Process Engineering for Advanced Chemically Bonded Ceramics (CBC)

先进化学结合陶瓷 (CBC) 的工艺工程

• 批准号: RGPIN-2019-03898
• 负责人: Troczynski, Tom
• 金额: $ 2.4万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=737230
• 关键词: Process; Engineering; Advanced; Chemically; Bonded

We aim to achieve room- or near-room T processed low-cost, low-CO2 emission Chemically Bonded Ceramics CBC with high-T (> 1000°C) 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 (>1000°C) resistant ceramics obtained in a low-T (<100°C) 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.

我们的目标是实现室温或近室温处理的低成本、低二氧化碳排放的化学键合陶瓷 CBC，具有耐高温 (> 1000°C) 和目标离子封装（例如重金属或核废料）特性。  将利用（I）室温或接近室温的加工，以及（II）使用化学反应而不是烧结来获得离子/共价键合材料。正确处理的 CBC 可以在低 T (<100°C) 工艺中获得耐高温 (>1000°C) 陶瓷，因为化学反应 CBC 形成离子/共价键并在高温下经历相变。将研究这些过程的动力学，以确定暴露于高温下的此类 CBC 的耐火性增加速度。由于上述两个基本原理 (I, II) CBC 工艺及其矿物/废料原材料的二氧化碳足迹与 OPC 相比最多可减少 10 倍。具体来说，我们建议在两个主题 1,2 中研究先进的 CBC，用于与环境保护广泛相关的 (A) 结构和 (B) 功能应用： 主题 1：(1A) 结构和 (1B) 功能性酸活化磷硅酸盐水泥的基础和应用研究（博士#1）。长期目标是开发磷酸结合矿物衍生的低成本低碱（Na、K）铝硅酸钙（例如钙长石）的工艺技术，作为（1A）结构OPC的可行替代品和（1B）功能性高温（耐火）陶瓷。 1A 和 1B 之间的重叠允许通过简单的室温工艺获得大量耐高温水泥，用于对火灾敏感的住宅、交通（例如隧道）、工业（例如石化）或军事结构。主题 2：碱激活 (2A) 结构和 (2B) 功能土工聚合物的基础和应用研究 GP（博士#2）。该项目重点关注碱活化偏高岭石和硅铝酸盐粉煤灰等废料的低成本、室温加工，用于 (2A) 旨在一般 OPC 替代的无定形、低二氧化碳足迹 GP 的结构应用，以及 (2B) 微观结构工程、原位沸石结晶 GP 的功能应用，旨在吸收和吸收 保留 Cs、Sr、As 或重金属 Pb、Hg。