实验法探讨瓷胎元素组成和烧成温度对热膨胀法测温的影响

Simulation experiments on the influences of elemental composition and firing temperature of porcelain bodies on the thermal expansion method for temperature measurement

高温技术是我国古陶瓷科技发展史上最重要的技术成就之一,而古陶瓷测温是古陶瓷研究领域中的核心研究内容。热膨胀法具有比较直接和精确判定古陶瓷烧成温度的特点,然尚存在部分标本测量误差较大等问题。鉴于此,本研究充分考虑我国南北方古瓷胎组成配方和结构性能特点,运用实验考古学方法模拟制备具有我国古陶瓷典型瓷胎配方和不同烧结状态的标准参考样,采用热膨胀仪科学化表征瓷胎重烧热膨胀曲线上转折点与其化学组成、烧成温度间的耦合关系,并深入剖析其影响规律及内在机理,同时确立瓷胎化学组成中Al_(2)O_(3)含量和自身烧结状态是影响热膨胀法判定古陶瓷烧成温度准确性和适用性的关键技术参数。本研究有助于科学化认知现有热膨胀测温方法,补充和完善使用热膨胀仪判定古陶瓷烧成温度的方法和理论体系。

The high-temperature firing technology is one of the three major breakthroughs in the history of China’s ceramic development.Therefore,firing temperature measurement for ancient ceramics has long been one of the core features in the field of scientific research on ancient ceramics.However,the existing method systems generally have problems,such as large measurement errors and unclear mechanisms.In view of this,based on the thermal expansion method for temperature measurement,a series of standard samples was prepared by fully considering the differences in composition,structure and properties of ancient porcelain bodies fired in north and south China.The relationship between the“turning point”of the thermal expansion curve of porcelain body and the chemical composition and firing temperature of the body was revealed,and the influencing factors and mechanism of the curve were deeply analyzed.On this basis,the Al_(3)O_(3)content and sintering state itself were determined to be the key technological parameters that affect the temperature measurement using the thermal expansion method.