Abstract Tetramethyl ammonium hydroxide (TMAH) has been demonstrated to increase solids loading effectively and to accelerate gelling rate of alumina slurries gelled by Isobam (a copolymer of isobutylene and maleic anhydride) system. With 0.5 vol% addition of TMAH, solids loading of alumina slurry was increased from 56 vol% to 58 vol%. Meanwhile, storage modulus (G’) of the slurry with 56 vol% solids loading was increased from 964 Pa to 2850 Pa at a testing time of 30 min. The enhanced dispersing and gelling behavior was ascribed to the hydrolysis and hydrophobic modification of Isobam by TMAH. Flexural strength of the final alumina ceramics from 58 vol% solids loading was 543 ± 10 MPa, higher than that of the ceramics from 56 vol% solids loading (531 ± 13 MPa).

中文翻译：

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TMAH对凝胶注模用氧化铝浆料流变行为的影响

摘要 四甲基氢氧化铵 (TMAH) 已被证明可以有效地增加固体负载并加快由 Isobam（异丁烯和马来酸酐的共聚物）体系胶凝的氧化铝浆液的胶凝速率。添加 0.5 vol% TMAH 后，氧化铝浆料的固体负载量从 56 vol% 增加到 58 vol%。同时，在 30 分钟的测试时间内，具有 56 vol% 固体负载的浆料的储能模量 (G') 从 964 Pa 增加到 2850 Pa。增强的分散和胶凝行为归因于 TMAH 对异巴胺的水解和疏水改性。58 vol% 固体负载的最终氧化铝陶瓷的弯曲强度为 543 ± 10 MPa，高于 56 vol% 固体负载的陶瓷 (531 ± 13 MPa)。