板钛矿

The results of XRD showed that as-prepared films were not only in anatase state but also in brookite.

结果表明：纯TiO2薄膜中，TiO2不仅以无定型态存在，而且还以板钛矿和锐钛矿的形式存在。

The results show that the pure TiO2 thin film composed of not only amorphous but also brookite and anatase.

结果表明，纯TiO2薄膜中，TiO2不仅以无定型态存在，而且还以板钛矿和锐钛矿的形式存在。

The titanium dioxide is one kind of important industrial chemicals, mainly has the brookite, Rutile and anatase three crystal seeds.

二氧化钛是一种重要的化工原料，主要有板钛矿、金红石和锐钛矿三种晶型。

Bismuth titanate submicron-rods are synthesized by hydrothermal method using anatase and brookite nanocrystallites, respectively, as precursors.

分别以板钛矿和锐钛矿型的TiO2为先驱物水热合成钛酸铋亚微米棒。

Result of photocatalytic degradation of methyl orange showed that the TiO2 photocatalytic activity decreased with the decreasing of anatase ratio in the mixed crystallite of anatase,rutile,and brookite;and photocatalytic activity of pure rutile TiO2 was relatively bad.

光催化降解甲基橙的研究表明，所得锐钛矿、金红石和板钛矿3种混晶中，二氧化钛的光催化活性随着锐钛矿含量的降低而降低；纯金红石型二氧化钛的光催化活性较差。

TiO_2 is a very important wide bandgap semiconductor, which mainly include three crystal structures. Anatase and rutile are tetragonal. Brookite is orthorhombic.

TiO_2是一种重要的宽禁带半导体材料，主要有3种晶型，即金红石、锐钛矿和板钛矿结构，其中金红石和锐钛矿属四方晶系，板钛矿属正交晶系。

1The nanocrystalline TiO2 film is prepared by sol-gel and appearance of the film is observed by SEM. The X-ray graph shows the film has lots of anatase and a few rutile TiO2, but does not have brookite TiO2. The average diameter of particle is 25nm according to Scherrer formula.

采用溶胶-凝胶法制备了纳米晶二氧化钛薄膜，通过扫描电镜观察了其形貌，X射线衍射表征显示出制备的薄膜具有大量的锐钛矿晶型和少量的金红石晶型，不含有板钛矿晶型，根据Scherrer公式计算出薄膜的晶粒的平均尺寸为25nm。

Using the aforementioned experimental methods,the author has performedcareful study on the thermoanalytical characteristic of nanocrystalline brookite-basedTiO2,and found that on the DTA curve there exists a small irreversible endothermicpeak,which is related to the dramatic structural phasetransformation from brookite to anatase then to rutile.

利用上述实验手段，作者首次对板钛矿基(brookite-based)纳米TiO2的热分析特性进行了较系统、深入的研究，发现在DTA曲线上存在一较小的不可逆、无失重吸热峰，对应于从板钛矿经锐钛矿到金红石的急剧转变。

When the is 0.1mol/l, ratio / is 0 or 4, aged at 95250℃ for 24 hours, anatase and rutile TiO〓 particles are formed respectively; when the ratio / is between 0 and 4, mixture of anatase and rutile TiO〓 particles is formed, the high the temperature the more the rutile phase. When the / is 5, aged at below 200℃ for 24 hours, amorphous product is gained, aged at 250℃ for 24 hours, olive-like TiO〓 particles with brookite structure are formed.

Ti〓=0.1mol·L〓时，95～250℃陈化，/比为0时，得到金红石型TiO〓颗粒，/比为4时，得到锐钛型TiO〓颗粒；/比介于0～4，可得到金红石型与锐钛型混合二氧化钛颗粒，温度越高含金红石型成分越多；/比为5，200℃以下陈化，得无定型产物，250℃陈化得橄榄形单分散板钛矿型二氧化钛。

Nanosized titania particles consisting of anatase, rutile and brookite phases were synthesized under solvothermal conditions with different alcohols as solvents, hexamethylene tetramine as precipitant as well as precursor of titanium trichloride.

采用不同的醇溶剂，以六亚甲基四胺为沉淀剂，以TiCl3为前驱体，通过溶剂热的方法控制合成出纳米级的锐钛矿型、金红石型和板钛矿型的二氧化钛。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了