公开(公告)号：KR1020140021791A

公开(公告)日：2014-02-20

申请号：KR1020120087917

申请日：2012-08-10

Applicant: 한국교통대학교산학협력단

Inventor： 윤만순 ,  어순철 ,  이영근

IPC: C01G49/00 ,  C01B25/37 ,  H01M10/052

CPC classification number: C01B25/375 ,  H01M4/362 ,  H01M4/38 ,  H01M4/5825 ,  H01M10/052

Abstract: Disclosed are a production method of FePO4 using pH control, and a production method of LiFePO4/C for a positive electrode of a lithium secondary battery. The production method of FePO4 by the present invention comprises the following steps: (a) a step for adding a tervalent iron containing material into a phosphate containing solution; (b) a step for precipitating FePO4 by adjusting the pH of the solution from the (a) step; (c) a step for filtering the precipitated FePO4; and (d) a step for drying the filtered FePO4. [Reference numerals] (AA) Start; (BB) End; (S110) Add FeCL_3 in H_3PO_4 solution; (S120) FePO_4 precipitation through adding NH_4OH; (S130) Washing/filtering; (S140) Drying; (S150) Heat treatment

Abstract translation: 公开了使用pH控制的FePO 4的制造方法和锂二次电池的正极的LiFePO 4 / C的制造方法。 本发明的FePO 4的制造方法包括以下步骤：（a）将含有三价含铁材料添加到含磷酸盐溶液中的工序; （b）通过调节来自（a）步骤的溶液的pH来沉淀FePO 4的步骤; （c）过滤沉淀的FePO 4的步骤; 和（d）用于干燥过滤的FePO 4的步骤。 （附图标记）（AA）开始; （BB）结束; （S110）在H_3PO_4溶液中加入FeCl_3; （S120）通过添加NH_4OH沉淀FePO_4; （S130）洗涤/过滤; （S140）干燥; （S150）热处理

公开(公告)号：KR1020090005831A

公开(公告)日：2009-01-14

申请号：KR1020070069194

申请日：2007-07-10

Applicant: 한국교통대학교산학협력단

Inventor： 윤만순

IPC: H01L41/16 ,  H01L41/187

CPC classification number: H01L41/1871 ,  H01L41/43

Abstract: The piezoelectric material and piezoelectric element are provided to improve the piezoelectricity/dielectric property including the piezo-electric constant, electromechanical coupling coefficient, machine goods quality element by controlling the content of the CaO / MnO. The raw material including the Bi2O3, Na2 O3, Ba2O5, TiO2, Ca2CO3, MnO is prepared(S100). The first powder is formed by performing the ball milling(S200). In the thermal annealing temperature 700°C - 1000°C after drying, the first powder is sintered to form the second powder(S300). The second powder is molded and the molding product is formed (S400). The piezoelectric element is formed(S500) by increasing the ramp-up rate of 2°C / min or 4°C / min in the sintering temperature 1000°C or 1300°C.

Abstract translation: 提供压电材料和压电元件，以通过控制CaO / MnO的含量来提高压电/介电性能，包括压电常数，机电耦合系数，机器质量元素。 制备包括Bi 2 O 3，Na 2 O 3，Ba 2 O 5，TiO 2，Ca 2 CO 3，MnO的原料（S100）。 通过进行球磨来形成第一粉末（S200）。 在干燥后的700℃〜1000℃的热退火温度下，将第一粉末烧结形成第二粉末（S300）。 第二粉末被模制并形成模塑产品（S400）。 通过在烧结温度1000℃或1300℃下增加2℃/分钟或4℃/分钟的升温速率来形成压电元件（S500）。