- 學位論文
塑化劑對鈦酸鋇漿體流變行為與刮刀成型薄帶特性研究
Effects of Plasticizers on the Rheological Behavior of the BaTiO3 Slurry and the Properties of the Green Tape
摘要
近幾年來，隨著MLCC產業邁向電容器尺寸的微小，製造超薄的薄帶的課題變的很重要，而刮刀成型法為一個基本且簡單製造薄層陶瓷薄帶的方法。高品質的薄帶需具有一些條件，例如，乾燥的過程中不產生缺陷、均勻的微結構、高機械特性、良好的熱壓能力以及容易脫脂。 本實驗以P1與P2兩種不同的塑化劑，製備以B1為黏結劑的非水系漿體，探討影響鈦酸鋇漿體的流變行為及機械特性的機制、薄帶的熱壓合性質，以及研究黏結劑與塑化劑的混合物的熱裂解行為。實驗結果發現，添加塑化劑的漿體表現較佳的流變特性，例如低的黏度、較低的觸變性等，並且薄帶的上下表面與斷面具備較為均勻的微結構；添加塑化劑的薄帶會減少它的拉伸強度，但是會增加它的伸長率以及與底膜的黏附性；而未添加塑化劑的薄帶呈現典型脆性的行為，而且不具有熱壓合工作性。低塑化的薄帶在疊壓的製程當中，發生了不黏合的現象；後續的燒除製程當中，塑化劑會於接近其熱裂解溫度燒除，不會影響到剩餘高分子混合物的熱裂解溫度。比較添加P2與添加相同量P1的漿體、薄帶與後續試作品，添加P2於製程當中整體有較佳的表現。
並列摘要
In the recent years, ultra thin green tape had become important to the MLCCs industry, due to the downscaling for minimum of the electronic capacitor. Tape casting served as a basic and simple method for the formation of thin ceramic sheet. In order to yield free-defect tape, there are some quality criteria to be considered, such as no defects during drying, microstructural homogeneity, high mechanical strength, good thermocompression ability, and easy burn out. Two plasticizers, P1 and P2, were employed in the slurry, prepared in nonaqueous media with B1, and discussed the machamism of the BaTiO3 slip rheological, and the mechanical behavior, further the thermocompression ability of green sheets, finally investigated the pyrolysis behavior of the mixture of binder and plasticizer. In the result of the study, the slurry contained plasticizer exhibited excellent rheological behavior, and homogeneity microstructural in the top, bottom and cross section of the sheet. The green sheets with plasticizer decrease in tensile strength, and increase in elongation and peel force with mylar. The plasticizer-free sheet exhited a typical brittle behavior and had no working ability. The low plasticizion sheets show delaminateion in the stacking processs. Plasticizer would be burned out at its pyrolysis temperature, had no effect in the end of pyrolysis temperature of polymer. The slurry and green sheet contain P2 had good plasticization in the experiment than adding P1 in the same amount.
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