CAJ | 학술논문

通过TG、IR、XRD等实验手段,研究分析了含乙烯基聚硅氮烷(PSN-1)在0～1000℃范围内热裂解过程的特性.实验表明,PSN-1的热裂解过程可分为三个阶段:第一阶段为0～260℃,该阶段质量损失率较大(48%),主要以小分子挥发为主;第二阶段为260～700℃,该阶段PSN-1中的C=C双键开始发生交联,至500℃已基本交联完全,质量损失率相对较小,至700℃质量损失率为58%;第三阶段700～1000℃.基本上已没有有机基团,完成无机化转变过程.裂解温度及保温时间对Si3N4晶体生成都有影响,提高裂解温度和延长保温时间可以进一步获得数量较多的α-Si3N4晶体.
통과TG、IR、XRD등실험수단,연구분석료함을희기취규담완(PSN-1)재0～1000℃범위내열렬해과정적특성.실험표명,PSN-1적열렬해과정가분위삼개계단:제일계단위0～260℃,해계단질량손실솔교대(48%),주요이소분자휘발위주;제이계단위260～700℃,해계단PSN-1중적C=C쌍건개시발생교련,지500℃이기본교련완전,질량손실솔상대교소,지700℃질량손실솔위58%;제삼계단700～1000℃.기본상이몰유유궤기단,완성무궤화전변과정.렬해온도급보온시간대Si3N4정체생성도유영향,제고렬해온도화연장보온시간가이진일보획득수량교다적α-Si3N4정체.
The characteristics of pyrolytic process of vinyl-containing polysilazane in the temperature range of 0～1000℃ was investigated by TG,IR,and XRD.It was found that the pyrolytic process consisted of three stages.In the first stage (0～260℃) weight loss was about 48%,mainly from volatilization of small molecules ; in the second stage the weight loss was small,the C=C bond began to crosslink and completed by 500℃,the total weight loss was 58% by 700℃; and in the last stage the transformation from organic materials to mineral was accomplished.More α-Si3N4 crystalloids were obtained by increasing the temperature of pyrolytic and extending time of pyrolytic temperature.