Tungsten(IV) sulfide, 99.9% trace metals basis

评测依据

• review_count：150
• rating_avg：4.8
• brand_reputation：0
• merchant_count：0
• price_range：[800,1999]
• dimension：best_value
• sources：["京东","Sigma-Aldrich官网"]
• time_range：{"from":"2026-06-26 04:35:21","to":"2026-06-26 04:35:21"}
• intros：{"brand_intro":"Sigma-Aldrich是默克集团旗下全球领先的科研化学品与催化剂品牌，拥有百年历史。产品以超高纯度、严格的质量控制（如ISO 9001、ISO 17025）著称，广泛应用于顶级科研机构与制药企业。其硫化钨催化剂是行业标杆，常被用作标准参考材料。","product_intro":"该产品为高纯硫化钨(IV)催化剂，纯度达99.9% trace metals basis，杂质含量极低。适用于高精度催化研究，如单晶催化、表面科学及电催化。产品为黑色粉末，惰性气体填充包装，确保长期储存稳定性。每批次附带COA分析证书。","key_specs":["纯度：≥99.9% trace metals basis","粒径：D50 ≤ 2 μm","比表面积：≥ 25 m²/g","包装规格：25G / 100G","储存条件：室温、密封、惰性气体保护"]}
• alt_products：[{"product_name":"Tungsten(IV) sulfide, 99.9% trace metals basis","brand":"Sigma-Aldrich","model":"243639-25G","price":1280}]
• kol_quotes：["Sigma的硫化钨是我做单晶催化实验的唯一选择，杂质控制无可挑剔。","虽然贵，但数据可靠性值得这个价。"]
• scoring_breakdown：[{"source":"word_of_mouth","score":93.5,"weight":0.15,"confidence":0.8,"details":{"source":"word_of_mouth_scores","summary":"用户评价其纯度极高，适合做高精度催化机理研究。多位教授级用户反馈其杂质峰在XRD和XPS中几乎不可见，是发表高水平论文的可靠选择。缺点是价格较高，且国内库存较少，需提前预订。整体口碑极佳，复购率高达80%。","source_count":2}},{"source":"objective","score":84.31499165971644,"weight":0.6,"confidence":0.5,"details":{"rating_avg":4.8,"price":1280,"wom_score":93.5}},{"source":"user_review","score":96,"weight":0.15,"confidence":1,"details":{"rating_avg":4.8,"review_count":150,"source":"product_reviews_aggregate"}},{"source":"expert","score":82,"weight":0.1,"confidence":0.6,"details":{"kol_count":2,"scored_count":2,"sample":["Sigma的硫化钨是我做单晶催化实验的唯一选择，杂质控制无可挑剔。","虽然贵，但数据可靠性值得这个价。"]}}]
• method_version：v3
• search_visual：null