白云母热化学处理对其制品性能的影响

研究了白云母经热化学处理后所产生的组成和微观、宏观结构的变化，探讨了这些变化对云母纸绝缘性能的影响，揭示了两种类型白云母纸性能差异的本质原因。     

我国白云母矿赋存地质特征及找矿远景

本文阐述了我国白云母矿产资源以及目前开采的状况,针对出现的白云母矿产资源短缺的现象,在分析我国白云母矿床分布地质特征的基础上,探讨了我国白云母矿床的找矿方向及其各主要白云母矿区扩大远景的可能性。     

无机物粉末对农用树脂薄膜红外线吸收特性的影响

用傅里叶红外光谱仪研究了低密度聚乙烯 ( LDPE)、聚氯乙烯 ( PVC)、聚乙烯醇( PEA)树脂薄膜及添加普通玻璃粉和白云母粉的 L DPE薄膜红外吸收特性 ,对 6.8～ 1 3.7μm范围的上述薄膜的红外线平均透过率进行了比较。结果表明 :PEA对红外线的透过率最小 ,具有很好的保温性能 ;L DPE薄膜红外线透过率最高 ,保温性能最差 ,但通过添加玻璃粉或白云母粉 (添加物的质量分数 1 0 %为宜 ) ,能有效地降低其红外线透过率 ,提高保温性能 ,同时 ,玻璃粉的添加对提高 L DPE薄膜的可见光透过率更为有利。     

江西某石墨矿床含钒白云母的矿物学特征及综合利用前景

江西某石墨矿床的含钒白云母是白云母亚族中白云母的一个变种,属沉积变质成因。     

我国白云矿产资源矿物学研究及开发利用概况

根据前人资料,本文阐述了我国白云母矿产资源以及目前开采的情况,针对出现的白云母矿产资源短缺的现象,提出了加大勘查碎云母资源工作力度,以缓解云母工业生产中普遍存在的原料短缺问题的思路;同时综述了白云母矿物学研究及其开发利用现状和存在问题,提出了今后应加强研究的方面。     

广西大厂矿田高峰锡多金属矿床花岗斑岩白云母化学特征及其地质意义

摘　要: 广西高峰矿床位于大厂矿田的南端, 区内出露的岩浆岩主要为呈南北走向, 并对早期形成的矿体产生了叠加改造作用的花岗斑岩岩墙。为探讨花岗斑岩在岩浆冷却结晶时及岩浆期后热液流体之来源和相关交代作用, 对花岗斑岩中以未矿化斑晶(WM-1)、 包体(WM-2)、 矿化斑晶(WM-3)以及基质(WM-4) 4 种形式产出的白云母进行了详细的电子探针分析。结果显示: 花岗斑岩中的WM-1 和WM-2 类型云母属于铁锂云母和富锂多硅白云母, WM-1 白云母可能是熔体冷却结晶过程中, 在流体的作用下钾长石和铝硅酸盐发生反应所形成的产物, 而WM-2 白云母则为WM-1 白云母其后发生脱水熔融作用过程中的残留物, 两者都属于广义上的原生白云母; WM-3 和WM-4 则属于普通白云母和多硅白云母, 为后期热液成因的次生白云母。与原生白云母相比, 次生白云母具有相对富硅、 镁, 贫铁、钠、 钛、 铝、 锂和氟的特点, 暗示在花岗斑岩上侵结晶的过程中, 不同阶段形成的原生白云母和次生白云母其共存的流体在来源和成分上有显著的差异性, 热液流体存在不连续演化的现象。早期流体相对富Fe、 Ti、 Li 和F, 其来源很可能是矿物分离结晶过程中由于熔体中水含量增加而压力的降低, 导致岩浆中的水达到饱和而出溶流体; 而晚期热液流体相对富含CO2、 MgO 和SiO2, 来源于浅部地壳或地表大气降水, 携带了大量的CO2, 并溶解和萃取了围岩中的部分Mg 和Si 之后, 沿早期形成的控矿构造进入深部与后期填充的花岗斑岩脉发生岩水反应, 导致白云母发生绿鳞石和契尔马克替代::R³⁺ +Al^IV =Si+R²⁺ (R³⁺ =Al, Fe; R²⁺ =Mg, Mn),使其转化为普通白云母+绿鳞石的混溶体。     

新型生物活性微晶玻璃的研究

本文研制了一种以氟磷灰石与镁白云母为主晶相的微晶玻璃材料,该材料具有良好的生物活性与可加工性。讨论了镁白云母的解理性与微晶玻璃可加工性的关系。并且分析了它与骨结合界面层的结构。新材料适合作为医用人工骨材料。     

白云母在碱剂中的溶蚀实验研究

系统地研究了白云母与碱剂（Ｎａ２ＣＯ３和ＮａＯＨ）间的相互作用;分别对反应的液相参数和固相参数进行了全面测定。研究结果表明,白云母在碱剂中存在的短期瞬时产应和振荡变化趋势;ＮａＯＨ浓度差异对白云母溶蚀程度的影响明显强于Ｎａ２ＣＯ３浓度差异对它的影响,此外,反应液中硅铝元素浓度之比与原始固相中的比例一致说明白云母在碱剂中发生了一致性溶蚀,而温度升高可以促进白云母的溶蚀。     

柴北缘鱼卡河超高压变质金红石中Si含量及其地质意义

利用LA-ICP-MS方法对柴达木盆地北缘鱼卡河超高压变质的多硅白云母榴辉岩及共生的石榴角闪钠长岩中的金红石进行了详细的矿物学和LA-ICP-MS原位微量元素研究。结果表明:多硅白云母榴辉岩中金红石显示Si成分环带,且Si含量(质量分数,下同)随变质压力而发生规律性的变化; 从进变质到峰期变质阶段,金红石中Si含量从核部向边部呈升高趋势,峰期金红石的边部Si含量达到最高,退变质阶段金红石中Si含量从核部向边部呈降低趋势; 石榴角闪钠长岩中的金红石主要呈包体产于多硅白云母、石榴子石、角闪石和钠长石中; 在相同的超高压变质条件下,石榴角闪钠长岩中多硅白云母包体金红石的Si含量((1 018～2 741)×10^-6,平均为1 924×10^-6)明显高于多硅白云母榴辉岩中的峰期金红石((450～2 397)×10^-6,平均为952×10^-6)。综合多硅白云母榴辉岩和石榴角闪钠长岩的产状、变质演化和全岩成分以及前人对大别—苏鲁超高压榴辉岩中富硅金红石的研究结果提出,超高压变质岩石中金红石的Si含量与变质压力成正相关关系,金红石中Si含量大于500×10^-6可以作为榴辉岩经历超高压变质作用的指示标志。超高压金红石中Si含量与全岩成分中SiO₂和TiO₂含量有关,随SiO₂含量的升高和TiO₂含量的降低而升高。     

脱水褐煤中矿物质对复吸性能的影响

利用XRF、低温灰化+XRD及FTIR分析胜利高灰褐煤中矿物质组成及特性,在30℃不同相对环境湿度条件下,考察了脱水褐煤的复吸性能,研究了矿物含量对脱水褐煤复吸性能的影响.结果表明:胜利褐煤中矿物有石英、高岭石、白云母、石膏、正长石和赤铁矿等,其中石英和高岭石含量最高,分别占矿物总量的38.1%和28.4%;脱水褐煤的复吸性能受到环境湿度和矿物含量的影响,同一相对湿度下煤样的复吸率随着矿物含量的升高而降低;煤中矿物表面基团吸附水分子的能力较有机含氧官能团弱.     

Properties and Structure of Microcrystal Muscovite Composite Superabsorbent

Microcrystal muscovite composite superabsorbents(MMCSA) were prepared by water solution polymerization using acrylic acid, acrylamide and itaconic acid as comonomers and microcrystal muscovite as an inorganic additive. Properties, such as water absorbency, salt absorbency, gel strength, water retention capacity and structure of MMCSA characterized by SEM and XRD, were investigated. Water absorbency, salt absorbency, gel strength, water retention capacity and thermostability were enhanced by incorporation of suitable amount of microcrystal muscovite. Water absorption of MMCSA was rapid, requiring 24.55 min to reach 63% of equilibrium absorbency(1218 g/g). Microcrystal muscovite was physically combined into the polymeric network without destroying its polycrystalline structure and microcrystal muscovite composite superabsorbent had some irregular, undulant, and small microporous holes with sheet-like microcrystal muscovite distributed in the polymeric matrix.     

Mechanical and thermal properties of muscovite and density polyethylene-reinforced and -toughened polypropylene composites

The mechanical and thermal properties of polypropylene (PP)/muscovite/low-density polyethylene (LDPE)/polypropylenegraftmaleic anhydride (PP-g-MAH) ternary composites were investigated. In PP matrix, muscovite, LDPE, and PP-g-MAH were added as strengthening agent, toughening agent, and compatibilizer, respectively. The effects of dosages of the added materials were analyzed. The experimental results show that the optimum recipe of PP/muscovite/LDPE/PP-g-MAH composites is100/10/6/20 (mass ratio). Compared with the pure PP, the mechanical properties of PP/muscovite/LDPE/PP-g-MAH composites, including notched impact strength, Rockwell hardness and flexural strength, are improved. Although tensile strength is slightly decreased, they have better toughness. Filled with muscovite, the heat-resistance and heat-decompostion of the composites are improved. Funded by the 11th Five-Year National Key Technology R&D Program(2006BAB12B02)     

Comprehensive utilization of kaolin ore accompanying muscovite

In light of the problems of low-quality and low degree of comprehensive utilization of Guangdong muscovite-type kaolin, the reasons affecting the quality of kaolin were found to be a small amount of maroon powdery goethite adhering to the surface of kaolin and minor muscovite affecting the firing whiteness of products. The ores were dealt with by using the new combined process of attritioning-classification-bleaching and flotation. The separation of kaolin from muscovite, quartz and feldspar can come true through the new process. The high-quality kaolin with the firing whiteness of 91% can be obtained, and the muscovite is comprehensively recovered by adopting the key technology of flotation. The content of high-purity muscovite produced is over 99%. The muscovite discarded by original process can be comprehensively recovered.     

Influencing mechanism and interaction of muscovite on thermal decomposition of ammonium polyphosphate

The interaction mechanism and phase evolution of ammonium polyphosphate(APP)mixed with muscovite(APP/muscovite)were studied by TG,XRD and SEM,respectively,during heating.When the temperature is not higher than 300 ℃,muscovite has no effect on the thermaldecomposition of APP,and the initialdecomposition temperature of APP/muscovite at 283 ℃ is basically the same as the APP at 295 ℃,and the main thermaldecomposition products are polyphosphoric acid and NH_4H_2PO_4 at 300 ℃.The polyphosphoric acid,the decomposition products of APP,can enable K and Siout of muscovite and interact with muscovite chemically to generate Al_2O_3·2SiO_2,α-SiO_2 and phosphates(AlPO_4 and K_5P_3O_(10))compounds during 400 ℃-800 ℃,which own obvious adhesive phenomenon and porous structure with the apparent porosity of 58.4%.Further reactions between phosphates other than reactions among Al_2O_3·2SiO_2 and α-SiO_2 can generate KAlP_2O_7 at 1 000 ℃ and the density of residualproduct is improved by low melting point phosphate filling pore to form relatively dense structure and decrease the apparent porosity to 44.4%.The flame resistant and self-supported ceramic materials are expected to enhance the fire-retarding synergistic effect between APP and muscovite.     

可加工生物活性微晶玻璃的研究

本文以 K_2O-MgO-Al_2O_3-B_2O_3-SiO_2-F 系统玻璃为基础,添加一定量的CaO 和 P_2O_5,经热处理,获得了一种含有白云母和氟磷石的可加工生物微晶玻璃。这种可加工材料具有很好的生物相容性和一定的活性。通过在 PH7. 4模拟体液中的侵蚀试验和动物试验对材料的生化性能作了研究,对材料的力学性能也作了测试。本文还利用红外光谱、拉曼光谱、透射电镜等研究了玻璃的结构和分相。     

净水污泥的性质与资源化利用

主要通过分析苏州新区水厂的净水污泥来探究净水污泥的成分、主要的物相组成与性质,并且初步评估了利用净水污泥制备吸附剂的可行性。研究表明,净水污泥有机质含量约为18%左右,主要的矿物组成为石英、白云母和高岭土等。此外,还对水厂污泥进行了比表面和热重分析测试。由于污泥灰的化学组成与粘土相似,因此可以利用净水污泥制备去除水中重金属离子的吸附剂。以Cd2+为吸附对象,研究了吸附时间、吸附温度、初始浓度及pH对污泥吸附效果的影响。     

Method for grinding and delaminating muscovite

A method of dry grinding muscovite based on the use of knife-mills is reported. It was possible to produce mica with a particle size below 100 and 45 μm. After grinding, the samples were submitted to sonication treatment, which promoted delamination of the material. The particle size distribution shows that sonicated mica has more particles in the size range 10-50 μm than does non-sonicated mica have.This also indicates a decrease in the average particle size. Characterization of the treated muscovite by scanning electron microscopy revealed a highly delaminated material with a plate-like structure. The products were characterized by chemical analysis and X-ray diffraction, too. This mica has already been used for the synthesis of pearlescent pigments.     

宣汉黄金口勘探区须家河组的砂岩岩石学特征

研究区须家河组砂岩由碎屑组分和填隙物组成。矿物碎屑主要由石英、长石和白云母组成,此外可见少量绿帘石、电气石、磁铁矿、黄铁矿、石榴子石和锆石等。岩屑主要有硅质岩屑、泥岩屑、板岩岩屑和千枚岩屑等。填隙物主要包括杂基和胶结物组成。杂基可见原杂基、正杂基和假杂基。胶结物主要为钙质和泥质。砂岩的岩石类型主要为岩屑砂岩,其次为为岩屑质石英砂岩及少量石英砂岩。