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1)  porosity evaluation
孔隙率表征
2)  apparent porosity
表观孔隙率
1.
An analysis was performed on difference between the apparent porosity and macro porosity in SEM observation of bentonite microstructure.
对膨润土微观结构SEM观察时出现的表观孔隙率与宏观孔隙率不一致的问题进行了分析,讨论了SEM观察时冻干法对饱和膨润土微观结构的影响,得到表观孔隙率与宏观孔隙率之间的关系式,证实了膨润土中存在粒间孔隙和粒内孔隙,且2种类型的孔隙可以通过SEM的试验方法区分开。
2.
It also studies the influences of W/C ratio, water reducer, and air- detraining admixture on the porosity and apparent porosity and of porosity and apparent porosity on the intensity.
文章简要介绍了水泥石各种类型气孔的形成原因 ,研究了水灰比、减水剂、消泡剂对孔隙率、表观孔隙率及强度等的影响。
3)  Surface porosity factor
表面孔隙率
4)  surface porosity
表层土壤孔隙率
1.
In order to meet the requirement of precision farming for fast acquiring soil surface information in the field,laser profiler is proposed for indirectly estimating the surface porosity by roughness measurement.
针对当前精细农业对农田信息快速采集的需求,本研究提出了基于土壤粗糙度预测表层土壤孔隙率的方法,而采用何种量化指数表征土壤粗糙度是深化研究的关键。
5)  characteristics of porosity and permeability
孔隙度、渗透率特征
6)  pore characteristics
孔隙特征
1.
The pore characteristics were investigated by the image analysis technology, then the factors effecting on the pore were studied.
本文通过真空粉末烧结制备了多孔TiZrNb合金,采用图像分析法对其孔隙特征进行分析,从而研究了各因素对烧结制品孔隙的影响。
2.
The pore characteristics of cement-based composite material after high temperatures were investigated with MIP.
采用压汞测孔法对高温下水泥基复合材料孔隙特征进行了研究。
3.
Through analyzing ceramsite pore characteristics,combined with engineering example,according to used ceramsite pore characteristics and pumping pressure,the measures of determining ceramsite soakage and pre-suction were proposed.
通过对陶粒的孔隙特征进行分析,并结合工程实例,根据所使用陶粒的孔隙特征及泵送压力,提出确定陶粒吸水量及预吸水措施,实践证明:陶粒混凝土用于建筑面层是一种较好的选择。
补充资料:镀层孔隙率
分子式:
CAS号:

性质:单位电镀层表面上存在的孔隙数。即从镀层表面直至基体金属的大小孔道数。它是衡量镀层品质的重要指标。测定镀层孔隙率常用的方法有贴滤纸法、浇浸法和涂膏法等。这些方法的原理大致相同。如贴滤纸法,是在镀层表面上贴置浸有一定检测试液的滤纸。若镀层存在孔隙或裂缝,则检测试液通过孔隙或裂缝与基体金属或底层金属镀层产生化学反应,生成与镀层有明显色差的化合物并渗透到滤纸上,使之呈现出有色斑点,根据有色斑点数确定孔隙率。

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