In this paper, the recovery and nanoparticle synthesis of Ag from low temperature co-fired ceramic (LTCC) by-products are studied. The effect of reaction behavior on Ag leaching conditions from the LTCC by-products is confirmed. The optimum leaching conditions are determined to be: 5 M HNO3, a reaction temperature of 75℃, and a pulp density of 50 g/L at 60 min. For the selective recovery of Ag, the [Cl]/[Ag] equivalence ratio experiment is performed using added HCl; most of the Ag (more than 99%) is recovered. The XRD and MP-AES results confirm that the powder is AgCl and that impurities are at less than 1%. Ag nanoparticles are synthesized using a chemical reduction process for recycling, NaBH4 and PVP are used as reducing agents and dispersion stabilizers. UV-vis and FE-SEM results show that AgCl powder is precipitated and that Ag nanoparticles are synthesized. Ag nanoparticles of 100% Ag are obtained under the chemical reaction conditions.

Abstract
 서 론
 2. 실험 방법
  2.1. 실험재료
  2.2. 불순물 저감 공정을 이용한 선택적 Ag 분리회수
  2.3. 화학환원공정을 이용한 Ag 전구체로부터 나노입자 제조
  2.4. 특성평가
 3. 결과 및 고찰
  3.1. 침출조건에 따른 Ag 침출거동
  3.2. HCl 투입에 따른 선택적 Ag 회수
  3.3. Agent 조건에 따른 Ag 나노입자 특성확인
 4. 결 론
 References

• 주소영(고등기술연구원 신소재공정센터) | Soyeong Joo
• 안낙균(고등기술연구원 신소재공정센터) | Nak-Kyoon Ahn
• 이찬기(고등기술연구원 신소재공정센터) | Chan Gi Lee
• 윤진호(고등기술연구원 신소재공정센터) | Jin-Ho Yoon Corresponding Author