Abstract:
There are provided a grain-oriented electrical steel sheet having excellent magnetic properties and a method for manufacturing the same. More particularly, there are provided a grain-oriented electrical steel sheet whose magnetic properties is remarkably improved to the extent that is unexpected in similar component systems in the prior art by adjusting contents of the components and improving the manufacturing method and, a method for manufacturing the same. The grain-oriented electrical steel sheet essentially comprises 0.Q3 to 0.07% by weight of Sn, 0.01 to 0.5% by weight of Sb, and 0.01 to 0.05% by weight of P.
Abstract:
A magnetic nanocatalyst composition comprising a plurality of transition metal nanoparticles and a plurality of magnetic nanoparticles, wherein the transition metal nanoparticles and the magnetic nanoparticles are supported by a support material has a high activity and can be easily recovered from a reaction mixture by using a magnet.
Abstract:
A highly active and recyclable supported transition metal catalyst can be prepared by a simple process comprising mixing with heating a transition metal complex, a metal-chelating agent and an alkoxide of Ti, Al or Si, followed by treatment with water to induce a sol-gel reaction among the reactants.
Abstract:
The present invention provides a method for producing lithium titanate with a nanostructure, comprising: a first step of providing lithium titanate with a nanotube structure, and providing TiO2 powder at a metastable state; a second step of enabling the TiO2 powder to react in an LiOH aqueous solution to form stratified titanate containing the Li ingredient by an ion exchange method; a third step of heat treating the titanate to convert the stratified titanate into a nanotube structure; and a fourth step of drying the resulting material.
Abstract:
The present invention relates to a coating agent, to a preparation method thereof, and to the use thereof, and more particularly, aims to manufacture a grain-oriented electrical steel sheet having great tensile stress caused by an insulation film. To achieve the aim, the coating agent of the present invention consists of phosphate, colloid silica, and hematite sol, and cobalt hydroxide or boric acid is added to the coating agent. The method for preparing a coating agent of the present invention includes a step of preparing a silica-hematite mixture solution (1) by injecting hematite sol into colloid silica and stirring the mixture, as well as a step of preparing a mixture solution (2) by gradually injecting phosphate into the silica-hematite mixture solution (1) prepared in the previous step. Further, the present invention provides a grain-oriented electrical steel sheet wherein the steel sheet having a surface coated with the coating agent has a coating tension of 0.30~1.02 kg/mm2, and provides a method for manufacturing a grain-oriented electrical steel sheet, including the steps of applying the coating agent to a grain-oriented electrical steel sheet such that the amount of coating agent applied on the dried coated film of the steel sheet is 0.5~6.0 g/m2, and performing heat treatment in two stages. The coating agent of the present invention is capable of forming a dense coated film when used in an electrical steel sheet or the like, and improving the adhesion property, film tension allowance, and abrasion resistance thereof as compared to conventional films.
Abstract translation:本发明涉及一种涂布剂,其制备方法及其用途,更具体地涉及制造由绝缘膜引起的拉伸应力大的方向性电磁钢板。 为了达到目的,本发明的涂层剂由磷酸盐,胶体二氧化硅和赤铁矿溶胶组成,向该涂层剂中加入氢氧化钴或硼酸。 制备本发明的涂布剂的方法包括通过将赤铁矿溶胶注入胶体二氧化硅并搅拌混合物以及制备混合溶液(2)的步骤来制备二氧化硅 - 赤铁矿混合物溶液(1) 通过将磷酸盐逐渐注入上一步制备的二氧化硅 - 赤铁矿混合溶液(1)中。 另外,本发明提供了一种方向性电磁钢板,其特征在于,具有涂布所述涂布剂的表面的钢板的涂布张力为0.30〜1.02kg / mm 2,并且提供了一种制造方向性电磁钢板的方法 包括以下步骤:将涂布剂施加到方向性电磁钢板上,使得施加在钢板的干燥涂膜上的涂布剂的量为0.5〜6.0g / m 2,并进行两个阶段的热处理。 本发明的涂布剂能够在电工钢板等中使用时形成致密的涂膜,与以往的膜相比,能够提高粘附性,膜张力容许性和耐磨损性。
Abstract:
There are provided a grain-oriented electrical steel sheet having excellent magnetic properties and a method for manufacturing the same. More particularly, there are provided a grain-oriented electrical steel sheet whose magnetic properties is remarkably improved to the extent that is unexpected in similar component systems in the prior art by adjusting contents of the components and improving the manufacturing method and, a method for manufacturing the same. The grain-oriented electrical steel sheet essentially comprises 0.Q3 to 0.07% by weight of Sn, 0.01 to 0.5% by weight of Sb, and 0.01 to 0.05% by weight of P.