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An expert demonstration for purchasing imported X-ray diffractometer

Recently, the City College of Zhejiang University applied for purchasing an imported X-ray diffractometer with a budget of 1.5 million yuan for the scientific research activities of material characterization of the advanced material additive manufacturing innovation research center. The purchase of the equipment has been demonstrated by 5 off campus experts (including 1 legal expert) and publicized.

Details are as follows:

1、 Purchaser name:Zhejiang University City College

2、 Publicity no. of imported products:importedProduct2022061998776336

3、 Name of procurement project:Zhejiang University City CollegeX射线衍射仪设备

4、 Reason for application:

After listening to the equipment investigation and demonstration report of the purchasing unit, the technical review experts agreed that the imported equipment wasX-ray intensity(imported equipment:the focal spot of the optical tube is 0.4 × 12mm, 10million CPS vs domestic equipment:the focal spot of the optical tube is 1 × 10mm, 700000 CPS)Detector type(imported equipment:two-dimensional energy dispersion array detector vs domestic equipment:scintillation crystal counting detector)Analyze software functionality(imported equipment:with the function of quantitative analysis of standard samples and structural refinement vs domestic equipment:without the function of quantitative analysis of standard samples and structural refinement, which requires a lot of manual calculation and analysis) and other aspects involve a number of technical patents, which are irreplaceable for domestic equipment.If domestic equipment is adopted, it can not meet the scientific research needs of advanced materials additive manufacturing innovation research center for material characterization, and the output of experimental results is slow, which seriously limits the publishing speed of scientific research papers.

The legal review experts believe that the purchase of the equipment complies with Article 3 of the measures for the administration of government procurement of imported products (CAI Ku [2007] No. 119) and the confirmation of notice on issues related to the administration of government procurement of imported products (CAI ban Ku [2008] No. 248), and the equipment is not listed in the catalogue of mechanical and electrical products subject to import restrictions and the catalogue of technologies subject to import restrictions in China by the Ministry of Commerce.Therefore, the purchase of the equipment complies with the relevant national laws and regulations on imported products.

5、 Information and opinions of demonstration professionals:

full name

title

Work unit

Liu Bin

professor

Central South University

Liujinlong

researcher

Zhejiang University

Tangyiping

professor

Zhejiang University of Technology

Liushifeng

professor

Xi’an University of architecture and technology

Wuqicai

法学副professor

T&H Law Firm

Liu Bin:Zhejiang University城市学院拟采购的X射线衍射仪主要用于测定金属及非金属材料的晶体结构,织构及应力,是材料分析必备检测设备。目前国际市场上,X射线衍射仪占有率较大的品牌有德国布鲁克、日本理学,国产设备主要有北京普析、丹东通达。国产X射线衍射仪在X-ray intensity、灵敏度及分析软件等方面较进口设备存在较大差距,具体体现在:

1. 进口设备的X射线光管焦斑为0.4×12mm,而国产设备只能做到1×10mm的X射线光管焦斑,精细焦斑的X射线光斑可以获得更高的X-ray intensity。

2. imported equipment adopts two-dimensional energy dispersion array detector, while domestic equipment adopts scintillation crystal counting detector The array detector is the core of the current diffractometer. Using this detector can increase the diffraction intensity by more than 100 and the sensitivity by more than 10 times. It is essential for scientific research.

3. the software of imported equipment has the functions of quantitative analysis of standard samples and structural refinement, and is an indispensable tool for XRD data analysis. The software of domestic equipment has no standard sample quantitative analysis and structure refinement function, which requires a lot of manual calculation and analysis. The output of experimental results is slow and prone to errors, which limits the publishing speed of scientific research papers.

In conclusion, imported equipment can better meet the inspection requirements of the purchasing unit for material analysis, so it is recommended to purchase imported equipment.

Liujinlong:Zhejiang University City College申请购买的X射线衍射仪,主要服务于先进材料增材制造创新研究中心的建设,用于材料成型及机械制造类的科研工作。设备应具备分析材料的物相、结构、残余应力等信息的功能。采购单位在日常科研工作中的一部分样品无法研磨成粉末,因此需要用到微区分析的方法,而微区分析要求设备需配备点光源、XYZ样品台以及定位装置。

At present, only imported equipment has the above devices at the same time, and can realize automatic sampling. The diffractometer equipped with a large area two-dimensional detector can accumulate the diffraction signal intensity by extending the exposure time, so as to obtain the data results that can be used for analysis. At present, only imported diffractometers are equipped with two-dimensional array detectors, which can increase the diffraction intensity and sensitivity by more than 100 times and 10 times respectively. In addition, the angle accuracy of the test data of imported XRD equipment can reach 0.0001 °, while the minimum step accuracy that domestic equipment can achieve at present is only 0.001 °, with a difference of one order of magnitude. Obviously, some performance indexes of domestic instruments fail to meet the requirements and the needs of the purchasing unit. It is recommended to purchase imported equipment for the project.

Tangyiping:Zhejiang University City College申请购买的X射线衍射仪,主要服务于先进材料增材制造创新研究中心的科研工作,此设备应具备材料结构及成分分析的功能,具有精细焦斑的X射线光斑有助于获得更高的X-ray intensity(进口设备焦斑尺寸0.4×12mm,国产设备焦斑尺寸1×10mm);探测器是X射线衍射仪的核心部件,进口设备探测器为二维能量色散阵列探测器,而国产设备采用闪烁晶体计数探测器,二者相比计数强度相差甚远(进口设备1000万cps,国产设备70万cps);进口设备的最小步长及角度重现性均优于国产的(进口0.0001度,国产0.001度)。因此,进口品牌在X射线光管焦斑尺寸、计数强度及精度等方面较国产设备存在巨大优势,国产设备计数强度低,不能进行微量成分信息的获取及精细结构的分析,建议采购进口设备。

Liushifeng:X-ray diffractometer (XRD) is an important equipment for measuring the crystal structure, texture and stress of metal and non-metal materials. It is also a necessary equipment for phase identification and internal stress detection of metal 3D printing materials in additive manufacturing center. At present, the focal spot of X-ray tube of domestic equipment can only reach 1 × 10mm, the focal spot intensity is very low, and the scintillation crystal counting detector is used; In contrast, the focal spot of imported equipment can reach 0.4 × 12mm, using two-dimensional energy dispersion array detector, the diffraction intensity is 100 times that of domestic equipment, and the sensitivity is 10 times that of domestic equipment. In addition, the software of imported equipment has standard sample quantitative analysis and structure refinement software, which can improve the identification accuracy and is a necessary means to study trace components, while the domestic equipment does not have this function at present. Therefore, it is recommended to purchase imported equipment.

Wuqicai:(一)Zhejiang University City College拟采购的进口产品符合《政府采购进口产品管理办法》(财库[2007] 119号)第三条以及《关于政府采购进口产品管理有关问题的通知》(财办库[2008] 248号)二、三的认定情形;(二) 该商品未列入商务部《限制进口机电产品目录》和《中国禁止进口限制进口技术目录》;(三) 通过市场调查,国产设备目前在X射线衍射强度、灵敏度以及分析软件性能指标达不到要求,不满足采购单位需要。该设备属于国家非限制进口仪器设备,符合国家相关进口产品的法律规定,建议该项目采购进口设备。

[recommendations of relevant meetings]

In order to promote relevant personnel to deeply understand the development status of X-ray diffraction technology and master relevant application knowledge, the instrument information network will organize and hold a network conference on”X-ray diffraction technology and application progress” on July 15, 2022, and invite senior technical experts in the industry to focus on the theory and analysis methods of X-ray diffraction frontier technology, as well as hot application fields such as material science and drug research and development to share reports.

Participation method (both mobile phones and computers can listen):

1. Free registration on the official website(registration link)

2. You will receive the SMS notification after passing the review;

3. On the day of the meeting, click the SMS link and enter the registration mobile number to listen.