GB/T 38346-2019 in English
VALIDSelection and control requirements for key materials used in tantalum capacitors for space application
- Issued on:2019-12-31
- Implemented on:2020-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$233.00
| Standard No: | GB/T 38346-2019 |
| Document status: | VALID |
| Title in English: | Selection and control requirements for key materials used in tantalum capacitors for space application |
| Title in Chinese: | 宇航用钽电容器用关键材料选用与控制要求 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2019-12-31 |
| Implemented on: | 2020-07-01 |
| ICS Classification: | 49.035-Components for aerospace construction |
| Chinese Classification: | V25-Electronic components |
| Professional Classification: | GB-National Standard |
| Related Topics: | The essential
select key material GBT38346 Tantalum capacitor Common key materials |
《GB/T 38346-2019宇航用钽电容器用关键材料选用与控制要求》由TC425（全国宇航技术及其应用标准化技术委员会）归口，TC425SC2（全国宇航技术及其应用标准化技术委员会宇航电子分会）执行，主管部门为国家标准化管理委员会。
Introduction
Technical Background of Tantalum Capacitor Material Standards for Spaceflight
With the rapid development of my country's aerospace industry, the reliability requirements of aerospace electronic equipment for tantalum capacitors are increasing. GB/T 38346-2019, as the first national standard specifically for the control of tantalum capacitor materials for aerospace, systematically regulates the full process requirements from raw material screening to supply chain management for the first time. The standard was compiled by China Zhenhua Group and filled the gap in the basic material standards for aerospace electronic components.
Analysis of Technical Requirements for Key Materials
| Material Category | Core Indicators | Typical Parameters | Test Methods |
|---|---|---|---|
| Tantalum Powder | Gravimetric Specific Capacity/Leakage Current | FTA100K Type ≥100000μF·V/g | GB/T 3137-2007 |
| Tantalum Wire | Purity/Tensile Strength | Ta≥99.95% | GB/T 26012-2010 |
| Silver paste | Square resistance/adhesion | ≤6.0×10-4Ω·cm | GB/T 17473 series |
Typical case: A certain type of solid tantalum capacitor for satellites failed early due to excessive oxygen content in tantalum powder. After testing, it was found that the oxygen content of the FTA500 tantalum powder provided by the supplier reached 5800×10-6, exceeding the standard limit of 3500×10-6. After changing to a qualified supplier in accordance with clause 3.4.2 of this standard, the product failure rate was reduced to 0.1ppm.
Material inspection system architecture
Standard construction of a three-level inspection system:
- Preliminary verification:Check material batches, packaging and quality assurance documents
- Sampling inspection:Implement destructive/non-destructive testing as required in Table 4
- Periodic review:On-site audit of key suppliers every 3 years
Special requirements include: tantalum powder vacuum packaging storage (15-25℃/RH≤70%), silver paste low temperature storage (<0℃), and resin molding material flame retardancy must reach V-0 level.
Key points for implementing supply chain management
| Management links | Control requirements | Record preservation |
|---|---|---|
| Supplier selection | User participation in key material supplier review | Retain for 20 years |
| Status change | Requires review and confirmation by the appraisal agency | Change review record |
| Traceability management | Association between production batch number and material batch number | Full life cycle of product |
Technology evolution trend
Main progress of this standard compared with GJB 360B-2009:
- New standards for new materials such as conductive polymers
- Detailed testing methods for 13 types of materials (such as pH determination of manganese nitrate)
- Establish a two-way traceability mechanism for materials and products
Future revisions need to focus on the standardization of high specific capacitance tantalum powder (>200,000 μF·V/g) and high temperature resistant polymer materials.
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