仿花岗岩微晶玻璃的制造及技术关键的探讨--仿花岗岩微晶玻璃的制造工艺

绪言 本世纪60年代后期,微晶玻璃的研究取得突破性进展,各种具优异性能的微晶玻璃制品开始工业化生产,一些国家的科研专家开始研究开发微晶玻璃饰面材料,如前苏联开发成功的"矿渣微晶玻璃",捷克斯洛伐克以玄武岩作原料生产的"人造玄武岩"和美国开发成功的"人造蛋白石"等等.所有这些制品其理化性能都远优于天然石材,但没有天然石材那漂亮的外观花纹,很难作为天然石材的理想替代品.     

用于手机的仿羊脂玉微晶玻璃

阐述了产自新疆和田羊脂玉的特性。介绍了仿羊脂玉微晶玻璃的性质和制造工艺。仿羊脂玉微晶玻璃具有相似羊脂玉的颜色、光泽、硬度和透明度,而且其强度和抗摔性高于羊脂玉,因此将仿羊脂玉微晶玻璃用于奢华手机可显示手机的靘丽和高贵,今后有应用前景。     

仿软玉的琉璃成分

远在中国西周朝代就己开始用琉璃来仿玉,当时琉璃为铅钡硅酸盐成分,加入磷酸盐为乳浊剂,到了唐朝开始用萤石进行乳浊,以后采用的乳浊剂更是多种多样。现代的仿软玉琉璃要达到软玉的白度、光泽度和半透明性质,需要使用氟化物、磷酸盐、硫酸盐和氯化物多种乳浊剂进行乳浊,同时必需采用合适的熔化温度制度和热处理工艺。     

仿珠宝玻璃的制造

综述仿珠宝玻璃,如仿珍珠、仿钻石、仿水晶、仿紫晶、仿红宝石、仿蓝宝石、仿翡翠、仿玉、仿猫眼石等的成分和制造工艺(成形、切割、研磨、抛光、镀膜)。讨论了仿珠宝玻璃的发展方向。     

组成与工艺条件的交互作用对烧结微晶玻璃性能影响的研究

本文利用逐步回归分析所得的回归方程,通过等值趋势分析,探讨了组成及工艺条件对含ZnO、Na2O的CaO-Al2O3-SiO2系统烧结微晶玻璃的强度的交互作用,为该系统烧结微晶玻璃的组成设计及工艺条件的选择提供了依据.     

光敏微晶玻璃新材料的制备方法

本文介绍光敏微晶玻璃新材料的制备方法，产品、性能及应用。     

矿渣微晶玻璃砖的研制

本文研究了矿渣微晶玻璃砖的配方及其制造工艺,以高炉矿渣,玻璃粉为主要原料,采用ＴｉＯ２为成核剂,获得一种具有较低溶制温度,易实现微晶化且材料性能良好的矿渣微晶玻璃,该材料以镁方柱石,铝酸三钙,斜顽辉石为主晶相,配料中矿渣和玻璃粉用量高于７０％。     

硅碱钙石微晶玻璃可加工机理的有限元分析

通过将硅碱钙石微晶玻璃的钻削加工过程模型化为两个步骤,采用有限元分析的方法对其可加工机理进行了理论研究,发现该材料在钻头刃锋作用下,最大应力的方向出现在沿着钻头刃锋前进的方向,这就表示沿着刃锋前进的方向,最容易产生微裂纹,从而能使材料有效地被加工而不至于产生破坏性后果。这一情况被视为该材料能够进行常规的机械加工。     

Infrared Transparent Germanate Glass-Ceramics

A new germanate glass-ceramic material in the BaO-Ga₂O₃-GeO₂ system is developed for infrared (IR) dome and window applications. This glass-ceramic material has a grain size of ∼0.2–0.5 μm and is transparent in the 3–5 μm IR region. Glass ceramization results in 40% improvement in hardness, 65% increase in elastic modulus, 116% increase in strength, and 134% increase in fracture toughness over the base glass.     

炉渣微晶玻璃核化机理的研究

采用ＤＴＡ、ＳＴＥＭ、ＥＤＡＸ、ＳＡＥＤ和ＸＲＤ等测试方法，研究了炉用量对ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系统玻璃核化析晶的影响作用，结果表明，在不引入其它核剂的情况下，随着炉渣用量的增加，玻璃的整体析晶程度增强，当炉渣含量为玻璃组成的４０ｗｔ％以上时，炉渣中所含的硫（Ｓ＾２－）能有效地促进玻璃的微晶化，选择适当的炉渣用量和热处理温度可获得性能优良的微晶玻璃材料。     

砂壁状建筑涂料性能特征和仿外墙面砖施工技术

从涂膜装饰效果、应用范围、施工方法、生产成本等方面介绍砂壁状建筑涂料的性能特征;从涂料性能的改善与提高、新品种涂料的开发、涂料应用范围的扩展和施工方法的发展等方面介绍砂壁状建筑涂料近年来的发展。仿外墙面砖施工技术是该类涂料施工方法的重要进展。使用这种施工方法得到的涂膜装饰效果极好,该方法工艺简单、易于操作实施,有推广应用价值。     

High-Strength Mica-Containing Glass-Ceramics

Glass-ceramics containing barium–mica in the system Ba_0.5 Mg₃ (Si₃AIO₁₀)F₂–2MgO · 2Al₂O₃· 5SiO₂–Ca₃ (PO₄)₂ are two to three times stronger than conventional mica-containing glass-ceramics. Moreover, the barium-mica glass-ceramics are easier to machine, as confirmed by a drilling test using conventional steel tools. Such mechanical properties are attributable to the microstructure of the barium–mica glass-ceramics. Very fine, interlocking mica crystals are precipitated in the glass, and a crack-deflection mechanism is observed by scanning electron microscopy.     

Long-Lasting Phosphorescence of Transparent Surface-Crystallized Glass-Ceramics

Transparent surface-crystallized glass-ceramics with molar compositions of 43SiO₂–2B₂O₃–30SrO–25MgO–0.05Eu₂O₃–0.8Dy₂O₃ (sample GC-A) and 43SiO₂–2B₂O₃–24SrO–6CaO–25MgO–0.05Eu₂O₃–0.8Dy₂O₃ (sample GC-B) were prepared by heat-treating the mother glasses at 850°C for 10 h. The precipitated phases in both glass-ceramics were (Sr_{1− x} Ca _x )₂MgSi₂O₇, in which Eu²⁺ and Dy³⁺ ions were incorporated. Phosphorescence with emission peaks at 470 and 480 nm that is due to the 4 f ⁶5 d –4 f ⁷ transition of Eu²⁺ ions was observed from samples GC-A and GC-B, respectively. The phosphorescence lasted for >5 h at room temperature.     

Bioactivity of Zirconia-Toughened Glass-Ceramics

Bioactivity of zirconia-toughened glass-ceramic composites was evaluated by their surface reaction in simulated body fluid and the bonding strength to living bone. The composite containing 30 vol% zirconia showed high bioactivity, whereas that containing 50 vol% zirconia, extremely low. TEM observation indicated that Ca in the glass-ceramic particles reacted with the zirconia during sintering. It was found that the decrease in Ca in the particles degraded the bioactivity of the composite. In this study, the optimum composition was determined for high-strength and bioactive ceramic.     

仿铜金属光泽釉的研制

本文介绍仿铜金属光泽釉的研制过程，并对其影响因素加以讨论。