Study on preparation and thermal properties of carbonates composite heat storage materials

SANG Lixia; LI Feng

doi:10.11949/j.issn.0438-1157.20180748

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Study on preparation and thermal properties of carbonates composite heat storage materials

更新时间：2025-12-10

- Study on preparation and thermal properties of carbonates composite heat storage materials
- CIESC Journal Issue S1, Pages: 129-135(2018)
- 作者机构：
  
  北京工业大学环境与能源工程学院, 传热强化与过程节能教育部重点实验室及传热与能源利用北京市重点实验室,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180748
  CLC： K512
- Online First：30 September 2018，
  
  Published：30 September 2018
- 稿件说明：
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SANG Lixia, LI Feng. Study on preparation and thermal properties of carbonates composite heat storage materials[J]. CIESC Journal, 2018, (S1): 129-135.
DOI：

SANG Lixia, LI Feng. Study on preparation and thermal properties of carbonates composite heat storage materials[J]. CIESC Journal, 2018, (S1): 129-135. DOI： 10.11949/j.issn.0438-1157.20180748.

摘要

以二元碳酸盐（Li2CO3-K2CO3，BC，62：38，摩尔比）和三元碳酸盐（K2CO3-Li2CO3-Na2CO3，TC，1：2：1，摩尔比）为相变材料，以氧化镁为基体材料，通过混合烧结法制备陶瓷基复合蓄热材料。二元碳酸盐复合材料（BCC）和三元碳酸盐复合材料（TCC）的熔点与相应混合碳酸盐的熔点相近，分别为465.1℃和386.4℃，并在其最高使用温度（800℃）范围内维持较高的比热容；且复合材料的潜热值均大于150.0 J/g。基于XRD和SEM的表征分析，两种复合蓄热材料具有较好的化学稳定性，且基体材料能很好地混合支撑相变材料。两种复合材料分别进行50次热循环，其热物性参数没有发生明显变化，具有较好的热循环稳定性。

Abstract

Ceramic composite heat storage materials were prepared by mixed sintering method with binary carbonates (Li2CO3-K2CO3

62:38

mole ratio) and ternary carbonates (K2CO3-Li2CO3-Na2CO3

1:2:1

mole ratio) as phase change materials

and with magnesium oxide as the matrix material. The melting point of binary and ternary carbonates composites (BCC

TCC) are 465.1℃ and 386.4℃ respectively

which is similar to the corresponding mixed carbonates. Composite heat storage materials maintain a high specific heat value within the highest using temperature (800℃)

and the latent heat is more than 150 J/g. Based on the characterization analysis of XRD and SEM

two kinds of composite heat storage materials have good chemical stability

and the matrix material can well support the phase change material. The thermal properties of the composite heat storage materials don't change significantly and have good thermal cycling stability after 50 thermal cycles.

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