Phase Diagram Estimation of the Al_2O_3-SiO_2-Re_2O_3 Systems

来源 :Journal of Shanghai University | 被引量 : 0次 | 上传用户:nayinian2688
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Nine limiting binaries of Al 2O 3 SiO 2 Re 2O 3 (Re=Nd,Sm,Gd and La) system are assessed. The binary diagrams or experimental information from Toropov, Mizuno, Aramaki, Bondar, Rolin and Coutures are optimized with the substitutional model of Kaufman and Nesor and the approximate formula of fusion free energy for rare earth element oxides of Wu and Pelton. The extracted Gibbs free energies of pure solid oxides and stoichiometric phases and the solution parameters are used to estimate the corresponding binaries, liquidus surfaces and a series of isothermal sections of four ternaries Al 2O 3 SiO 2 Nd 2O 3, Al 2O 3 SiO 2 Sm 2O 3, Al 2O 3 SiO 2 Gd 2O 3, and Al 2O 3 SiO 2 La 2O 3. In the Al 2O 3 SiO 2 Gd 2O 3 system samples as fired at exact temperature with different compositions were analyzed by X ray diffractometer and the detected results are fitted with the calculation of isothermal sections. The binary diagrams or experimental information from Toropov, Mizuno, Aramaki, Bondar, Rolin and Coutures are optimized with the degree of substitutional model of Kaufman and Nesor and the approximate formula of fusion free energy for rare earth element oxides of Wu and Pelton. The extracted Gibbs free energies of pure solid oxides and stoichiometric phases and the solution parameters are used to estimate the corresponding binaries, liquidus surfaces and a series of isothermal sections of four ternaries Al 2O 3 SiO 2 Nd 2 O 3, Al 2O 3 SiO 2 Sm 2O 3, Al 2O 3 SiO 2 Gd 2O 3, and Al 2 O 3 SiO 2 La 2 O 3 In the Al 2 O 3 SiO 2 Gd 2 O 3 system samples as fired at exact temperature with different compositions were analyzed by X ray diffractometer and the detected results are fitted with the calculation of isothermal sections.
其他文献
目的:建立草麻黄药材的近红外漫反射光谱高通量分析方法.方法:测量草麻黄样品的近红外漫反射光谱(near infra red diffuse reflectance spectra,NIRDRS),应用化学计量学技术进行光谱处理和数据预处理,分别建立并验证草麻黄药材的产地和采摘时间判别对向传播人工神经网络(counter-propagation artificial neural network,C
鸡西矿业集团公司张辰煤矿西三采区3
期刊
采用温度加速实验恒温法预测益肤霜软膏中红霉素的稳定性。用HPLC法测定含量,以Arrhenius指数定律进行计算,红霉素的降解规律符合一级动力学,预测红霉素在25℃时的t0.9为1.3年。红霉素的平均回收率为97.3% (RSD=
新课程理念不仅要求学生学习基础的记忆知识,更应学习及掌握探索与处理问题的方式与途径.探究数学课堂的教学模式,教师应充分发挥主导作用,将把学生思维引入正轨.
期刊
本文研究了12名男性健康志愿者单剂口服国产和进口盐酸索他洛尔片剂160mg的药代动力学和相对生物利用度。按照随机、交叉试验设计,采集服药后0.5,1.0,1.5,2,3,4,6,8,12,24,36,48h的血样本。HPLC方法测定索他洛尔的血药浓度。
高中语文教材经多次修改,集中了现当代的优秀篇章,选取了世界文学名家精品,愈见典范。文章,以书面语言记人叙事、说理抒情,进而拨动人的心弦,引起人的共鸣,启发人的联想;插图
武汉山河在,湖湘故人来。——题记打小跟着爷爷奶奶生活——在那个民风淳朴的地方,在那个鱼米齐飞的地方,在那个跨过小河便及湖鄂的地方。自诣故人实不为过,便也就念想着武汉
我国首台十五辊变辊距大型板材矫正机,在太原重工股份有限公司进行了总装、调试和空负荷试车,经检测满足了合同和技术协议的要求,其技术水平达到了当代国际先进水平。 太原钢铁(
目的探讨老年患者院内感染的危险因素以及预防对策。方法 调查某医院老年住院患者560例,对60例发生院内感染患者临床资料进行调查,分析院内感染的危险因素。结果某医院院内
进入1月份后,国内橡胶资源高水平增长,消费需求较为旺盛,供求基本平衡。在若干利好因素的支持下,天然胶价格触低反弹,但合成胶仍有下滑。一、新增资源高幅增长据初步统计和测算,1月份