微晶玻璃新材料

本文简介了几种近年来新开发的微晶玻璃新材料,如高强度、高韧性微晶玻璃,表面高压缩增强微晶玻璃,纤维增强微晶玻璃复合材料,氟云母微晶玻璃柔性无机膜,发光透明微晶玻璃,核废料固化用微晶玻璃,生体修补用微晶玻璃及微晶玻璃建筑材料等.     

烧结法制微晶玻璃的机理研究

微晶玻璃是近些年来在材料科学上的一项重大发现,在国防尖端技术和建筑业等多种领域起到了举足轻重的作用。微晶玻璃更具有高机械强度、绝缘性和良好的耐酸耐碱性等优点,本文通过烧结法就微晶玻璃的材料特征、微观结构和性能、降低烧结温度的方法等做了详细的介绍。     

微晶泡沫玻璃与固体废弃物的循环利用

概述了微晶泡沫玻璃的制备工艺原理及流程,从结构方面讨论了微晶泡沫玻璃的性能及应用,介绍了废玻璃、粉煤灰、尾矿、冶炼渣、硼泥、煤矸石、陶瓷废料等固体废弃物在微晶泡沫玻璃中的应用。     

微晶玻璃结构材料的制备及相关增韧方法的研究进展

微晶玻璃具有的热稳定性好、机械强度高、耐磨、耐腐蚀性好等特性使其成为理想的结构材料而被广泛使用,断裂韧性的提高无疑将极大地拓宽微晶玻璃在各个领域的应用。笔者介绍了所使用原料、制备工艺、热处理制度等对微晶玻璃韧性的影响关系,归纳了影响微晶玻璃裂纹扩展及断裂韧性的相关因素,同时讨论了提高微晶玻璃韧性的措施或手段。     

建筑装饰用微晶玻璃"十三五"发展状况

微晶玻璃是一种含有大量微晶相的玻璃固体材料,具有较好的机械性能、化学稳定性、耐久性和表面光洁度等特点.由于微晶玻璃存在诸多优点,可以应用在多个领域."十三五"时期中国微晶玻璃的发展主要体现在三个方面,一是专利申请数量达到全球总量的一半,二是实现了浮法工艺生产技术,三是JC/T 872—2019《建筑装饰用微晶玻璃》标准的发布和实施.本文主要从专利技术、生产工艺和标准方面对建筑装饰用微晶玻璃的发展情况进行分析.     

高致密性微晶玻璃的生产研究

本文提供一种低气孔率高致密性微晶玻璃的生产工艺技术,即在布料时加入一些特殊成分的微晶玻璃粒料混合,然后通过烧结、析晶制成微晶玻璃。利用这种方法生产的微晶玻璃具有致密度高、气孔率低、平面度好、花色品种及形状可设计性良好等优点,扩大了微晶玻璃的使用范围。     

结构型微晶玻璃的制备及其耐腐蚀性研究进展

微晶玻璃具有的热稳定性强、机械强度高、耐磨、耐腐蚀性好等特性使其成为理想的结构材料而广泛使用,而其中微晶玻璃具有的良好化学稳定性使其成为理想的耐腐蚀性材料。介绍了使用氧化物的种类和制备工艺等对微晶玻璃腐蚀特性的影响关系,归纳了影响微晶玻璃腐蚀行为或腐蚀效果的相关因素,同时阐述了提高微晶玻璃耐腐蚀性的措施或手段。     

问:什么叫微晶玻璃复合砖?

<正>答:微晶玻璃复合砖是以陶瓷材料为基体,在特定工艺条件下,将微晶玻璃复合在陶瓷基体上的新型高档建筑装饰材料。由于微晶玻璃比陶瓷更具有优异性能,如色泽纯净、质感强、不吸水、防污染、易清洁等,因此,在国内高端消费市场和国际市场上极受欢迎,市场发展空间极大。1微晶玻璃复合砖技术革新微晶玻璃陶瓷复合砖的诞生,实现了对传统微晶玻璃板材生产突破性的工艺革新,解决了微晶玻璃与陶瓷基体两种不同材质有机结合的技术瓶颈,填补了国内外空白,并用辊道窑实现了规模化生产,降低了能     

一种微晶玻璃的研制过程

本文介绍了微晶玻璃的生产原理及工艺,探讨了利用压延法生产微晶玻璃的成分范围、主晶相的选择及晶核剂的选择和使用等问题,获得了一种可以工业化生产的微晶玻璃配方,较全面地介绍了微晶玻璃的研制过程.     

环保型低熔封接微晶玻璃研究现状及发展方向

低熔封接微晶玻璃是一种先进的焊接材料,熔化温度和封接温度低,机械强度优良,化学稳定性好,因而在很多领域得到广泛应用.目前,很多商业封接玻璃都含有铅、镉、汞、铊等危害环境和人体健康的物质.在环保意识越来越强的今天,应积极进行无重金属封接微晶玻璃的研究与开发.综述了封接微晶玻璃无铅化的必要性,介绍了无铅低熔封接微晶玻璃的特点,探讨了影响玻璃封接性能的因素,展望了封接微晶玻璃今后的研究方向.     

远红外辐射及负离子释放功能微晶玻璃研究

以粉煤灰为主要原料,将电气石直接掺入,采用烧结法制备微晶玻璃,分析了电气石掺入量对微晶玻璃样品的密度、显微强度、弯曲强度、吸水率、耐酸耐碱性、远红外辐射率和负离子释放量的影响,采用XRD对该种微晶玻璃的微观结构进行了研究。结果表明,随着电气石掺入量的增加,微晶玻璃的密度、显微硬度、弯曲强度和耐碱酸性稍微下降,吸水率略增大,远红外辐射率和负离子释放量都随着电气石掺量增加而增大。     

微晶陶瓷的制备技术、性能及用途

微晶陶瓷是由玻璃原位析晶而获得的一种结构均匀、致密,晶粒尺寸为纳米或亚微米级的高技术新型陶瓷材料。它具有极好的耐磨损和耐腐蚀性,而且力学、热学、电学性能优良,已成为陶瓷新材料、新技术的研究和应用热点之一。本文介绍了熔融法、烧结法、熔胶--凝胶法和强韧化法等制备微晶陶瓷的工艺和技术,综述了微晶陶瓷的性能和用途。     

Matching correlation study of titanium-based ceramics with glass based on dissolution characteristics

Glass-ceramics are ideal candidates in Low-temperature Cofired Ceramic (LTCC) technology. The “dissolution-precipitation” mechanism ensures the sintering compactness of glass-ceramics at low temperatures. The ceramics must be dissolved and precipitated in the liquid phase with the assistance of glass additives. In this case, the characterization of dissolution behaviors that should be highly valued has rarely been emphasized. This study puts forward a simple, repeatable, and efficient design for characterizing the dissolution behaviors of several titanium-based ceramics in glass frits under variable temperature conditions. Interestingly, a glass frit with good wettability does not ensure the low-temperature sintering process of a ceramic matrix. In contrast, the dissolution characteristics of ceramics in the glass should be seriously considered. Hopefully, the study of dissolution behaviors could strengthen the fundamental understanding of the low-temperature sintering of ceramics and offer a glass-ceramic design strategy for developing high-performance.     

Waste derived glass ceramic composites prepared by low temperature sintering/sinter-crystallisation

Glass-ceramics based on iron rich wastes were produced by direct sintering and by following an innovative approach, combining direct sintering and sinter-crystallisation processes. According to the second method, a layered tile was manufactured by single firing at 900°C using a selected combination of wastes for both the porous body and the dense coating layer. The coating layer (‘glaze’) results from the sinter-crystallisation of a waste derived glass mixed with zircon and recycled borosilicate glass. The glaze sealed the porosity of the body and enhanced both mechanical properties and chemical stability. The results show a near to zero water absorption rate, despite a low geometric density (～2?g?cm^??3), accompanied by a Young's modulus of ～40?GPa and a bending strength of ～30?MPa. The chemical stability of the glass-ceramics thus developed was assessed by the application of a toxicity control leaching procedure. Furthermore, cell culture tests were carried out to evaluate the potential cytotoxicity of the materials.     

热处理温度对矿渣微晶玻璃显微结构及耐腐蚀性的影响研究

以白云鄂博二次选后尾矿和粉煤灰为主要原料,采用熔融法制备微晶玻璃材料。通过DTA、XRD、SEM测试手段研究了热处理温度对微晶玻璃的显微结构及耐腐蚀性能的影响。研究表明:显微结构是影响微晶玻璃耐酸碱性能的主要因素。在860℃进行热处理时,普通辉石相细小晶粒均匀分布于基体玻璃中,耐酸碱性能最优,其中耐酸性99.8%,耐碱性99.7%,随着热处理温度的升高,微晶玻璃材料的耐酸碱性能均有一定提高,并且耐酸性高于耐碱性;均高于铸石制品,是良好的工业耐腐蚀材料。     

锂铝硅系微晶玻璃研究与应用现状

微晶玻璃诸多功能使其在现代社会各行各业发挥的作用越来越大，应用领域也越来越广。其中的锂铝硅体系是最具研究价值的微晶玻璃体系之一，其低膨胀、高热稳定及优良的机械性能使之成为一种不可或缺的综合材料。本文对锂铝硅系的微晶玻璃的结构特征和主要形态进行了说明，就目前研究和应用现状作了简单的阐述。     

Rapid synthesis of Gd2Zr2O7 glass-ceramics using spark plasma sintering

Glass-ceramics are possible host matrix for high level waste immobilization. The Gd₂Zr₂O₇ glass-ceramic matrix was successfully synthesized using spark plasma sintering (SPS) method in 5 minutes. The phase transition with sintering temperature was studied using X-ray diffraction, Raman and transmission electron microscopy. It revealed that samples kept a main defected fluorite phase as being sintered below 1800°C. Glass phase increased rapidly beyond 1850°C. The amorphous structure became the main body at 1900°C, with nanoscale crystal scattered in the bulk. With the increase of glass phase, the grain boundary became almost indistinguishable. The relationship between the final phase of Gd₂Zr₂O₇ with its synthetic temperature range and corresponding technology was reviewed. Gd₂Zr₂O₇ glass-ceramics could be acquired by extending the sintering temperature beyond 1850°C using SPS method.     

用工业废渣赤泥研制微晶玻璃

本研究利用山东铝业公司固体废弃物赤泥、粉煤灰、煤矸石等为主要原料,制备了装饰材料用微晶玻璃。探讨了微晶玻璃的热处理工艺制度及晶核剂对核化、晶化的影响。采用TG-DTA、XRD、SEM等测试技术测试了样品的理化性能和微观结构。     

提高微晶玻璃陶瓷复合板硬度的途径

微晶玻璃陶瓷复合板具有良好的装饰效果,但是其微晶玻璃面层的硬度较低,不适合大面积铺贴地面.笔者分析了微晶玻璃与硬度的关系,并提出了相应的对策:即提高微晶玻璃中晶相的硬度,提高微晶玻璃中玻璃相的硬度,选择合理的烧成制度.     

Effect of hexagonal-BN additions on the sliding-wear resistance of fine-grained α-SiC densified with Y3Al5O12 liquid phase by spark-plasma sintering

The effect of flaky hexagonal (h) BN additions (1, 5, and 10 vol.%) on the lubricated sliding-wear behavior of fine-grained, liquid-phase-sintered SiC ceramics fabricated by spark-plasma sintering was investigated. It was found that resistance to the initial mild, deformation-controlled wear decreases with increasing h-BN content in the composite, which progressively exhibits a greater wear rate and a sooner transition to severe wear. This is because the softer h-BN particles reduce the hardness and do not act as internal lubricant, while promoting poorer grain cohesion due to their morphologically-favored segregation at grain boundaries. By contrast, their addition is increasingly beneficial in terms of resistance to the subsequent severe, fracture-controlled wear upon prolonged sliding contact, with a lower wear rate. This is because the flaky h-BN particles increase the fracture toughness, and also act efficiently as external lubricant when pulled-out from the microstructure. Finally, implications for the design of advanced triboceramics are discussed.