查询词典 barium carbonate

The result indicates that the poach dissipation of ceramics can be reduced when low impurity constant barium carbonate raw material with spheroidal particles is used;and the relationship of dielectric constant to temperature is more stabilized.

结果表明，杂质含量低、球形颗粒的碳酸钡原料能显著降低陶瓷的水煮损耗，但陶瓷水煮损耗异常和其致密性不存在对应关系。

For comparison, ordinary aqueous precipitation method was used to prepare barium carbonate by using Ba(NO3)2 and NH4HCO3 as the reactants. The influences of adding sequence of the reactants and surfactant et al. on the products were discussed.

此外，以Ba(NO_3)_2与NH_4HCO_3为反应起始物，采用沉淀法研究了制备BaCO_3的影响因素，考察了加料方式、表面活性剂等因素对产物形貌的影响。

In order to realize the solvent-free preparation and to reduce the reaction time,the preparation of barium carbonate by solid state reaction at low heating temperatures under supersonic airstream was studied.

为了实现无溶剂制备及缩短反应时间，研究了在超音速气流下低热固相反应制备碳酸钡。

By comparing the rotary disc dryer with other dryers, it pointed that a rotary disc dryer can reduce operation cost and improve product quality in production of high purity barium carbonate .

对盘式干燥机的工作原理、结构特点进行了详细介绍，并将其它干燥设备和盘式干燥机作了对比，指出高纯碳酸钡行业采用盘式干燥机可以将生产成本降到最低限度，而产品质量可以得到很大提高。

The experimental results showed that the raw materials can be totally conversed when reacted for 45 min;and the average size of prepared barium carbonate was 1 μm.It also discovered that crystal water was not feasible for accelerating the reaction speed and increasing the degree of crystallization.

试验结果表明：反应45 min原料即可完全转化，制备的碳酸钡颗粒平均尺寸约1 μm，并且发现利用结晶水加快反应速度、提高产物结晶程度是不可行的。

In the preparation of high purity barium carbonate , exist some problems related with metal oxide pollution, control of the amount of the material to be added, moisture content higher then the standard, etc.

为解决高纯碳酸钡生产干燥过程中金属氧化物的污染、入料量不易控制、成品水分超标等生产难题，通过对所用电动离心喷雾干燥机辅助设备、控制系统的改进及干燥状态参数的确定，使高纯碳酸钡产品质量明显提高，其中：w≤5？06，w(H2O)≤0.1%，完全满足PTC用户的要求。

The phosphors were obtained by the high temperature solid state reaction method and sol-gel method with barium carbonate, aluminium hydrate and manganese dioxide.

本文以碳酸钡，氢氧化铝，二氧化锰及稀土元素等为原料，通过高温固相和溶胶凝胶两种方法合成绿色荧光粉。

The experimental results show that, by the process, 10 kg barium carbonate with 0.1 L hydrochloric acid (HCl 27%) as catalyst is added in 1 m3 copper electrolyte, 70% Bi can be removed from the electrolyte, and the Bi content in filter residue is more than 4%.

实验结果表明，采用碳酸钡脱铋新工艺， 1 m3铜电解液加入10 kg碳酸钡，用0.1 L盐酸(HCl 27%)作催化剂， Bi的脱除率可达70%，脱铋渣含Bi量大于4%。

The production method and processing conditions of sulfur,sodium hyposulfite, sodium hydrosulfide and thiourea from hydrogen sulfide tail-gas in the production of barium carbonate by carbonation method are introduced.

介绍了利用碳化法生产碳酸钡的硫化氢尾气生产硫磺、硫代硫酸钠、硫氢化钠和硫脲的生产方法和工艺条件，指出硫化氢的综合利用生产工艺简单，产品质量稳定，容易工业化，产品成本低，同时消除了硫化氢尾气对环境的污染，有巨大的经济效益和社会效益，发展前景非常广阔。

The process improvement of flaky sodium hydrosulfide production;2. The production method and processing conditions of sulfur,sodium hyposulfite, sodium hydrosulfide and thiourea from hydrogen sulfide tail-gas in the production of barium carbonate by carbonation method are introduced.

介绍了利用碳化法生产碳酸钡的硫化氢尾气生产硫磺、硫代硫酸钠、硫氢化钠和硫脲的生产方法和工艺条件，指出硫化氢的综合利用生产工艺简单，产品质量稳定，容易工业化，产品成本低，同时消除了硫化氢尾气对环境的污染，有巨大的经济效益和社会效益，发展前景非常广阔。

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％。