reaction period meaning in Chinese

反应期

The coating effects of these modifiers are evaluated in the order of ( napoa ) 6 > c2hsoh > na2sio3 > h2o > naoh . the organic modification reagent such as sodium stearate and polyethylene glycol can modify the nanosized powders , sodium stearate has good effect when its adding amount to nano - tio2 is 8 % , the concentration is about 0 . 1 mol / l , the value of ph is 5 , and the reaction period is up 30 minutes . to modify the powders with polyethylene glycol , the amount must be limited from 1 % to 2 % , the value of ph is between 3 and 5 , and the reaction period should be up to 2 hours , the effect will be mo
不同分散剂对其分散效果为: ( napo3 ) 6 > czhsoh > n处5103 > hzo > naoh ;采用有机改性剂硬脂酸钠和聚乙二醇进行了纳米二氧化钦的有机改性研究，获得了改性剂用量，浓度等最佳工艺条件的参数;对纳米二氧化钦进行了包裹二氧化硅的研究，适当调整溶液的ph值，滴加硫酸的速度，以及改变滴加方式，获得了较致密的包覆二氧化钦，其分散性和酸溶性都获得了较大程度的改善。