查询词典 grain crystal

In order to prevent grains from congregating so as to minish the size of the powder, the growing rate of the crystal grain was controlled during the hydrolysis of tetra-nbutyl titanate by using the competitive reactivity of the surface modifier sulfhydrate.

动态分子光谱分析法示踪了偶氮染料、取代酚在TiO〓半导体界面/溶液的光降解动力学行为，发现了中间体生成和衰减的峰形动力学特性，应用误差补偿理论拟合了中间体的峰形动力学曲线。

The crystal grain shape of desulphurization gypsum affects the performance of gypsum products.

脱硫石膏的晶体颗粒形态是影响石膏制品性能的重要因素之一。

Mainly research results are:(1) Through electromagnetic stirring the crystal grain has been thined and the equiaxed rate enhanced from 85% to 93%.

主要研究结果为：(1)铸坯等轴晶率从未搅拌的平均85%左右提高到电磁搅拌后的平均93%左右。

The crystal formation of CVD—ZnS can be divided into two phases: the nucleation and growth of the fine grains with equiaxial shape on the substrate surface, and then the growth of the coarse columnar grains on the fine grain layer.

鉴于此，本文用CVD法制备了ZnS块材料，系统地研究了ZnS沉积工艺与其组织和性能（包括光学、热学、力学性能）间的相互关系，确定了最佳工艺参数，取得了以下成果： 1。

The results showed that (1) The grain size of nanometer YiO_2 was40～80nm.The wavelength corresponding to the maximum absorbency values were observedin the 200～320nm range.The crystal structure of carbon doped TiO_2 photocatalyst is primarilyanatase(22.43% rutile), and the content of carbon is about 4.6%.(2) The relative humidityvaring from 8% to 80%, the photocatalytic degradation degree of benzene increased withincreasing relative humidity; and to toluene, degradation rate was hanced by relative humidityup to 60%, and more or less inhibited above 60%.(3) Scheme and results of orthogonal testswere used by evaluating the photocatalytic performance of the gas phase methanol, acetoneand 1-heptane.The results revealed that their degradation degree reached 84.5%, 93.39% and93.45%, respectively.(4) The 254nm UV lamp showed higher photocatalytic degradation rate.For methanol, acetone and 1-heptane, it was found that photocatalytic degradation reactionoccurs with the light strength of daylight lamp.(5) Under the the same conditions, 15%degradation degree has been obtained for benzene, whilst about 10% degradation degree wasattained by Degussa P25; During the initial phases, the toluene revealed higher photocatalyticactivity, comparing with Degussa P25, the degradation degree of methanol, acetone and1-heptane were slightly lower.

结果表明：(1)CVD法制备的纳米TiO_2光催化剂，颗粒球形度好、粒径在40～80nm之间；最大吸光度值所对应的波长为200～320nm；含碳量约为4.6％；晶型组成主要为锐钛矿型，金红石的含量约为22.43％；(2)在相对湿度为8％～80％范围内，苯的光催化降解率随着相对湿度的增大而增大；甲苯在相对湿度为60％时达到最好降解效果，当相对湿度增大到80％时光催化效果降低；(3)将正交实验设计及实验方案应用于气相甲醇、丙酮和正庚烷光催化降解研究，实验结果表明：三者最高降解率分别为84.5％、93.39％和93.45％；(4)有254nm紫外灯参与的光催化实验可以大大提高有机气体的光催化降解率；在日光灯的照射下，掺碳纳米TiO_2对气相甲醇、丙酮和正庚烷具有一定的光催化氧化能力；(5)较P25粉，在相同的光催化操作条件下：气相苯的平均降解率达15％，高于P25粉10％的降解率；气相甲苯在初始阶段具有较高的反应速率；气相甲醇、丙酮和正庚烷的降解率略低于P25粉。

Maba Yu Jien rice on endemic soil, water, climate and human factors such as the use of a unique breeding, processing technology of production, grain quality perception crystal bright, shiny and oil rich texture.

马坝油粘米依靠当地特有的土壤、水质、气候和人文等因素，运用独特的选育、加工工艺进行生产，米质观感晶莹光亮，富有光泽和油质感。

Metallograph and SEM observation of the tensile fracture show that the crystal grain of the WTIR weld is finer and the metallurgical structure is more compact than that of the ordinary weld.

金相和拉伸断口 SEM观察表明，随焊冲击碾压焊缝区晶粒明显细化，组织更加致密，气孔、缩松等缺陷大大减少。

The fabrics and crystals of one-year ice in the Bohai Sea show that the noncontiguous ice growth rate makes an ice sheet have level layers with different amount of air bubbles in lower part of the ice sheet; typical grain ice and columnar ice occur in the gray ice which grows in stable water; thaw-refrozen ice and rafted ice have their crystal characteristics.

作者中文名：李志军；康建成；蒲毅彬摘要：渤海一年冰的组构和晶体结构表现出的冰的非连续生长速率使得冰层底部具有气泡含量不同的许多分层；静水生长的灰冰具有典型的粒状冰和柱状冰；融化-重冻结冰和重叠冰具有特定的晶体结构。

Crystalline and amorphous nano-Al_2O_3 powder were synthesized by room-temperature hydrolysis method and direct oxidic method respectively, and nano-SnO_2 powder was produced by sol-gel technology. Their microstructure features and growth behavior of crystal grain were studied in detail, and corresponding model and theory were put forward to explain them.

采用室温水解法和直接氧化法分别获得了晶态和非晶态纳米Al_2O_3粉，采用溶胶-凝胶法制备了纳米SnO_2微粉，研究了它们的微结构特征与晶粒生长行为，并提出了相应的模型与理论去解释。

The results indicate that the pillaring process and crystal growing of anatase can be more easily realized by increasing the acid-base ratio of pillaring agents, raising the pillaring temperature and adding proper quantities of alkali. The calcination of Ti-pillared precursor brings the growth of TiO2 grain, at the same time the layer distance is declined. In order to obtain ideal products, the right pillaring conditions are: the acid-base ratio of pillaring agents of 13, pillaring temperature of 65 ℃ and the volume of alkali (2 mol/L) in pillaring liquid of 6 mL.

结果表明：在一定范围内增大柱撑剂酸碱比、提高柱撑温度以及加入适量碱，有利于插层复合反应的进行和锐钛晶型的生长；柱撑前驱物焙烧后TiO2晶粒长大，同时焙烧引起的脱水导致膨润土层间距的下降；为获得较理想的产物，合适的柱化条件为：柱撑剂酸碱比 n n (HNO3)为13、柱撑温度65 ℃和柱撑液加碱量为(2 mol/L NaOH) 6 mL。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。