查询词典 barium octahydrate

Using barium hydroxide octahydrate and urea as raw material,barium carbonate is prepared by homogeneous precipitation method.

以八水氢氧化钡和尿素为原料，采用均相沉淀法制备了碳酸钡粉体。

The melting temperatures were found to be 71℃ for aluminum nitrate enneahydrate and 76℃ for barium hydroxide octahydrate, respectively. The measured temperature of fusion agreed with the data in literature.

但这些无机水合物在不同温度下的导热系数未见系统报道，为此，本文测定了一系列熔化热大于150 kJkg-1、熔点低于100℃的无机水合物在10℃~80℃温度范围的导

Aluminum nitrate enneahydrate and barium hydroxide octahydrate are considered as potential phase change materials for energy storage.

用热敏电阻作加热元件和测温元件，首次测定了适合用作相变储能材料的九水合硝酸铝、八水合氢氧化钡导热系数的测定在10℃~80℃温度范围的导热系数，其实验值的不准确度分别为2.8%和3.2%。

The uncertainties of the measured thermal conductivities were estimated to be ?.8% for aluminum nitrate enneahydrate and 3.2% for barium hydroxide octahydrate, respectively.

导热系数是物质的基本物理性质之一，在储能材料研究领域的理论计算、实用储能设备的设计以及相关材料的传热学研究中，都是必不可少的热物理数据，测定导热系数具有很重要的理论和实际意义。

Aluminum nitrate enneahydrate and barium hydroxide octahydrate are considered as potential phase change materials for energy storage. In this work, the thermal conductivities of aluminum nitrate enneahydrate and barium hydroxide octahydrate were measured in the temperature range from 10℃ to 80℃, by means of a calorimeter equipped with a thermistor.

无机结晶水合物提供了熔点从几摄氏度到一百多摄氏度的可供选择的相变储能材料，使用范围广，价格较便宜，熔化热较大，体积储热密度较大，一般成中性，是100℃以下储能用相变材料中的最佳候选材料之一[1]。

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％。