CAJ | 학술논문

测试了磷石膏和纯石膏的脱水的 TG、DTG、DSC 对比分析二者的脱水特性。结果表明，磷石膏和纯石膏脱水的相似点是脱水都分为两步进行，为吸热反应，产物分别是 CaSO4·0.5H2 O 和 CaSO4；纯石膏脱水的起始反应温度和 DTG 峰值温度都低于磷石膏，失重率都高于磷石膏，说明磷石膏脱水要比纯石膏脱水相对困难一些；纯石膏较磷石膏脱水反应历程短，峰较尖锐，峰值温度略低；特征温度点随升温速率的增加而升高。
측시료린석고화순석고적탈수적 TG、DTG、DSC 대비분석이자적탈수특성。결과표명，린석고화순석고탈수적상사점시탈수도분위량보진행，위흡열반응，산물분별시 CaSO4·0.5H2 O 화 CaSO4；순석고탈수적기시반응온도화 DTG 봉치온도도저우린석고，실중솔도고우린석고，설명린석고탈수요비순석고탈수상대곤난일사；순석고교린석고탈수반응역정단，봉교첨예，봉치온도략저；특정온도점수승온속솔적증가이승고。
The dehydration process of phosphor gypsum and pure gypsum is analysis and research by a Netzsch STA 409 PC simultaneous TG/ DSC instrument. Characteristics of the dehydration process of phos-phor gypsum and pure gypsum was analyzed through the method of comparison. Results show that the de-hydration process of phosphor gypsum and pure gypsum are very similar with two absorption stage,the product are CaSO4 ·0. 5H2 O and CaSO4 the weight loss rate of pure gypsum is greater than that of the phosphorus gypsum,initial reaction temperature and DTG peak temperature of pure gypsum are lower than that of the phosphorus gypsum the dehydration capacity of phosphor gypsum is more difficult than pure gypsum dehydration ability;the dehydration reaction process of pure gypsum is shorter than that of phos-phor gypsum,the peak is sharper and the peak temperature is slightly lower,the peak temperature in the DSC curve increases with heating rate.