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长石
相关语句
  feldspar
    Application of Feldspar in Synthesis of Leucite
    钾长石在白榴石合成中的应用
短句来源
  feldspathic
    Research on Machinable Dental Feldspathic Ceramics Used in CAD/CAM System
    牙科CAD/CAM加工用可切削长石瓷的研究
短句来源
    1. In the most appropriate range of sintering temperature for feldspathic ceramics, sintering time should be prolonged appropriately (5 hours) to increase the content of leucite crystals.
    1.长石瓷有一最佳的烧结温度范围,在此范围内,适当延长保温时间(5小时)有利提高长石瓷中白榴石的含量。
短句来源
    With the increase of the content of leucite crystals, the fracture toughness of feldspathic ceramics will increase accordingly.
    随着白榴石晶相含量的增加,长石瓷的断裂韧性也随之提高。
短句来源
    5. After adjusting content of raw materials and optimizing the fabrication process, feldspathic ceramics have been produced. Its fracture toughness reaches 1.19 Mpa-m1/2, which is equal to the one of Vita Mark II (1.21 Mpa-m1/2).
    5.经过原料的筛选和工艺优化,研制出的可加工长石瓷的断裂韧性(1.19 Mpa·m~(1/2))非常接近国外同类可加工长石瓷产品Vita Mark Ⅱ(1.21 Mpa·m~(1/2))。
短句来源
    When crystal content is under of 10wt%, The KIC value of feldspathic porcelain is ascending obviously with the increase of crystal content.
    晶相含量小于10vol%时,长石瓷随着晶相含量的增加KIC值呈现明显的上升趋势。
短句来源
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  “长石”译为未确定词的双语例句
    2. As one of the main raw materials, the content of K2O or orthoclase (K2O-Al2O3-6SiO2) is the key factor in the formation of leucite.
    2.K_2O或钾长石(K_2O·Al_2O_3·6SiO_2)作为长石瓷原材料的主要组分之一,其含量对白榴石的生成有决定性作用。
短句来源
    But feldspathetic porcelain is too brittle and fracture toughness is very low.
    但长石瓷脆性大,断裂韧性低,临床失败率比较高。
短句来源
    As a result, the heating rate and sintering temperature play an important part in the crystal content and grain size.
    所以升温速度和烧结温度对长石烧结体的晶相含量和晶粒度起着非常重要的作用。
短句来源
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  feldspar
The rocks are classified into greywackes or feldspar sandstones, grains of which are the mixtures of mafic rocks, felsic rocks, and quartz+calcite.
      
In conjunction with high abundances of Ba and Sr, as well as low abundances of Y and HREE, these patterns suggest a feldspar-poor, garnet±amohibole-rich fractionation mineral assemblage.
      
Empirical relationships describing the composition dependences of the chemical durability of glasses in the diopside-albite, diopside-anorthite, diopside-orthoclase, diopside-quartz, and diopside-feldspar systems are derived.
      
Two glasses of the same chemical composition manufactured while using two different sources of aluminosilicates: (1) sodium feldspar and (2) volcanic tuffs have been compared [1].
      
The influence of bacterial activity on glauconite formation is supported by the study of dissolution zones on quartz and feldspar grains, which revealed biomorphic structures akin to fossilized bacteria.
      
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  feldspathic
With the lowest abundances of Fe, Ti, and Th found on the Moon, the lunar highland terrains are quite homogeneous with two major large feldspathic units, one being slightly more mafic than the other.
      
The differences between the simulated melt compositions are interpreted with regard for variations in the temperature and composition of the parental magnesian liquids that assimilated compositionally similar feldspathic material.
      
Feldspathic metasomatic rocks from the Lermontovo deposit, Primorye, Russia
      
The deposition of quartz-feldspathic flyschoid sequences as products of scouring of sialic basement of the continental block was inherent to the Ukelayat type of sedimentation.
      
It was established that the assimilation of parental mantle basaltic melts by crustal, mainly feldspathic material is a decisive factor in the formation of multiple gabbro-granite complexes.
      
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Leucite has high thermal expansion coefficient, so the t hermal compatibility can be achieved between porcelain and metal. The frit conta ining leucite can be synthesized melting feldspar depending on annealed. The res ult showed that main crystal phase of frit was leucite. The thermal expansion co efficient of frit was 21.3×10 -6/℃。The frit is the foundation of improvi ng the thermal compatibility between porcelain and metal.

利用白榴石晶体的高膨胀性特点 ,解决烤瓷粉与金属合金之间的热匹配问题。以优质钾长石为主要原料 ,采取快速冷却的热处理制度合成白榴石熔块。X -线物相分析表明 ,熔块的主晶相为白榴石 ,熔块的平均热膨胀系数为 2 1.3× 10 - 6 /℃ ,为改善烤瓷粉与金属的热匹配提供了有利的条件。

Pure akermanite (Ca_2MgSi_2O_(7)) powders were synthesized by sol-gel method and two-step precipitation method, respectively. The in vitro bioactivity of akermanite powders obtained from the two different preparing methods was compared by soaking them into simulated body fluid (SBF). Hydroxyapatite (HA) formation on akermanite powders was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The changes of Ca and P ions concentrations and pH value of SBF after soaking were evaluated...

Pure akermanite (Ca_2MgSi_2O_(7)) powders were synthesized by sol-gel method and two-step precipitation method, respectively. The in vitro bioactivity of akermanite powders obtained from the two different preparing methods was compared by soaking them into simulated body fluid (SBF). Hydroxyapatite (HA) formation on akermanite powders was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The changes of Ca and P ions concentrations and pH value of SBF after soaking were evaluated by inductively coupled plasma atomic emission spectroscopy (ICP-AES) and pH meter, respectively. The results show that HA is obviously detected on akermanite prepared by two-step precipitation method after only 5 days of soaking, while it is detected after 7 days of soaking for HA on akermanite prepared by sol-gel method. The HA crystalline on akermanite prepared by two-step precipitation method is in worm-like structure, and the crystalline on akermanite prepared by sol-gel method is in unperfect and spherical structure. The ability of Ca releasing from akermanite prepared by two-step precipitation method is higher than that of akermanite prepared by sol-gel method. Therefore, the in vitro bioactivity of akermanite prepared by two-step precipitation method is better than that prepared by sol-gel method.

通过溶胶凝胶法和两步沉淀法分别合成镁黄长石(Ca2MgSi2O7)粉体,并通过模拟体液浸泡对这两种方法合成的镁黄长石的体外生物活性进行比较。用X射线衍射、扫描电镜、原子发射光谱(ICP AES)以及pH计分别对浸泡后形成的羟基磷灰石的物相、形貌以及浸泡后模拟体液的离子浓度变化、pH值进行表征。结果表明:两步沉淀法合成的镁黄长石在浸泡 5 d后就能明显检测到羟基磷灰石生成,而溶胶凝胶法合成的镁黄长石在浸泡7 d后才能检测到羟基磷灰石生成;两步沉淀法合成的镁黄长石诱导的羟基磷灰石呈结晶较好的虫状结构,而溶胶凝胶法合成的镁黄长石诱导的羟基磷灰石呈结晶不完整的圆形颗粒结构;而且,两步沉淀法合成的镁黄长石具有更快的Ca离子释放能力。因此,两步沉淀法合成的镁黄长石相对于溶胶凝胶法合成的镁黄长石具有更好的诱导羟基磷灰石形成能力和生物活性。

 
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