稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2009年
z2期
175-178
,共4页
付长翼%罗凌虹%程亮%石纪军%卢泉%吴也凡
付長翼%囉凌虹%程亮%石紀軍%盧泉%吳也凡
부장익%라릉홍%정량%석기군%로천%오야범
99氧化铝%水基流延%复合粘结剂%烧结
99氧化鋁%水基流延%複閤粘結劑%燒結
99양화려%수기류연%복합점결제%소결
99 alumina%tape casting%cobinder%sintering
研究了乳胶+PVA复合粘结剂体系水基流延浆料制备99氧化铝陶瓷基片.通过研究浆料pH值、分散剂、粘结剂的比例等因素对水基流延浆料流变学性能的影响,得到了水基流延浆料的最佳配比范围.当pH值为9.0时,分散剂PAA含量为粉料的0.8%(质量分数)时能获得固含量为55vol%、稳定分散的氧化铝浆料.研究表明PVA与乳胶的化学相容性好,采用两种粘结剂复合,可以互补不足.加入复合粘结剂4.5%(质量分数) (乳胶:PVA=7:3),制备出的99氧化铝素坯片其厚度可在50~1000 μm之间进行调控,素坯相对密度可以达到56%左右.制备的流延片在烧结温度1650 ℃、保温2 h的条件下获得了相对密度为98.5%、平整、半透明的99氧化铝陶瓷基片.
研究瞭乳膠+PVA複閤粘結劑體繫水基流延漿料製備99氧化鋁陶瓷基片.通過研究漿料pH值、分散劑、粘結劑的比例等因素對水基流延漿料流變學性能的影響,得到瞭水基流延漿料的最佳配比範圍.噹pH值為9.0時,分散劑PAA含量為粉料的0.8%(質量分數)時能穫得固含量為55vol%、穩定分散的氧化鋁漿料.研究錶明PVA與乳膠的化學相容性好,採用兩種粘結劑複閤,可以互補不足.加入複閤粘結劑4.5%(質量分數) (乳膠:PVA=7:3),製備齣的99氧化鋁素坯片其厚度可在50~1000 μm之間進行調控,素坯相對密度可以達到56%左右.製備的流延片在燒結溫度1650 ℃、保溫2 h的條件下穫得瞭相對密度為98.5%、平整、半透明的99氧化鋁陶瓷基片.
연구료유효+PVA복합점결제체계수기류연장료제비99양화려도자기편.통과연구장료pH치、분산제、점결제적비례등인소대수기류연장료류변학성능적영향,득도료수기류연장료적최가배비범위.당pH치위9.0시,분산제PAA함량위분료적0.8%(질량분수)시능획득고함량위55vol%、은정분산적양화려장료.연구표명PVA여유효적화학상용성호,채용량충점결제복합,가이호보불족.가입복합점결제4.5%(질량분수) (유효:PVA=7:3),제비출적99양화려소배편기후도가재50~1000 μm지간진행조공,소배상대밀도가이체도56%좌우.제비적류연편재소결온도1650 ℃、보온2 h적조건하획득료상대밀도위98.5%、평정、반투명적99양화려도자기편.
In the paper, a cobinder, consisting of polyvinyl alcohol (PVA) and PAA latex, was used to prepare the 99 alumina substrate via aqueous tape casting. The rheological properties of alumina slurry as the function of the pH value, the amount of dispersant and binder were discussed. The high volume of solid-loading slurry with stability, appropriate viscosity and easy-casting could be obtained. The stable slurry with solid loading of 55vol% was produced at the pH value of 9.0 and dispersant PAA content of 0.8 wt%. The research shows that the chemical compatibility was good between PVA and latex. The better effect can be accessed using co-binder of PVA and latex. The green tape with 56% relative density and the thickness of 50~1000 μm can be obtained via adding 4.5 wt% co-binder (latex:PVA = 7:3). The flat and translucent alumina substrate with above 98.5% relative density could be produced at the sintering temperature of 1650 ℃ for 2 h.