Shrinkage of Tape Cast Products During Binder Burnout
Shrinkage of Tape Cast Products During Binder Burnout
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DOI：
10.1111/jace.13270
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发表时间：
2015-01-01
影响因子：
3.9
通讯作者：
Roosen, Andreas
中科院分区：
文献类型：
--
作者：
Fu, Zongwen;Roosen, Andreas
在铸带产品烧结过程中，出现各向异性收缩，这可归因于颗粒和孔隙取向的各向异性绿带结构。关于粘结剂烧坏时的收缩率及其与绿带微观结构（包括粘结剂-增塑剂相）的关系，目前所知甚少。因此，本文测定了不同颗粒形状的氧化铝粉制备的绿带在粘结剂燃尽和预烧过程中在各个空间方向上的收缩行为。还讨论了预烧后的收缩率相对于坯态和脱脂态。在不同的工艺参数下，特别是在绿带中粘合剂-增塑剂相的热行为上，研究了收缩行为和微观结构之间的相互关系。结果表明，从总收缩率中减去BBO收缩率，烧结收缩率在z方向上的各向异性数据完全不同。
During sintering of tape cast products, anisotropic shrinkage occurs, which can be attributed to an anisotropic green tape structure concerning particle and pore orientation. Little is known about the shrinkage during binder burnout (BBO) and its relation to the microstructure of green tapes including the binder-plasticizer phase. Therefore, the article determines the shrinkage behavior of green tapes derived from alumina powders with different particle shape during binder burnout and prefiring in all spatial directions. The shrinkage after prefiring relative to the green and the debindered states is also discussed. The interrelation between shrinkage behavior and microstructure is investigated in dependence on different process parameters and specifically on the thermal behavior of the binder-plasticizer phase in the green tapes. It is shown that the subtraction of the BBO shrinkage from the total shrinkage results in completely different data for the sintering shrinkage anisotropy in z direction.