查询词典 niobic

The experimental results indicated that niobic acid had a better catalysis performance and stability.

试验结果表明，铌酸对催化油酸和甲醇的酯化反应具有较好的活性和稳定性。

The structures,physicochemical properties and catalytic applications of niobic acid and niobium oxide are reviewed in this paper.

介绍了铌酸-氧化铌的结构、性质及其在多相催化反应中的研究现状及应用前景。

Treatment of niobic acid with nitric acid and phosphoric acid affected the catalytic activity in synthesis of methyl oleate from oleic acid and the methyl alcohol.

研究了处理的铌酸对制备油酸甲酯催化反应活性的影响，并对此酯化反应合成条件进行了考察。

The results indicate that in Er3+-doped niobic tellurite glasses, proper amount of B2O3 can be used as a mo-difier to improve thermal stability and spectroscopic properties of Er3+ ions.

结果表明，在掺铒碲铌玻璃中，适量的B2O3能较好地提高玻璃的热稳定性能和Er3+离子的光谱性质。

BET, acid amount and distribution of acidity of niobic acid catalysts were investigated.

测定了固体铌酸催化剂的比表面积、表面酸强度及表面酸量。

The result showed the niobic acid has high catalytic activity and stability when it is used as solid acid catalyst and support, and it can be used more widely.

结果表明，无论是作为固体酸催化剂还是作为载体，铌酸都表现出较高的催化活性和稳定性，具有良好的应用前景。

The structure and surface acidity of the niobic acids were analyzed by XRD, BET and TG/DTG.

用XRD、BET和TG/DTG对铌酸的结构特征和表面酸强度进行了分析。

A series of niobic acids at different calcination temperatures was prepared.

在不同焙烧温度下制备了一系列固体铌酸催化剂。

The results showed that the niobic acid treated with the other acid had obvious crystal structure and higher surface acid strength.

结果表明，经酸处理的铌酸具有明显的晶体结构，其表面酸强度依次为：经硝酸及磷酸处理的铌酸＞硝酸处理的铌酸＞水洗的铌酸。

Niobic acid and compounds containing niobium are applied in a wide range of catalysis fields for their unique acidic property and thermal stability.

铌酸和含铌化合物独特酸性和热稳定性，广泛的应用催化领域中。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。