广东化工
廣東化工
엄동화공
GUANGDONG CHEMICAL INDUSTRY
2013年
7期
47-48
,共2页
钕铁硼粘结磁体%非牛顿指数%表观粘度%粘流活化能
釹鐵硼粘結磁體%非牛頓指數%錶觀粘度%粘流活化能
녀철붕점결자체%비우돈지수%표관점도%점류활화능
NdFeB bonded magnet%non-Newtonian index%apparent viscosity%flow activation energy
文章以通用聚苯乙烯(GPPS)为粘结剂,采用毛细管流变仪研究了钕铁硼(NdFeB)与 GPPS 粘结磁体的流变行为.结果表明:NdFeB/GPPS 体系为非牛顿型流动体系,遵从假塑性流体的流动规律;表观粘度随着剪切速率的增加而下降,随着磁粉含量的增加而上升;随着温度的升高,熔体的非牛顿指数呈增大的趋势,而随着磁粉含量的增加,熔体的非牛顿指数呈减小的趋势;粘流活化能随磁粉含量的增加而增大,随剪切应力的增加而降低,但变化均较小.
文章以通用聚苯乙烯(GPPS)為粘結劑,採用毛細管流變儀研究瞭釹鐵硼(NdFeB)與 GPPS 粘結磁體的流變行為.結果錶明:NdFeB/GPPS 體繫為非牛頓型流動體繫,遵從假塑性流體的流動規律;錶觀粘度隨著剪切速率的增加而下降,隨著磁粉含量的增加而上升;隨著溫度的升高,鎔體的非牛頓指數呈增大的趨勢,而隨著磁粉含量的增加,鎔體的非牛頓指數呈減小的趨勢;粘流活化能隨磁粉含量的增加而增大,隨剪切應力的增加而降低,但變化均較小.
문장이통용취분을희(GPPS)위점결제,채용모세관류변의연구료녀철붕(NdFeB)여 GPPS 점결자체적류변행위.결과표명:NdFeB/GPPS 체계위비우돈형류동체계,준종가소성류체적류동규률;표관점도수착전절속솔적증가이하강,수착자분함량적증가이상승;수착온도적승고,용체적비우돈지수정증대적추세,이수착자분함량적증가,용체적비우돈지수정감소적추세;점류활화능수자분함량적증가이증대,수전절응력적증가이강저,단변화균교소.
The rheological behavior of the NdFeB/GPPS bonded magnet was studied by capillary rheometer. The research results showed that the NdFeB/GPPS system was non-Newtonian pseudo plastic fluid, which followed the law of the pseudo plastic fluid. The apparent viscosity of the melt decreased with the increasing of shear rate, but it increased with the increasing of the amount of the NdFeB powder. The non-Newtonian index of the melt increased with the increasing of the temperature, while it decreased with the increasing of the amount of the NdFeB powder. The flow activation energy increased with the increasing of the amount of the NdFeB powder, while it decreased with the increasing share rate, both of the changes were small.
