Study on Electrorheological Fluids Dispersing Ferroelectrics in the Range of Size Dependence

电流变流体在尺寸依赖性范围内分散铁电体的研究

• 批准号: 06453079
• 负责人: IKAWA Hiroyuki
• 金额: $ 3.97万
• 依托单位: Kanagawa Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06453079/
• 关键词: Electrorheology; Barium Titanate; Ferroelectrics; Size Effect; Surfactant; 電気粘性流体; 電気粘性効果

* Electrorhelogical Effects as Functions of Heating Temperatures of Fine Powders of Barium Titanate and Ba_<0.8>Sr_<0.2>TiO_3The raw fine powders of BaTiO_3 and Ba_<0.8>Sr_<0.2>TiO_3 were hydrothermally synthesized with particle sizes of 0.1mum. The powders were heated at temperatures to thoroughly disperse in silicon oil with a volume ratio of 10%. Electrorheologies of dispersed oils were measured by using a double cylinder rheometer. An interesting result was noted that electrorhelogical effects -the increase in shear stress by applying a dc electric field, 2 kV/mm in this case - took singular peaks for powders heated at specific temperatures. The respective those temperatures for BaTiO_3 and Ba_<0.8>Sr_<0.2>TiO_3 were 700ﾟC and 900ﾟC.The X-ray diffractions revealed that the 200 peaks of those powers were just before 200/002 splittings which were characteristic to ferroelectrics.* Colloid Chemistry of Barium Titanate and Electrorheology of Surface Treated Barium TitanateThe zeta -potential of BaTiO_3 dispersed in ethanol was 40 mV.The adsorption of sodium dodecyl sulfate decreased the potential to 16 mV,and sodium alpha-olefin sulfonate decreased it down to minus.BaTiO_3 were mixed with toluene containing poly-buthyl metacrylate. The apparent viscosity of the dispersed oil was 1/5 of that containing non-treated BaTiO_3. However, the ER effect also decreased in half.

用水热法合成了BaTiO_3和BaT；0.2wt；0.2wt；0.2wt；0.2um。将粉末加热至完全分散在体积比为10%的硅油中。用双圆筒流变仪测定了分散油的电流变性能。一个有趣的结果是，电流变效应--通过施加2千伏/毫米的直流电场来增加剪切应力--对于在特定温度下加热的粉末出现了单峰。BaTiO_3和BaTiO_3相对应的温度为0.8&gT；X-射线衍射谱表明，这些粉末的200个峰正好在200/002裂解之前，这是铁电性的特征。钛酸钡的胶体化学和表面处理的钛酸钡的电流变学。分散在乙醇中的BaTiO_3的zeta电位为40 mV。十二烷基硫酸钠的吸附使其电位降至16 mV，而α-烯烃磺酸钠的吸附使其降至极小。分散油的表观粘度是未处理BaTiO_3的1/5，但电流变效应也降低了一半。

项目成果

Shirakami, Fukui, Izumisawa Atake, Ikawa: "Studies of Thermal Tpeatment of Fine Powders of BaTiO_3" Reports of Research Laboratory of Engineering Materials, TIT. 21. 1-4 (1996)

Shirakami、Fukui、Izumisawa Atake、Ikawa：“BaTiO_3 细粉的热处理研究”TIT 工程材料研究实验室的报告。

H.Ikawa,T.Omata,M.Satou,T.Katou,T,Hayashi: "Electrorheology Dispecsing Size Dependent Ferroelectric Powders BaTiO_3 and Ba_<0.8>Sr_<0.2>TiO_3" Ferroelectrics. (発表予定).

H.Ikawa,T.Omata,M.Satou,T.Katou,T,Hayashi：“电流变学探讨尺寸依赖性铁电粉末 BaTiO_3 和 Ba_<0.8>Sr_<0.2>TiO_3”（待提交）。

林 剛,井川博行: "チタン酸バリウムの絶縁油中への分散" 日本セラミックス協会1994年会講演予稿集. 494- (1994)

Tsuyoshi Hayashi、Hiroyuki Ikawa：“绝缘油中钛酸钡的分散”日本陶瓷学会 1994 年年会记录 494- (1994)。

小林洋一,林剛,井川博行: "チタン酸バリウムの絶縁油中への分散-ER流体の作製(3)" 日本セラミックス協会第8回秋季シンポジウム講演予稿集. 277- (1995)

小林洋一、林刚、井川博之：“钛酸钡在绝缘油中的分散-ER液的制备（3）”日本陶瓷学会第八届秋季研讨会论文集277-（1995）。

T.Shirakami, Y.Fukui, S.Izumisawa, T.Atake, and H.Ikawa: "Studies of thermal treatment on fine powder of barium titanate" Report of the Research Laboratory of Engineering Materials, Tokyo Institute of Technology. 21. 1-4 (1996)

T.Shirakami、Y.Fukui、S.Izumisawa、T.Atake、H.Ikawa：《钛酸钡细粉热处理研究》东京工业大学工程材料研究实验室的报告。