添加Nd2O3对白云石烧结性能的影响

doi:10.13228/j.boyuan.issn1006-6543.20160148

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Abstract Adding various contents of Nd2O3 into natural dolomite， magnesium-calcium materials were prepared by two-step calcination method， and the influence of Nd2O3 on sintering properties of dolomite was studied. The results show that the bulk density of samples without Nd2O3 is 3.25 g/cm3， the apparent porosity is 3.8%， and the MgO grain size is 3.82 μm when sintered at 1 600 ℃ for 3 h. When 0.75% （mass percent） of Nd2O3 is added， the activation energy of grain growth is decreased due to the solid solution reaction of Nd2O3 with MgO and CaO. The bulk density of the sample increases to 3.33 g/cm3， the apparent porosity decreases to 2.8%， and the MgO grain size increases to 4.53 μm.

Key words： Nd2O3 Calcium magnesium materials Dolomite Activation energy

Received: 21 December 2016 Published: 29 August 2018

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	ZHANG Wang-Nian
	DENG Ning

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ZHANG Wang-Nian,DENG Ning. Effect of Nd2O3 addition on the sintering properties of dolomite[J]. , 2018, 28(04): 42-46.

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http://edit.chinamet.cn/Jweb_fmyjgy/EN/10.13228/j.boyuan.issn1006-6543.20160148 OR http://edit.chinamet.cn/Jweb_fmyjgy/EN/Y2018/V28/I04/42

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