2005-08-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/689876摘要：奈米陶瓷的燒結機制非常複雜，傳統的燒結理論完全無法用來分析或預測燒結的結果。雖然奈米陶瓷塊材具有優異的材料性質，例如：在低溫下的超塑性、防菌自潔性質等，但是要實際製造出成品卻不簡單，為了達到緻密化且維持在奈米粒徑的條件，常會使用加壓或添加抑制劑等輔助方法，更增添掌握燒結機制之困難。 我們近幾年由一般動力學所推導而得的「二維主導曲線模型」，已證實可以用來分析從微米至奈米級陶瓷粉末之常壓燒結，且比由全期燒結模型為基礎所發展出的「主導燒結曲線模型」更能準確估計視燒結活化能及準確預測燒結體的密度變化。在各種初步結果中我們更訝異的發現由不同粒徑的陶瓷粉末燒結所得到的「視燒結活化能」會與粉末「平均粒徑的對數值」成完美的線性關係。本計劃提議深入探討這個非常令人驚異的結果，首先擴大所分析的粒徑範圍與樣本數量以確定兩者間之線性關係，然後應用「三維主導曲面」找出與其他變數間的關係，最後希望由此探討奈米陶瓷粉末的燒結機制。<br> Abstract: The sintering behaviors of nanocrystalline ceramics cannot be analyzed, described or predicted by conventional sintering models due to their presumably complicated mechanisms. As a result, although nanoceramics own a number of extraordinary properties, such as: superplasticity, bacteria-free surface, and self-cleaning ability, etc., it is very difficult to control and sinter nanoceramic powders into a bulk material. Furthermore, in order to achieve fully dense sample while maintain the nanoparticles sizes, we usually adopt high pressure or add inhibitors in the process, making it more difficult to understand the sintering mechanisms. A two-dimension master curve model (MCM) developed by us during the past few years had been proved very effective in the analysis of micron and nanocrystalline ceramic sintering. The MCM is more accurate and easier in the prediction of sintering process than the previous master sintering curve model (MSC). During the analysis, we were surprised to find that the apparent sintering activation energy has a linear relationship with the logarithm of grain sizes. To investigate the unexpected relationship, we propose to further expand the range and quantities of the experiments, and to explore the possible sintering mechanisms of nanoceramics.奈米陶瓷燒結燒結機制主導曲線主導曲面nanoceramicssinteringsintering mechanismsmaster curvemaster surface.