In recent decades, talc and kaolinite have been widely used as raw materials for the ceramic industry. In this study, the final characteristics of kaolinitic clay mixed with 6 mass% of magnesite obtained in our previous work were compared with those obtained with mixtures of kaolin (kaolin BIP) and talc (as the source of magnesium oxide). However, different amounts of talc in the kaolin powder were studied, namely 10, 30, and 50 mass% of added talc (with respect to kaolin + talc). The tape casting process was used during this work in order to manufacture the green tapes in an aqueous system with 0.2 mass% of dispersant. Subsequently, the green tapes were heated to 1000 and 1100 °C with a dwelling time of 12 min. The green and sintering tapes were characterized using the following techniques: DTA/TG, X-ray diffraction, porosity, and flexural strength analyses. The results obtained from our previous work indicate that the specimen with 6 mass% of MgCO₃ sintered at 1200 °C for 3 h exhibited the best performances, with high flexural strength and weak porosity value—117 MPa and 27%—respectively. As results from this study, the optimal mechanical and thermal properties of sintering tapes were obtained for the specimen with 10 mass% of added talc sintered at 1100 °C. Indeed, this specimen exhibited 50 MPa and 43% of stress to rupture and apparent porosity, respectively.

中文翻译：

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高岭石-菱镁矿或高岭石-滑石基陶瓷。第二部分：烧结带的微观结构和最终性能

近几十年来，滑石和高岭石已被广泛用作陶瓷工业的原料。在这项研究中，将我们在先前的研究中获得的混合了6质量％菱镁矿的高岭土的最终特性与高岭土（高岭土BIP）和滑石粉（作为氧化镁的来源）的混合物的最终特性进行了比较。但是，研究了高岭土粉末中滑石的不同含量，即添加的滑石的质量百分比为10、30和50（相对于高岭土+滑石）。在这项工作中使用了胶带流延工艺，以便在具有0.2质量％分散剂的水性体系中制造生胶带。随后，将生带加热至1000和1100°C，保持时间为12分钟。使用以下技术对生坯和烧结带进行表征：DTA / TG，X射线衍射，孔隙率，和抗弯强度分析。从我们先前的工作中获得的结果表明，含有6质量％MgCO的样品₃烧结在1200℃下3小时显示出最好的性能，具有高的挠曲强度和弱孔隙度值-117兆帕和27％-respectively。作为这项研究的结果，对于在1100°C下烧结的添加滑石粉质量百分比为10％的样品，获得了最佳的烧结带机械性能和热性能。实际上，该样品分别表现出50 MPa的破裂应力和43％的表观孔隙率。