二次孔

用正电子湮没技术研究USY沸石的二次孔结构

Secondary pore structure of USY zeolites studied by positron annihilate technique

对水热处理过程二次孔的形成规律进行了系统研究，首次提出了经介稳态形成二次孔的机理。由此可以解释分子筛水热处理过程中总孔容提高现象。

After systematical study on the formation of secondary pore , a new secondary pore formation mechanism was proposed .

设计了具有较多二次孔、非骨架铝少、铝分布均匀、结构热稳定性优异的超稳Y型分子筛制各方法。

An USY type zeolite with uniform AI distribution , good thermal stability , appropriate secondary macropores and without NFA was developed .

结果表明，反应1000小时后，催化剂上的焦主要沉积在沸石晶粒外表面与粘结剂组成的二次孔中；

It shows that the " coke " on the catalyst is mainly deposited in the secondary formed between the surface of zeolite crystal particle and adhesives , after 1000 hrs reaction .

二次封孔对化学镀双层镍磷合金耐蚀性的影响

Impact of Second Sealing-Treatment on Corrosion Resistance of Double Electroless Ni-P Deposits

收缩缺陷包括敞开性缩孔、二次缩孔以及轴线缩孔。

The shrinkage defects include primary piping , secondary piping , and centreline shrinkage .

煤层瓦斯抽放钻孔的二次封孔方法研究

A Study of the Second Hole Sealing Method to Improve Gas Drainage in Coal Seams

在碱性处理条件下，二次中孔的体积和孔径较小；

On treating with base β molecular sieve had a small volume and diameter of secondary mesopore ;

以正交实验为基础，从球铁件缩孔形成机制出发，建立了动态体积改变积聚法及结合临界固相率来预测二次缩孔的数学模型。

Based on the orthogonality experiment and come from shrinkage forming mechanism , a new mathematical model called Dynamic Volume Change Accumulation combined with the critical solid fraction Fsc is proposed in this paper .

TEM测定α-Al2O3载体的二次粒子堆积孔大小及分布

Measurement of size and distribution of secondary particle piled pore of α - Al_2O_3 carrier by TEM

在两种近似情况下，建立了α-Al2O3载体的二次粒子堆积孔模型；

A model of the secondary particle piled pore of α - Al 2O 3 carrier was set in two approximate cases .

在此基础上，我们配套应用流线模型、层段配注量优化模型、措施井参数优化设计等多种综合技术，摸清了二次加密井补孔潜力，确定了补孔原则及方案。

On the basis , we make use comprehensively of multiple technology including the streamline model , optimization model of interval injection allocation , parameter optimization design of the measure etc. We find out the perforation potential of secondary readjustment well pattern , compiling perforation principle and program .