Control of the Crystal Polymorphs and Morphology of Calcium Carbonate by Polymers 聚合物控制碳酸钙晶型、形貌的研究
Only the powder crystal of ammonium magnesium carbonate tetrahydrate prepared was reported in previous literature, but there was no report on the synthesis of its single crystal. 对于碳酸镁铵的合成,通过查相关资料,前人仅制得该物质的粉末晶体,并未见有合成单晶的报道。
Effect of Copper-zinc Alloy on the Crystal Structure of Calcium Carbonate Scale 铜锌合金对碳酸钙水垢晶体结构的影响
Results show, this flyash has high content of CaO and SO 3, but lower of f-CaO, its mineral constitution, besides vitreous body and inert crystal, still contains a few of cementing mineral, calcium sulphate and calcium carbonate. 结果表明高钙固硫粉煤灰的CaO和SO3含量都较高,但f-CaO含量并不高;矿物成分除玻璃体和惰性晶体外,还含有少量的胶凝矿物以及硫酸钙和碳酸钙;
β crystal form PP might be induced by the complex of calcium carbonate with impurities in PP, appropriate crystallization temperature and high shear processing machine, respectively. 碳酸钙与聚丙烯中杂质等形成的复合物、合适的结晶温度和高剪切力加工设备均会诱发聚丙烯/碳酸钙复合材料中β晶型聚丙烯的生成。
By liquid-liquid reaction of CaCl_2 and NH_4HCO_3 and addition of a trace amount of H_2SO_4 as crystal control-additive, ultra-fine porous calcium carbonate was obtained. The CaCO_3 crystal particles are spherical and dispersive and their diameters are under 1 μ m. 采用CaCl2与NH4HCO3为原料,添加H2SO4作结晶控制剂的液相碳化法,可制得粒径小于1μm、无团聚的多孔性超细碳酸钙。
Experiment Research on Rapidly Settling and Crystal of Neodymium Carbonate 快速沉淀晶型碳酸钕的试验研究
Influence of chemical additives on the crystal polymorphs and shapes of precipitated calcium carbonate 晶型控制剂对沉淀碳酸钙晶型、形态的影响
An approach to the induction of crystal form of superfine calcium carbonate 超细碳酸钙生产中的晶型诱导
On the crystal process and product stability of the ultrafine calcium carbonate whiskers in high_gravity field 超重力场中微细晶须碳酸钙结晶过程及产品稳定性研究
Birth and Effect of β Crystal Form Polypropylene in PP/ Calcium Carbonate Composites 聚丙烯/碳酸钙复合材料中β晶型聚丙烯的生成及其作用
The article uses "the Double-film Theory" and "Chemical Reaction Engineering Analysis" way to study the dynamic areas, crystal principle and its 'carbonized mechanics of all terms high concentration CO_2 to produce super-fine calcium carbonate. 论文利用双膜理论和化学反应工程分析的方法,探讨了高浓度CO2生产超细碳酸钙的碳化反应各阶段的动力学区域、碳化反应机理和结晶原理;
The factors which influence the production of β crystal form in polypropylene/ calcium carbonate composites, the production mechanism of β crystal form polypropylene and its influence on the properties of the composites were reviewed. 综述了在聚丙烯/碳酸钙复合材料中影响β晶型聚丙烯生成的因素、β晶型聚丙烯的生成机理以及β晶型聚丙烯对复合材料性能的影响。
Meanwhile, the preparations of different crystal form calcium carbonate are also studied in this paper. 同时,本论文还对不同晶形碳酸钙的制备进行了研究。
Synthesis and crystal structure of magnesium ammonium carbonate tetrahydrate 四水合碳酸镁铵的合成及晶体结构
Methods of Improving the Crystal Degeneracy of Sodium Carbonate in the Alumina Production Flow 改善氧化铝生产流程中碳酸钠结晶变性的方法
From stress-strain curve of calcium carbonate crystal, nano-calcium carbonate crystal is strong anisotropy and nonlinear characteristic. 从碳酸钙晶体的应力-应变曲线看,纳米碳酸钙晶体具有强各向异性和强非线性的特性。
The crystal quality of monohydrate sodium carbonate is the key to the produce heavy sodium carbonate by the method of the monohydrate sodium carbonate. 提高一水碱结晶质量是提高(一水碱法)重质纯碱质量的关键。
Research on crystal control of barium carbonate by homogeneous precipitation method 均相沉淀法制备不同晶形碳酸钡的研究
The crystal is applied to the papermaking that can raise whiteness and non-transparency, remains-proportion of the crystal is higher than the usual light calcium carbonate. 晶须作为造纸填料,可使纸张的白度和不透明度提高,留着率比造纸常用填料轻质碳酸钙高;
The calcinations regulation of limestone and the concentration of calcium hydroxide solution have effects on the granularity of the calcium carbonate crystal. Synthesized Amphiphilic St-AA Copolymers Modulate Calcium Carbonate Crystal Habit and Morphogenesis 石灰石原料的煅烧制度和氢氧化钙溶液的浓度将影响碳酸钙结晶的粒度。合成两亲St-AA共聚物调控碳酸钙的结晶和形貌
Study on Crystal Structure of PP Filled with Size Grading Calcium Carbonate by XRD 碳酸钙级配填充聚丙烯结晶形态的XRD研究
Controlling for crystal habit of carbonate hydroxyapatite on capacities absorbing f~-and its mechanism 碳羟磷灰石结晶习性对吸F~-容量的控制及其机理
Through much experiments, the growth of crystal that fitting teaching and observing micro-compound experiment is designed, meanwhile, a new basic experiment design on barium carbonate crystal minisize synthesis and observation is given. 通过大量实验摸索,设计出适合课堂教学的晶形生长和观察的微量合成实验,给出晶形合成与培养观察的微型基础新实验方法。
Through investigating the structure of the products, confirm that the product is monocline crystal of basic magnesium carbonate 3MgCO_3 · Mg ( OH)_2 · 3H_2O. 通过对产品进行结构表征,确定产品为3MgCO3·Mg(OH)2·3H2O结构的单斜晶体;
In the recycling, continued evaporation, weathering and impurities carried of the water often cause cooling water system to appear concentrated crystal, the most common of which is calcium carbonate fouling, which has effect on the safe and economic operation of the circulating cooling water system. 在循环使用中,水质不断蒸发、风化和杂质携带,致使循环冷却水系统常出现浓缩结晶,其中最为常见的是碳酸钙垢,影响了循环冷却水系统的安全经济运行。
In recent years, the extreme demand for high quality calcium carbonate products increases year by year, which are mainly a variety of special crystal form of calcium carbonate products. 近些年,橡胶、造纸、塑料等行业快速发展以及对高品质产品的极度需求使得碳酸钙需求量逐年上升,主要是各种特殊晶形的碳酸钙的需求量增加。