Standard No.:	QJ 1490-1988
English Name:	Determination Method for Linear Expansion Coefficient of Composite Solid Propellant
Chinese Name:	复合固体推进剂线膨胀系数测定方法
Chinese Classification:	V72    Spacecraft power system
Professional Classification:	QJ    Professional Standard - Aerospace
Issued on:	1988-04-19
Implemented on:	1988-12-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	3000 words
Translation Price(USD):	90.0
Delivery:	via email in 1 business day

QJ 1490-1988 Determination of linear expansion coefficient of composite solid propellant 1 Subject content This standard specifies the determination of linear expansion coefficient of composite solid propellant. 2 Specimen and reference material 2.1 Specimen preparation The propellant block or block for specimen preparation shall be prepared according to QJ 1113 Specimens for performance test of composite solid propellant. 2.2 Specimen specification The specimen specification is shown in Figure 1. The upper and lower end faces of cylindrical specimens shall be kept parallel. Figure 1 2.3 Storage and measurement of specimens The prepared specimens are stored at a relative humidity of less than 50% for later use. The length of specimen is measured with a vernier caliper at room temperature before use, and the reading is accurate to 0.02mm. The specimens with length range exceeding 15±0.20mm are discarded. 2.4 Test reference material

1 Subject content 2 Specimen and reference material 3 Instruments and equipment 4 Test steps 5 Data processing Additional explanation