Formation Mechanisms of Platelet Sr3Ti2O7 Crystals Synthesized by the Molten Salt Synthesis Method

The molten salt synthesis (MSS) method is utilized to synthesize the anisotropic platelet Sr₃Ti₂O₇ (S3T2) single-crystal particles. The aim of this study is to identify the essence of platelet Sr₃Ti₂O₇ crystal growth and guide the synthesis of anisotropic platelet SrTiO₃ crystals as well as various technologically important materials. Based on the results of X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy, the formation mechanism of platelet Sr₃Ti₂O₇ crystals conforms to a nucleation–structure rearrangement–dissolution–diffusion in situ epitaxial growth mechanism model. First, SrCO₃ reacts with TiO₂ to form submicrometer SrTiO₃ nuclei. Then, most of the nuclei surrounded by salt ions aggregate and rearrange to form a large SrTiO₃ matrix. The structural rearrangement and the subsequent in situ epitaxial growth processes control the morphology, composition, and size of the final Sr₃Ti₂O₇ crystals. In the synthesis process, the conversion between SrTiO₃ and Sr₃Ti₂O₇ is as follows: and the crystallographic orientation relationship between Sr₃Ti₂O₇ and SrTiO₃ in the interface is (100)_S3T2//{100}_ST, (010)_S3T2//{010}_ST, and (001)_S3T2//{001}_ST.     

无水焦粉粉尘治理工艺改造及综合利用

简述了无水焦粉生产过程中的粉尘污染及其危害，分析了目前粉尘污染的现状、研究情况、环境监测及改造的必要性，提出了解决无水焦粉粉尘治理工艺改造的方案及粉尘的综合利用。     

Morphology and properties of blends of polypropylene with ethylene-propylene rubber

Great attention has been paid to the toughening of isotactic polypropylene (PP) in recent years in order to make full use of this plastic. This paper presents the results of our study on the compatibility of PP with ethylene-propylene-diene rubber (EPT), polybutadiene rubber (PB) or styrene-butadiene rubber (SBR) through characterization of the blends' morphology, and on. the morphology and properties of binary blends of PP with EPT (EPT/PP) and ternary blends of PP, EPT, and polyethylene (PE) (EPT/PE/PP). Morphological structure of solution blends and the great improvement in low-temperature impact strength and other properties of the mechanical blends have shown the difference among EPT, PB, and SBR in compatibility with PP, the effectiveness of using EPT as PP's toughening agent, and the effect of EPT on EPT/PP blend as both toughening agent and compatibilizer. Addition of EPT to EPT/PP made interesting changes in morphology but no effect on properties was observed.     

温度对工业汽轮机运行的影响

由于温度的变化，而引起机组热应力的变化，这是工业汽轮机运行中最主要的变化，它对机组的安全和运行影响非常大。     

认识隐患预防事故

事故隐患是客观存在的，不论你是否承认，是否意识到，它都存在于企业的生产全过程，而且对员工的人身安全，国家的财产安全和企业的生存、发展都直接构成威胁。正确认识隐患的特征，对熟悉和掌握隐患产生的原因，及时研究并落实防范对策是十分重要的。下面就这方面的问题，谈一点粗浅认识。     

熔融石英陶瓷的性能及其应用

介绍了石英陶瓷的性能特点、制备过程及应用领域     

山梨醇类聚丙烯成核剂的开发与应用研究进展

综述了山梨醇类聚丙烯成核剂产品在国内外的开发进展，介绍了该类成核剂在聚丙烯中的应用和效果，及其作用机理。     

Charge reduction and regeneration in K+, Na+, Mg2+, Ni2+ and Co2+-exchanged Wyoming Bentonite

Controlled calcination of ion-exchanged Wyoming Bentonite in the presence and absence of ammonia leads to layer charge reductions. Detailed chemical analyses of both unexchangeable and exchangeable species lead to the conclusion that in no case is there migration of the original interlamellar cations into the octahedral region of the layers although, in terms of ionic radius alone, Mg²⁺, Ni²⁺ and, possibly Co²⁺, might be expected to do so. The production of unexchangeable Mg, Ni or Co, is identified as resulting from high temperature hydrolysis leading to hydroxide or oxide formation.     

浅谈创业教育

按照《面向21世纪教育振兴行动计划》提出的目标，我国高等教育到2010年入学率接近15％，这个目标有可能提前实现；若按每年新出生人口为2000万计算，高等学校在校生规模将达到1500万，每年毕业生将在500万以上。面对这样沉重的就业压力，转变大学生毕业就是到社会上寻求工作岗位的就业观念，树立和加强创业教育，引导毕业生走自己的路，就显得有十分重要的特殊意义了。     

露天开采下盘无台阶采矿法

新桥硫矿首次在国内推行露天开采下盘无台阶采矿新工艺,该工艺具有剥岩少、基建快、出矿早、采矿工程延深快等特点。由于该工艺具有独特的靠帮方式和端部过渡方式,需严格控制底盘因爆破而导致的岩体滑动。该工艺的实施已取得了显著的经济效益。