釹鐵硼(NdFeB)是目前磁性最強的永磁材料，應用十分廣泛。而3D列印亦為近年來蓬勃發展的技術，其擁有快速成型與高度客製化的特性，減少在製作材料上的浪費。如何將兩者結合應用成為了大家研究的方向，目前應用像是低溫成形的FDM(Fused Deposition Modeling)以及高溫成型的SLM(Selective Laser Melting)，但是目前卻沒有一個方法能在低溫下印製出緻密的樣品。而近期Pennsylvania State University研究團隊建立了一個新的燒結途徑-冷燒結工藝(Cold Sintering Process)，在低於200°C的低溫環境下成功地燒結出緻密的固體，因此如何利用冷燒結工藝應用在3D列印技術成為了本論文最終的目標。
本論文將應用低溫燒結工藝的概念對NdFeB材料進行特性分析。首先找出適合的添加劑，再分別對MQP-S11-9與MQU-F兩種型號的NdFeB粉末進行研究分析。
對MQP-S11-9粉末的研究主要分成兩大部分，第一部份利用熱壓機調整溫度與壓力等參數使得樣品緻密，由實驗得知，MQP-S11-9粉末在燒結溫度150°C，壓力20 MPa持壓30分鐘後，量測出的密度為6.0707 g/cm3，相對於理論密度為81%，第二部份利用微波退火的方式使樣品獲得更好的磁特性，在氬氣環境中經過頻率2.45 GHz，功率200瓦特微波10分鐘至500瓦特微波30分鐘的二段微波退火後能獲得最好的磁特性，樣品的最大磁能積能到達8.655 MGsOe。
MQU-F粉末的研究著重在如何在更低的壓力下獲得有良好磁特性的樣品，以便於利用在3D列印技術上，由實驗得知，MQU-F粉末在燒結溫度150℃，壓力在3 MPa持壓30分鐘後，量測出的密度為5.4155 g/cm3，相對於理論密度為72%，再進一步經過頻率2.45 GHz，功率200瓦特微波10分鐘至500瓦特微波30分鐘的二段微波退火後，樣品的最大磁能積能到達10.634 MGsOe。

NdFeB is the most magnetic permanent magnet material at present, which is widely used. 3D printing is also a technology that has flourished in recent years. Its rapid prototyping and highly customizable features have broken through the limitations of the traditional three-dimensional model production process and reduced the waste of materials and costs. Therefore, how to combine the above two has become the direction of research.
The current application is like FDM (Fused Deposition Modeling) and SLM (Selective Laser Melting), but there is no way to print the dense sample at low temperature. Recently, the Pennsylvania State University research team has established a new sintering process, the Cold Sintering Process, which successfully sinters dense solids in a low temperature environment below 200°C, so how to use cold sintering process for 3D Printing technology has become the ultimate goal of this paper.
This paper will apply the concept of low temperature sintering process to the characteristics analysis of NdFeB materials. Firstly, find the suitable additives, and analyze the two types of NdFeB powders of MQP-S11-9 and MQU-F.
The research of MQP-S11-9 powder is mainly divided into two parts. The first part uses the hot press to adjust the parameters such as temperature and pressure to make the sample dense. The result shows that after the sintering temperature at 150°C and the pressure of 20 MPa for 30 minutes, the bulk has the density of 6.0707 g/cm3 which is 81% relative to the theoretical density. The second part uses microwave annealing to obtain better magnetic properties of the sample in an argon atmosphere. After the two-stage microwave annealing at the frequency of 2.45 GHz, power from 200 W for 10 minutes to 500 W for 30 minutes, the best magnetic properties can be obtained, and the maximum magnetic energy product of the sample can reach 8.655 MGsOe.
The research of MQU-F powder focuses on how to obtain samples with great magnetic properties at lower pressure, so as to apply to the 3D printing technology. It is known from experiments that the MQU-F powder has the measured density of 5.4155 g /cm3 at the sintering temperature of 150°C and the pressure of 3 MPa for 30 minutes, which is 72% relative to the theoretical density. Then, after the two-stage microwave annealing of the frequency of 2.45 GHz, power from 200 W for 10 minutes to 500 W for 30 minutes, the maximum magnetic energy product of the sample reaches 10.634 MGsOe.

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