公开(公告)号：US20230203674A1

公开(公告)日：2023-06-29

申请号：US17560303

申请日：2021-12-23

申请人： NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

发明人： JIAN-LONG RUAN ,  YANG-KUAO KUO

IPC分类号： C25B1/01 ,  B22F9/14 ,  C25B9/65 ,  C25B1/50

CPC分类号： C25B1/01 ,  B22F9/14 ,  C25B9/65 ,  C25B1/50 ,  B22F2304/10 ,  B22F2302/253

摘要： Provides a method for producing aluminum oxide powder by electrochemical dissolving aluminum salt, comprise: (A) providing an electrochemical device with an aluminum material as an anode and an acidic solution as an electrolyte; (B) accelerating the dissolution of the aluminum material by current pulse method to form an acidic aluminum salt solution; (C) neutralizing the acidic aluminum salt solution with a basic solution to form an aluminum hydroxide sol; (D) adding an additive in the aluminum hydroxide sol, filtering the aluminum hydroxide sol and drying to obtain aluminum hydroxide powder; (E) roasting the aluminum hydroxide powder to form micron scale γ-aluminum oxide powder. Combines the acidic aluminum salt method and the electrochemical dissolution method to improve the dissolving rate of the aluminum material and increase the output efficiency of the acidic aluminum salt, and obtaining micron scale γ-aluminum oxide powder.

公开(公告)号：US20240199421A1

公开(公告)日：2024-06-20

申请号：US18081711

申请日：2022-12-15

申请人： NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

发明人： JIAN-LONG RUAN ,  CHENG-HUNG SHIH

IPC分类号： C22C1/051

CPC分类号： C22C1/051

摘要： A method for preparing aluminum nitride powder, comprising: (A) providing an aluminum metal powder and a carbon source, and mixing the aluminum metal powder and the carbon source to form a mixed powder; (B) performing a medium-low-temperature nitriding reaction on the mixed powder to form a partially nitrided aluminum nitride powder containing an intermediate aluminum carbide phase; (C) subjecting the partially nitrided aluminum nitride powder to a high-temperature nitriding reaction to remove the intermediate aluminum carbide phase and form a fully nitrided aluminum nitride powder; and (D) decarbonizing the fully nitrided aluminum nitride powder in the atmosphere to form a high-purity aluminum nitride powder. Compared with the direct nitriding method of aluminum powder, although additionally introduces the carbon mixing and decarbonizing steps, the subsequent grinding steps can also be omitted, thereby avoiding the introduction of redundant impurities and improving the purity of the output aluminum nitride powder.

公开(公告)号：US20150155194A1

公开(公告)日：2015-06-04

申请号：US14280703

申请日：2014-05-19

申请人： NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

发明人： YANG-KUO KUO ,  JIAN-LONG RUAN ,  CHENG-HUNG SHIH ,  LEA-HWUNG LEU

IPC分类号： H01L21/683 ,  C04B37/00

CPC分类号： C04B37/00 ,  B32B18/00 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/661 ,  C04B2237/366 ,  H01L21/6831

摘要： A method of preparing a heterogeneous stacked co-fired ceramic for use in an aluminum nitride-based electrostatic chuck includes providing a first aluminum nitride blank layer; applying a metal ink to the first aluminum nitride blank layer to form thereon an electrostatic electrode layer by screen printing, wherein the metal ink mainly contains a metal of high melting point; stacking a second aluminum nitride blank layer on the electrostatic electrode layer; laminating the first aluminum nitride blank layer, the electrostatic electrode layer, and the second aluminum nitride blank layer (collectively known as a heterogeneous ceramic) together; and co-firing the laminated heterogeneous ceramic in accordance with a sintering temperature rising curve to prepare the heterogeneous stacked co-fired ceramic characterized by reduced differences in sintering shrinkage ratio between the electrostatic electrode and aluminum nitride blank and enhanced strength and adhesion of the interface between the electrostatic electrode and aluminum nitride blank.

摘要翻译： 一种制备用于氮化铝基静电卡盘的异质堆叠共烧陶瓷的方法，包括提供第一氮化铝坯料层; 将金属油墨施加到第一氮化铝坯料层上，通过丝网印刷在其上形成静电电极层，其中金属油墨主要含有高熔点金属; 在所述静电电极层上堆叠第二氮化铝坯料层; 将第一氮化铝坯料层，静电电极层和第二氮化铝空白层（统称为异质陶瓷）层叠在一起; 并根据烧结温度升高曲线共烧烧层压的异相陶瓷，制备出异质层叠共烧陶瓷，​​其特征在于静电电极和氮化铝坯料之间的烧结收缩率差异减小，并提高了强度和界面附着力 静电电极和氮化铝空白。