的升溫制度
(1.中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083；
2.平果鋁業(yè)公司， 平果 541004)
摘 要: 采用DTG， DDTA等熱分析手段， 研究了高溫固化、 炭化過程中， 鋁電解用TiB2陰極涂層糊料的質(zhì)量和能量的變化速率， 制定了涂層的變速固化、 炭化升溫制度； 在此基礎(chǔ)上， 研究了升溫制度對TiB2陰極涂層性能的影響。 結(jié)果表明： 變速升溫制度優(yōu)于勻速升溫制度， 采用變速固化、 炭化升溫制度所制備的涂層形變小、無裂紋， 其抗拉強度達(dá)3.13MPa， 電阻率為23.2μΩ·m； 而采用升溫速度為10.3℃/h的勻速固化、炭化升溫制度制備的涂層形變大、 裂紋多， 抗拉強度小（2.69MPa）， 電阻率大（28.6μΩ·m）。
關(guān)鍵字: 升溫制度； 熱分析； TiB2 陰極涂層
CHEN Zhu2, LIN Lin2
（1. School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China;
2. Pingguo Aluminium Company, Pingguo 541004, China）
Abstract:The mass and energy change speed of the TiB2 coating paste for aluminum electrolysis during its solidification and carbonization process was studied by the DTG and DDTA, and a reasonable heating program of solidification and carbonization was established. On this basis, the effect of heating program on the properties of TiB2 cathode coating was investigated. Results show that the heating program of variable speed is better than heating programs of invariable speed. The TiB2 cathode coating prepared by the established heating program possesses excellent properties, such as little deformation, no pores and fissure, great tensile strength of 3.13MPa, good electrical resistivity of 23.2μΩ·m. Contrary, the coating prepared by the heating programs of invariable speed has more deformation, some pores and fissure, tensile strength of 2.69MPa, electrical resistivity of 28.6μΩ·m.
Key words: heating program; thermal analysis; TiB2 cathode coating
