公开(公告)号：KR1020040023039A

公开(公告)日：2004-03-18

申请号：KR1020020054655

申请日：2002-09-10

Applicant: 한국과학기술연구원

Inventor： 김대준 ,  이준강 ,  심형보

IPC: C04B35/634

CPC classification number: C04B35/63444 ,  C04B35/63416 ,  C04B35/63424 ,  C04B35/63488

Abstract: PURPOSE: A preparation method of ceramic slurry containing binders such as PVP for spray drying is provided. The granular particles obtained from the slurry are easily broken up in forming, thereby preventing the formation of defects in ceramic compacts. CONSTITUTION: The ceramic slurry is prepared by the following steps of: mixing solvent, 20-50vol.%(based on the solvent) of ceramic powder and 0.1-5wt.%(based on the ceramic powder) dispersant such as ammonium polyacrylate; adding 0.1-5wt.% (based on the ceramic powder) of binders; and adding 0.1-1wt.%(based on the ceramic powder) of plasticizer such as triethylene glycol(TEG), glycerine or glycol. The binders are polyvinyl pyrrolidone(PVP), a mixture of PVP and polyethylene oxide(PEO), or a mixture of PVP and polyvinyl alcohol(PVA), and the binders are added in a form of solution obtained by dissolving 5-25wt.% of PVP or 0.4-5wt.% of PEO in water.

Abstract translation: 目的：提供含有粘合剂如PVP的喷雾干燥的陶瓷浆料的制备方法。 从浆料获得的粒状颗粒在成型时容易分解，从而防止在陶瓷压块中形成缺陷。 构成：通过以下步骤制备陶瓷浆料：将20-50vol。％（基于溶剂）的陶瓷粉末和0.1-5wt％（基于陶瓷粉末）分散剂如聚丙烯酸铵混合; 加入0.1-5重量％（基于陶瓷粉末）的粘合剂; 并加入0.1-1重量％（基于陶瓷粉末）的增塑剂如三甘醇（TEG），甘油或二醇。 粘合剂是聚乙烯吡咯烷酮（PVP），PVP和聚环氧乙烷（PEO）的混合物，或PVP和聚乙烯醇（PVA）的混合物，并且粘合剂以通过将5-25重量％ 的PVP或0.4-5wt。％的PEO在水中。