Doi Y, Koda T, Adachi M, Wakamatsu N, Goto T, Kamemizu H, Moriwaki Y, Suwa Y
Department of Dental Materials and Technology, School of Dentistry, Asahi University, Gifu, Japan.
J Biomed Mater Res. 1995 Nov;29(11):1451-7. doi: 10.1002/jbm.820291117.
Gas chromatography was employed to quasi-continuously determine the amount of carbon dioxide that evolved from carbonate apatite specimens during sintering. Assuming that the carbonate in the specimens decomposed to carbon dioxide on a mole-for-mole basis, the determination of the carbon dioxide evolved allowed for the determination of the amount of carbonate that remained in the specimens during different stages of sintering. Previously, this measurement could be carried out only after sintering was completed. Comparison of data obtained from specimens compacted isostatically at 600 MPa for sintering with powder specimens indicated that the amount of carbonate remaining in the sintered apatite mass strongly depended on heating rates, heating temperatures, and holding-time intervals.
采用气相色谱法准连续测定碳酸盐磷灰石样品在烧结过程中释放出的二氧化碳量。假设样品中的碳酸盐按摩尔比分解为二氧化碳，通过测定释放出的二氧化碳量，可确定在烧结的不同阶段样品中残留的碳酸盐量。此前，该测量只能在烧结完成后进行。对在600MPa下等静压压实的烧结样品与粉末样品的数据比较表明，烧结磷灰石块体中残留的碳酸盐量强烈依赖于加热速率、加热温度和保温时间间隔。
