩石只有经过抛光后才能显露出特有的图案和迷人的色彩与光泽。作为天然岩石材料加工的主要工具 ,树脂结合剂固结金刚石磨盘的加工机理和工艺研究尚不深入。通过跟踪不同粒度金刚石磨盘的加工过程 ,从表面粗糙度与光泽度的对应关系着手探讨岩石光泽表面的形成过程。研究表明 ,随着金刚石磨粒粒度的减小 ,塑性流动变形在加工过程中起着越来越重要的作用。通过研究还发现对于一种花岗石 ,在三种不同的加工方式下对其磨抛时 ,花岗石表面的光泽度和粗糙度都有着较好的对应关系 ,而且对于不同的石材 ,基本上也具有相同的变化规律     

粘胶织物生物抛光的影响因素分析

以减量率、还原糖量以及起毛起球性作为评价指标,对比了棉织物和粘胶织物的生物抛光效果差异;研究了影响粘胶织物生物抛光效果的因素.结果表明,相同的整理条件对棉织物的抛光效果要优于对粘胶织物的抛光效果.粘胶纤维表面进行简单碱处理后,生物抛光效果有明显地提高;酶组分含量不同的纤维素酶对粘胶的生物抛光效果有较为明显的差异;酶作用...     

基于双平面研磨方法的圆柱滚子抛光实验研究

圆柱滚子的表面质量对轴承的性能、寿命有重要的影响。本文在双平面研磨机上结合绒布抛光垫对圆柱滚子表面进行了抛光。经过20 min时间的抛光,圆柱滚子表面质量得到了极大的改善,获得了镜面加工效果,并且圆柱滚子的圆度有了0.3μm的提高。实验结果表明了基于双平面研磨机上的圆柱滚子抛光实验可以略微改善工件圆度,有效地提高圆柱滚子表面质量。     

烤烟外观区域特征感官评价指标的筛选

初次提出了烤烟外观区域特征的概念,赋予了烤烟外观区域特征的内涵,筛选出烤烟外观区域特征指标,构建了烤烟外观区域特征指标感官评价方法.以初烤烟叶C3F等级样品为研究对象,进行了全国各生态区主要生产点烤烟外观区域特征实证分析,初步确定底色、蜡质感和光泽度3个指标作为烤烟外观区域特征的评价指标,叶面组织和柔韧性两个指标作为备选评价指标.     

和田玉油性定义的探讨

油性是评价和田玉品质的重要标准,和田玉"油性"的定义对和田玉评价体系的建立以及规范和田玉市场是意义重大的。本文采用问卷调查法、工厂加工验证、紫外-可见光谱仪、光泽度计、表面轮廓综合测试仪对和田玉的"油性"进行了系统的调查和实验验证。结果发现:(1)市场调查时,大多数被调查者认为"油性"涉及和田玉的油脂光泽、由内而外的油润感、细腻结构造成的弥散效应以及抛光。(2)抛光实验证明,同一块样品随着抛光程度的不同,所表现出来的油性也不同;结构粗细不同的样品即使抛光程度相同,表现出的"油性"也是不同的。(3)光泽度计、紫外-可见光谱和表面轮廓综合测试仪表明,抛光程度会影响和田玉表面的光泽度,反射率和粗糙度。最终,将和田玉的"油性"定义为和田玉细腻均匀的结构对光产生的一种弥散效应和当对其进行适当的抛光后,其表面的油脂光泽得以显现这两部分内容。     

毛/涤制服面料产生极光后的光泽度变化率研究

为了探究毛/涤制服类织物极光强弱的有效评价指标,通过主客观相结合的方式,采用色差仪、织物光泽度仪等对已有极光区域和非极光区域织物的光泽及明度变化进行测试。研究表明,同一织物的极光和非极光区域均存在较为明显的明度差异和光泽度差异,极光与非极光区域的平均光泽度变化率的变化规律与人眼主观评价具有一致性,可以定量评价织物极光强弱,而明度差异可以定性说明织物光泽变化,但是和主观评价不具有一致性;极光具有明显方向性,测试样品的极光区域经向光泽度均高于纬向,应使用极光最明显方向的光泽度变化率进行定量考核。     

GaN晶片的CMP加工工艺研究

研究了GaN晶片的化学机械抛光（CMP）工艺。分析了在CMP加工工艺过程中对GaN晶片表面质量所产生的影响。实验采用质量分数30％的H2O2溶液与铁经过Fenton化学反应20min后作为抛光液,并分别利用2种不同磨粒粒度W5和W0．5对晶片表面抛光,对不同工艺参数加工后的晶片表面进行测试分析,并推测加工过程中晶片表面可能发生的化学反应。图6表1参15     

纸机烘缸抛光器

纸机烘缸抛光器中国专利申请号95237273·8,本实用新型涉及一种造纸机械设备,主要是对纸机烘缸进行抛光的机械设备。在造纸生产过程中,影响纸和纸板表面平滑度,光泽度的主要设备在纸机的压榨部,烘干部,湿纸页通过压榨部后形成一定干度,纸页表面的平滑度、光泽度就取决于     

ELID磨削后石材的表面微观特性研究

用不同粒度金刚石砂轮及EL ID技术精密磨削两种典型的天然石材,跟踪观察天然石材在EL ID磨削过程中表面形貌变化、加工后的表面粗糙度以及表面光泽度,并通过扫描电子显微镜和三维表面构造分析仪分析加工后的石材表面。实验结果表明,利用超细粒度金刚石砂轮进行EL ID磨削可在石材主要矿物上获得粗糙度极低的光滑表面,但无法消除石材与生俱来的裂隙、晶界等缺陷,正是这些缺陷限制了表面光泽度的进一步提高。     

喷墨印刷中纸张性能对印品光泽度的影响研究

该实验采用喷墨打印方式,研究了纸张性能对印品光泽度的影响。研究发现：喷墨印刷中纸张涂层结构、成纸性能对印品光泽度均有很大的影响,具相关性较大。纸张性能对印品光泽度的影响按相关系数排列为：光泽度、定量、粗糙度、表面润湿性能。纸张光泽度、定量与印品光泽度正相关,纸张粗糙度、表面润湿性能与印品光泽度负相关,且纸张光泽度与印品光泽度高度相关。因此,要想得到光泽高的喷墨印品,必须根据用途选用合适的、涂层结构光滑紧密平整的纸张。     

Classification of bananas during ripening using peel roughness analysis—An application of atomic force microscopy to food process

To monitor banana surface (peel) roughness changes during ripening treatment, atomic force microscopy (AFM) as a novel and emerging technique was used in this study. The roughness of banana peel was studied using the arithmetic mean between peaks and troughs (R_a) and the root-mean-square roughness (R_q). It was concluded that with changing the ripening stages, the behavior of the roughness changes significantly. With advancing fruit ripening, the extending of the epicarp and the decrease of the surface (peel) roughness were found due to enlarging of fruit volume. The highest mean roughness was found to be at stage 1, R_a = 8.25 and R_q = 9.65 nm. Based on two-dimensional profile results, the surface (peel) roughness was affected strongly by studied different ripening stages. It was concluded that the peak values in the ripple profiles become smaller with advancing fruit ripening. However, the effects of noise in the profiles appeared to increase. So, in all the initial stages of banana fruit ripening, the noise was found to be minimal. Consequently, the AFM technique was found to be a promising tool for quantification of the peel roughness or glossiness and also could help in the quality control of banana fruit on the nanoscale.     

金刚石涂层拉丝模及其在焊丝生产中的应用

采用化学气相沉积法,在硬质合金拉丝模的工作区域制备金刚石涂层,利用扫描电镜、原子力显微镜、Ra-man光谱仪对涂层表面形貌、成分等进行分析,并将拉丝模应用于焊丝拉拔生产线中。结果表明:拉丝模涂层均匀、致密,抛光后的表面粗糙度可降低至10 nm以下,使用寿命较传统模具长,镀铜焊丝的表面粗糙度明显降低。     

Comparison of the adhesion ability of different Salmonella enteritidis serotypes to materials used in kitchens

Contamination of kitchen surfaces due to bacteria present in foodstuffs is one of the main causes of foodborne outbreaks. Salmonella infections are an important cause of foodborne disease, and Salmonella Enteritidis is the most common isolate in the past few years. In this study, the adhesion ability of four Salmonella Enteritidis isolates to different materials (polyethylene, polypropylene, and granite) used in kitchens was compared. The results indicated that the two plastic materials were generally less prone to colonization than was the granite. As surface properties of both bacteria and materials are a determinant in the adhesion process, surface hydrophobicity was determined through contact angle measurement, and the roughness of the materials was evaluated through the R(a) and R(z) values by a noncontact laser stylus tracing. The four Salmonella strains showed similar degrees of hydrophilicity, while the materials were hydrophobic, with granite having a very low degree of hydrophobicity (deltaG(lwl) = -4.7 mJ/m2). However, the different extents of adhesion could not be explained in terms of surface hydrophobicity and roughness of the materials tested. The main conclusion to be drawn is that Salmonella adhesion is strongly strain dependent, despite the similar degree of hydrophobicity displayed by all the strains assayed, and this can constitute a factor of virulence among the different serotypes.     

铜版纸水性上光工艺对上光质量的影响

为了研究铜版纸水性上光涂布工艺对印品质量的影响,得到最佳的涂布工艺参数,使用IGT印刷适性仪在一定印刷条件下对铜版纸实地打样,分别在不同的涂布速度与涂布厚度下,对各印刷样张进行水性光油上光涂布,通过测试各样张的光泽度和耐折度,比较不同工艺条件下上光前后印品光泽度和耐折度的变化,探讨涂布速度、涂布厚度对水性上光质量的影响。结果表明,涂布速度和涂布厚度与印品的光泽度和耐折度有关。上光印品的光泽度和耐折度会随着涂布速度和涂布厚度的增大而增大,其增量有最大值。合理匹配上光工艺的这两个条件,能够获得最佳上光工艺参数。     

Relative performance of soft contact lenses having lathe-cut posterior surfaces with and without additional polishing.

After a preliminary investigation of the effects of tool feed rate and spindle speed on the surface roughness of unhydrated, lathe-cut polymacon surfaces, a laboratory and clinical comparison was made between lenses with identical parameters except that the lathe-cut posterior surface was left unpolished in the "test" lenses and was polished in the "control" lenses. The lenses had moulded anterior surfaces. Laboratory comparisons included surface roughness, lens power and its uniformity across the surface. Double-blind clinical trials over 4-hour (27 subjects) and 1-month (10 subjects) periods, involved one eye of each subject wearing a "test" lens and the other, a "control" lens. No clinically significant differences were found between the results for the test and control lenses. It is concluded that today's lathing technology makes a final polishing stage unnecessary.     

细菌纤维素对纸张印刷适性的影响

将不同比例的细菌纤维素和麦草浆混合抄造试样。研究细菌纤维素对纸张白度、光泽度、平滑度、表面强度、油墨吸收性和表面效率等印刷适性指标的影响。结果表明:纸浆中添加3%的细菌纤维素,表面强度提高4.34%,光泽度提高36.89%,平滑度提高87.88%,表面效率提高4.37%,可以较好地改善纸张的印刷适性。