查询词典 borides

The results of XPS about the boron-rich rare-earth borides synthesized by themethod mentioned above show that the valence of La is +3, and the valence of Smand Eu is a fluctuation system in which the average valence is about 2.6 for Smand 2.4 for Eu.

对〓(x=0.1，0.3，0.5，0.7，0.9)及〓(x=0.1，0.3，0.5，0.7，0.9)两个系列富硼双稀土硼化物的XPS研究表明：在这两个系列硼化物中La的价态均为+3价Sm的价态不随Sm含量的变化而变化，而Eu的价态随着Eu含量的变化而变化，随着Eu的含量的增加，Eu的价态逐步升高，当x=0.5时达到一极大值，然后随着Eu含量的增加Eu的价态逐步降低。

Various grinding machine components are made of superhard materials, including certain machine grade ceramics, including such materials as carbides, nitrides, borides, oxides, oxynitrides, or any other ceramic component.

由超硬材料制造的各种磨床部件，超硬材料包括某些机械等级的陶瓷、诸如碳化物、氮化物、硼化物、氧化物、氧氮化物或任意其它陶瓷组分的材料。

The total density of state of the the boron-rich rare-earth borides〓(R=La, Nd, Sm, Eu)are calculated using discrete variational X〓method.

计算所得到的态密度与XPS价带谱基本上相符，由于态密度与XPS价带谱的对应关系，表明计算结果的正确性。

Fe-Co and Fe-Co particles have similar surface, which all consist of iron oxides rather than cobalt oxides. Borides can not be formed by the boron atoms from FeB alloy.

Fe-Co和Fe-Co超微粒子的表面结构很相似，都存在铁氧化物层，两种粒子表面都不存在钴氧化物。

Meanwhile, the theoretical hypotheses about the heterogeneous nucleation ofα-Al on borides are controversial and disagree with the experimental phenomena in grain refinement.

同时，由于对α-Al/异质核心界面的研究深度不够，尽管目前存在多种α-Al晶粒细化机理模型，但是不同理论假说分歧严重，且与实验现象存在矛盾。

The results show that a surface layer of stable cobalt borides of CoB, CoW2 B2 and CoW3B3 formed at 950 ℃ can effectively reduce the diffusion of Co to the surface of cemented carbide substrates when diamond films are deposited.

结果表明，基体经硼化预处理后表面形成CoB、CoW2 B2、CoW3B3相；当沉积温度为750~800 ℃，碳源浓度为3.3%时，薄膜表面形貌和生长织构随着沉积气压改变有明显的变化；硼化预处理后所得样品在1 500 N载荷下压痕表现出良好的附着性能，较二步法预处理更加有效地改善了膜基附着性能。

In addition the company also sell a variety of borides Agents, zirconia grinding ball, lithium-bentonite, silicon nitride iron, Castable superplasticizer used, brick,×, silica and other refractory materials and products .

此外公司还代理销售各种硼化物、氧化锆研磨球、锂基膨润土、氮化硅铁、浇注料用高效减水剂、粘土砖、高铝砖、硅砖等多种耐火材料和制品。

Either an eutectic of γ-Ni+M23C6 or an eutectic of γ-Ni+nickle borides forms depending on the local composition.

依局部成份条件，形成γ-Ni＋M23C6共晶和γ-Ni＋镍硼化物共晶。

The results show that a surface layer of stable cobalt borides of CoB, CoW2 B2 and CoW3B3 formed at 950 ℃ can effectively reduce tKey words: diamond films; cemented carbide; boronizing pretreatment; adhesion

结果表明，基体经硼化预处理后表面形成CoB、CoW2B2、CoW3B3相；当沉积温度为750～800℃，碳源浓度为3.3%时，薄膜表面形貌和生长织构随着沉积气压改变有明显的变化；硼化预处理后所得样品在1500N载荷下压痕表现出良好的附着性能，较二步法预处理更加有效地改善了膜-基附着性能。

Transition metal borides and inorganic boron-containing compounds, such as TiB〓, BN, B〓C and BP, are one of the most important groups for application in high-temperature performance, electronics and catalysts. Traditionally, they were prepared by high-temperature reactions; however, the products were beyond nanometer scale.

中文题名溶剂热合成硼化物及非金属含硼化合物纳米材料副题名外文题名论文作者谷云乐导师钱逸泰学科专业无机化学研究领域\研究方向学位级别博士学位授予单位中国科学技术大学学位授予日期2003 论文页码总数70页关键词纳米材料硼化物溶剂热合成馆藏号BSLW /2003 /O613 /6 硼化物、非金属含硼化合物功能材料（如硼化钛、氮化硼、碳化硼和磷化硼等）通常具有高硬度、高熔点、机械强度大、高温化学稳定性好等一系列优良性能，有些还具有奇异的光、电、磁、热学性能和催化活性，是一类最富潜力的非氧化物高温结构材料、电子材料和催化材料。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。