CAJ | 학술논문

以 Nd2 O 3、Y2 O 3、NH 4 Al(SO 4)2??12 H 2 O为原料,NH 4 HCO 3为沉淀剂,采用顺序、反序和并流3种不同共沉淀加料方式,在高滴加速率条件下制取了掺钕钇铝石榴石(Nd∶YAG)粉体,比较工艺操作,表征其相组成、显微形貌、粒度分布和烧结后陶瓷的透过率。结果表明,并流共沉淀工艺无需调节 pH 值,工艺操作最简单；经1100℃煅烧,反序、并流法制备的粉体均为纯相 YAG,顺序制备的粉体含有杂相,其中并流法制备的粉体粒径分布窄,颗粒呈类球形,粉体活性高。采用真空烧结技术于1715℃下烧结制备了Nd∶YAG 陶瓷,顺序、反序和并流样品在1064 nm处透过率分别为68％,70％和75％。
이 Nd2 O 3、Y2 O 3、NH 4 Al(SO 4)2??12 H 2 O위원료,NH 4 HCO 3위침정제,채용순서、반서화병류3충불동공침정가료방식,재고적가속솔조건하제취료참녀을려석류석(Nd∶YAG)분체,비교공예조작,표정기상조성、현미형모、립도분포화소결후도자적투과솔。결과표명,병류공침정공예무수조절 pH 치,공예조작최간단；경1100℃단소,반서、병류법제비적분체균위순상 YAG,순서제비적분체함유잡상,기중병류법제비적분체립경분포착,과립정류구형,분체활성고。채용진공소결기술우1715℃하소결제비료Nd∶YAG 도자,순서、반서화병류양품재1064 nm처투과솔분별위68％,70％화75％。
Yttrium aluminum garnet (YAG)powders were synthesized by co-precipitation with forward-titra-tion,reverse-titration and parallel flow using NH 4 Al(SO 4 )2 ??12 H 2 O,Y2 O 3 ,Nd2 O 3 as starting materials and NH 4 HCO 3 as precipitant at a high rate of adding the materials.The difference of the processes was discussed and the phase composition,morphology,particle size distribution of the powders were measured.It was found that parallel flow was simple to operate without adjusting pH value.The powders by reverse titration and paral-lel flow are of pure-phase YAG,while the powders by forward-titration were of major-phase YAG and a trace amount of other phase.The powders by parallel flow are well dispersed with a narrow size distribution,spheri-cal morphology and the highest activity.After YAG ceramics are sintered at 1 715 ℃ in vacuum,the transmit-tance of mirror-polished samples by forward-titration,reverse-titration and parallel flow were 68%,70%, 75%,respectively.