Article(id=1314907234375656170, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1314907112854089785, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2025.06.024, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1750780800000, receivedDateStr=2025-06-25, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1791427914470, onlineDateStr=2026-10-08, pubDate=null, pubDateStr=null, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1791427914470, onlineIssueDateStr=2026-10-08, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1791427914470, creator=13701087609, updateTime=1791427914470, updator=13701087609, issue=Issue{id=1314907112854089785, tenantId=1146029695717560320, journalId=1235980550691926019, year='2025', volume='45', issue='6', pageStart='1', pageEnd='228', issueExtLink='null', onlineDate='null', pubDate='1764518400000', pubDateStr='2025-12-01', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1791427885497, creator='13701087609', updateTime=1791430521754, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1314918170201252492, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1314907112854089785, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1314918170201252493, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1314907112854089785, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=134, endPage=139, ext={EN=ArticleExt(id=1314907234618925803, articleId=1314907234375656170, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Thermodynamic Analysis of Iron Phosphate Synthesis and Dehydration Reactions, columnId=1236276106727321817, journalTitle=Mining and Metallurgical Engineering, columnName=METALLURGY, runingTitle=null, highlight=null, articleAbstract=

Iron phosphate dihydrate (FePO₄·2H₂O) is usually synthesized via three technical routes, including ammonium process, sodium process and iron process. A systematical evaluation of its thermodynamic properties is presented, which can reveal the phase transition behavior of iron phosphate dihydrate during the dehydration process, and provide a theoretical basis for selection of technical route for industrial synthesis. The enthalpy change (ΔH), entropy change (ΔS), Gibbs free energy change (ΔG), and logarithm of the reaction equilibrium constant (lgK）of the core reaction of those three processes are calculated by using HSC Chemistry 6.0 software, and the thermodynamic data of dehydration process are verified by performing a thermogravimetry-differential scanning calorimetry (TG-DSC) experiment. The results show that the synthesis by sodium process has the lowest ΔG and the highest lgK, indicating its thermodynamic spontaneity and reaction rate are optimum, followed by the ammonium process, while the iron process presents the worst performance. The TG-DSC experiment results show that the dehydration process of iron phosphate dihydrate is exothermic at 709.9 ℃, corresponding to the transformation of FePO₄ from α-quartz phase to β-quartz phase. Featuring high spontaneity and rapid reaction, the sodium process is considered as a industrial synthesis with thermodynamic advantage.

, authors=Cunpeng QIN¹, Zhenshuan SHI¹, Minglu RAO¹, Bing WANG¹, Xiang REN¹, Ruokui CHEN¹, Dingshan RUAN¹, Hao WANG^{2, 3}, authorsList=Cunpeng QIN, Zhenshuan SHI, Minglu RAO, Bing WANG, Xiang REN, Ruokui CHEN, Dingshan RUAN, Hao WANG, authorCompany=null, correspAuthors=Dingshan RUAN, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314907234988024556, articleId=1314907234375656170, tenantId=1146029695717560320, journalId=1235980550691926019, language=CN, title=磷酸铁合成及脱水反应的热力学分析, columnId=1236276107322913000, journalTitle=矿冶工程杂志, columnName=冶金, runingTitle=null, highlight=null, articleAbstract=

系统评估了铵法、钠法和铁法合成二水磷酸铁（FePO₄·2H₂O）的热力学特性，揭示了其脱水过程的相变行为，为选择合适工业合成路线提供理论依据。采用HSC Chemistry 6.0软件计算3种工艺核心反应的焓变（ΔH）、熵变（ΔS）、吉布斯自由能变（ΔG）及反应平衡常数对数（lgK），结合热重-差示扫描量热（TD-DSC）实验验证脱水过程热力学数据。结果表明，钠法合成反应的ΔG最低、lgK最高，表明其热力学自发性和反应速率最优，铵法次之，铁法表现最差；TG-DSC结果显示，二水磷酸铁脱水时在709.9 ℃发生放热，对应FePO₄从α石英型结构向β石英型结构的晶型转变。钠法兼具高自发性与快速反应特性，是具有热力学优势的工业合成方法。

, authors=秦存鹏¹, 时振栓¹, 饶明璐¹, 王冰¹, 任翔¹, 陈若葵¹, 阮丁山¹, 王皓^{2, 3}, authorsList=秦存鹏, 时振栓, 饶明璐, 王冰, 任翔, 陈若葵, 阮丁山, 王皓, authorCompany=null, correspAuthors=阮丁山, authorNote=, correspAuthorsNote=, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=xcgZOrybKQ6MY7K93Od8Pw==, magXml=LFp9B2s7Rt6Z3zUDV6WTLA==, pdfUrl=null, pdf=LSES+yMf69t+CY0niGENCA==, pdfFileSize=580076, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=oF3H7LgE5C4YytL/l5eiLQ==, mapNumber=null, fund=null)}, authors=[Author(id=1314907238574154487, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1314907234375656170, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=qincunpeng@brunp.com.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1314907238913893113, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1314907234375656170, authorId=1314907238574154487, language=EN, stringName=Cunpeng QIN, firstName=Cunpeng, middleName=null, lastName=QIN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1.Guangdong Brunp Recycling Technology Co., Ltd., Foshan 528100, Guangdong, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1314907238989390586, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1314907234375656170, authorId=1314907238574154487, language=CN, stringName=秦存鹏, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1．广东邦普循环科技有限公司，广东 佛山 528100, bio={"content":"

秦存鹏（1992—），男，山东枣庄人，硕士，工程师，研究方向为锂离子电池正极材料研发及产业化。E-mail: qincunpeng@brunp.com.cn

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秦存鹏（1992—），男，山东枣庄人，硕士，工程师，研究方向为锂离子电池正极材料研发及产业化。E-mail: qincunpeng@brunp.com.cn

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