Pore Control of Porous Insulation Ceramics for Building Materials Fabricated by in-situ Solidification Method

陶瓷材料和工艺的发展不仅应能够减轻这种环境问题，而且还应提供产生的废物的回收系统。开发多孔陶瓷作为外墙建筑材料将使瓷砖不仅具有轻质性，而且具有绝缘、可加工性和吸声性等其他功能。研究了利用废旧材料凝胶铸造制备多孔陶瓷的性能。利用废旧资源进行胶铸，对无限循环系统的发展大有裨益。通过凝胶铸造，简化了建筑材料制造中复杂的方法。这是因为传统的凝胶浇注系统是神经毒素，在氧气环境下容易脱落。使用天然凝胶成型剂，可以最大限度地减少传统凝胶铸造的障碍，并允许在环境条件下进行多孔成型。使用日本明胶作为胶凝剂，可以在环境气氛下形成机械发泡的载废浆料。这一过程也允许开发无限循环系统的废物资源，以生产具有特色的陶瓷材料。与市售多孔陶瓷相比，从废物中提取的多孔陶瓷是潜在的隔音材料，其优越的吸声剖面描述了这一点。来自废物的多孔材料是良好的隔热材料，提供凉爽和通风。此外，废弃物的凝胶浇筑为土壤结构的合成提供了可能。中空颗粒有望作为多孔陶瓷的材料。开发了无机中空颗粒的合成新工艺。以气泡为模板制备空心碳酸钙颗粒的新工艺，将CO2/N2混合气体鼓泡到CaCl2中，成功制备了空心碳酸钙颗粒。

Ceramic materials and processes should be developed capable not only in alleviating such environmental issues, but also providing a recycling system of generated waste. Developing a porous ceramics as outside construction materials will provide the ceramic tile not only lightness, but also other functions such as insulation, machinability and sound absorbability. In this study, the properties of the porous ceramics fabricated by gelcasting using waste resources were investigated. The gelcasting using waste resources has great benefit for the development of endless recycling system. Through gelcasting, the complex methods in the usual fabrication of construction materials are being simplified.This is because the conventional gelcasting system is neuro-toxin and suffered exfoliation under O2 atmosphere. With natural gel forming agent, the impediments of traditional gelcasting are being minimized and allows the porous shaping under ambient condition. The use of Japanese gelatine, as a gelling agent, enabled the setting of mechanically foamed waste-loaded slurry under ambient atmosphere. This process also allows a development of endless recycling system of waste resources to produce ceramic materials with characteristics. The porous ceramics from waste are potential sound insulator as depicted in their superior sound absorption profile upon comparison with commercially available porous ceramics. Porous materials from waste are good thermal insulators that provide coolness and ventilation. Moreover, gelcasting of waste resources offers the possibility of synthesizing the soil structure.Hollow particles are expected as material of porous ceramics. New synthesis process of inorganic hollow particles was developed. This new process to prepare hollow calcium carbonate particles uses bubbles as templates, and successfully prepared hollow calcium carbonate particles by bubbling CO2/N2 mixed gas into CaCl2.