Sintering Ceramics at Room Temperature using Phase-Changing Additives

使用相变添加剂在室温下烧结陶瓷

• 批准号: EP/X019055/1
• 负责人: Claire Dancer
• 金额: $ 25.59万
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX019055%2F1
• 关键词: Sintering; Ceramics; Room; Temperature; using

Up to 90% of the energy used over the lifetime of a ceramic component is consumed during manufacturing. The very high temperatures used are by far the biggest barrier to the wider use of ceramic materials, despite their suitability for use in a wide range of applications including solid-state batteries and other devices. In this project we will attempt to eliminate the need for heating to densify ceramic materials. We will start with pellets pressed from highly pure ceramic powders to which we will add very carefully controlled amounts of "phase-changing additive" substances which convert to metals at relatively low temperatures. This will provide us with a way to input energy by connecting the material to a power supply which will preferentially heat the surfaces of the particles where these substances are placed. We hypothesize that this will lead to intense heating in this region locally, enabling sintering to occur without needing to raise the temperature of the entire sample. This paradigm-shifting idea would radically reduce energy consumption in the ceramics industry and enable co-processing of ceramics with other materials which would usually degrade at the high temperatures of conventional ceramic processing methods. This work, if successful, will enable better manufacturing routes for important technological applications including solid-state batteries and ceramic-based metalized metamaterials for use in imaging and communication. In this project we propose several methods to investigate whether our hypothesis is correct and whether the effects we propose can be sufficiently controlled to lead to extensive densification. We will also investigate how universal the effects are by substituting materials with different ionic, electrical, and thermal conductivities. The project will also involve extensive work to characterise the samples produced using a wide range of imaging, X-ray spectroscopy, and bulk property measurement methods.

在陶瓷部件的使用寿命中，高达90%的能源消耗在制造过程中。迄今为止，使用的非常高的温度是陶瓷材料更广泛使用的最大障碍，尽管它们适用于包括固态电池和其他设备在内的广泛应用。在这个项目中，我们将试图消除加热致密陶瓷材料的需要。我们将从高纯度陶瓷粉末压制的颗粒开始，我们将非常小心地控制数量的“相变添加剂”物质，这些物质在相对较低的温度下转化为金属。这将为我们提供一种通过将材料连接到电源来输入能量的方法，该电源将优先加热放置这些物质的颗粒表面。我们假设这将导致该区域局部的强烈加热，从而使烧结发生而无需提高整个样品的温度。这种范式转变的想法将从根本上减少陶瓷工业的能源消耗，并使陶瓷与其他材料的共处理成为可能，这些材料通常会在传统陶瓷加工方法的高温下降解。这项工作如果成功，将为重要的技术应用提供更好的制造路线，包括固态电池和用于成像和通信的陶瓷基金属化超材料。在这个项目中，我们提出了几种方法来研究我们的假设是否正确，以及我们提出的影响是否可以得到充分的控制，从而导致广泛的致密化。我们还将通过替代具有不同离子、电导率和热导率的材料来研究这些效应的普遍性。该项目还将涉及广泛的工作，以验证使用广泛的成像，X射线光谱学和散装性能测量方法生产的样品。