Process Engineering for Advanced Chemically Bonded Ceramics (CBC)

我们的目标是实现室温或近室T加工的低成本、低二氧化碳排放的化学结合陶瓷CBC，具有高T(&gt；1000C)抗性和定向离子封装(例如重离子封装) 金属或核废料)财产。(I)室温或接近室温 加工，以及(Ii)使用化学反应，而不是烧结，以 实现离子/共价键合材料，将被利用。处理得当 CBC可能导致高T(&gt；1000C) 当化学反应的CBC形成离子/共价键时，在低T(&lt；100C)工艺中获得的电阻陶瓷 并在升高的温度下经历相变。这些过程的动力学将被研究以确定 由于上述两个基本因素，这类CBCs在高温下耐火能力的提高速度 (i、ii)与OPC相比，在CBC工艺及其矿物/废物原材料中，它们的二氧化碳排放量最多可减少10倍。具体地说，我们建议研究(A)结构和(B)功能的高级CBC 广泛与环境有关的应用 保护，分两个主题1，2： 主旋律 1：(1A)结构和(1B)功能酸活化的基础和应用研究 磷硅酸盐水泥(PHD#1)。长期目标 是开发磷酸粘结矿物衍生产品的加工技术， 低成本低碱(Na，K)钙铝硅酸盐(如钙长石)作为(1A)结构OPC的可行替代品，以及(1B)功能性高温(耐火)陶瓷。1A和1B之间的重叠允许 在一个简单的常温工艺中获得大量的高温 耐火住宅、交通运输用耐火水泥 例如隧道)、工业(例如石化)或军事结构。 主旋律 2：碱活化(2A)结构和(2B)功能的基础和应用研究 地球聚合物GP(PHD#2)。其重点是低成本、 碱激发偏高岭石及废渣的常温处理 例如用于(2A)以普通OPC替代为目标的无定形、低二氧化碳足迹GP的结构应用的材料，以及(2B)微结构工程的功能应用， 分子筛原位晶化Gp对Cs，Sr， As，或重金属铅、汞。

We aim to achieve room- or near-room T processed low-cost, low-CO2 emission Chemically Bonded Ceramics CBC with high-T (> 1000C) resistance and targeted ion encapsulation (e.g. heavy metals or nuclear waste) properties. (I) room- or near-room-temperature processing, and (II) use of chemical reactions, rather than sintering, to achieve ionic/covalently bonded materials, will be utilized. Properly processed CBC may lead to high-T (>1000C) resistant ceramics obtained in a low-T (<100C) processes as the chemically reacting CBC form ionic/covalent bond and undergo phase transformations at elevated T. The kinetics of these processes will be studied to determine the speed of fire resistance increase of such CBCs exposed to elevated T. Because of the above two fundamentals (I, II) of CBC processes and their mineral/waste raw materials, their CO2 footprint could be up to 10x smaller as compared to OPC. Specifically, we propose research into advanced CBCs for (A) structural and (B) functional applications broadly related to environmental protection, in two Themes 1,2: Theme 1: Basic and Applied Studies on (1A) Structural and (1B) Functional Acid-Activated Phospho-Silicate Cements (PhD#1). The long-term objective is to develop process technology for phosphoric acid bonded mineral-derived, low-cost low-alkali (Na, K) calcium alumino-silicates (such as anorthite) as (1A) viable replacement of structural OPC, and (1B) functional high-temperature (refractory) ceramics. An overlap between 1A and 1B allows to obtain in a simple, room-temperature process large volumes of high-temperature resistant cements for applications in fire-sensitive residential, transportation (e.g. tunnels), industrial (e.g. petrochemical) or military structures. Theme 2: Basic and Applied Studies on Alkali-Activated (2A) Structural and (2B) Functional Geo-Polymers GP (PhD #2). The is focus on low-cost, room-temperature processing of alkali-activated metakaolinite and waste materials such as aluminosilicate fly-ash for (2A) structural applications of amorphous, low-CO2 footprint GP targeting general OPC replacement, and (2B) functional applications of microstructurally-engineered, in-situ zeolite-crystallized GP targeting absorption and retention of Cs, Sr, As, or heavy metals Pb, Hg.