The fault reasons of a phase c 378mva transformer in one group of main transformers are analyzed by three - ratio method . the improvement measure is presented
Xrd tests show that we have prepared pure lanio3 and pt / c catalysts . the lanio3 powder is electrically conductive . sem examination shows that the pt / c catalyst is the powder of small granules and is uniform in morphology
Based on the understanding of netative poisson ratio mechanism and the characteristics of liquid crystalline polymers , the ability for the smectic liquid crystalline polymers possibly to bear the auxetic behavior was firstly proposed . at the same time the ideal molecular model was upbuilt and the calculation about the negative poisson ratio of smectic liquid crystalline polymers was theoretically carried out
2 , upon heating to their respective melting temperature , all the compounds above went to liquid crystal phase . the typical chiral smectic c phase lined texture and finger print texture , smectic fan texture and broken fan shaped texture , nematic schlieren texture schlieren texture and ball grandle texture , paramorphosis texture can be observed
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