No cheating. Jiangsu Guoca Hongyuan Optoelectronics Technology Co., Ltd. was established in June 2010. It adheres to the principle of not deceiving consumers, high quality and high service and has won people's hearts. It is a provincial high-tech enterprise. Jiangsu Guoca Hongyuan Optoelectronics Technology Co., Ltd. engages in the research and development, production and sales of solar conductive silver paste and aluminum paste.
When manufacturing monocrystalline silicon solar cells, is the silver paste used in the printing process harmful to the human body?
The conductive paste d Silver is divided into two categories: ①Polymer silver conductive paste (Drying or hardening to form a film, using an organic polymer as the bonding phase; ② Sintered silver conductive paste (sintered to form a film, sintering temperature > 500°C, glass powder or oxide comme binding phase). Silver powder is classified based on particle size. The average particle size <0.1 μm (100 nm) is nano-sized silver powder; 0.1 μm < Dav (average particle size) 10.0 μm is a coarse silver powder. The three categories of silver conductive pastes require different types of silver powder or combinations as conductive fillers, and even different formulations in each category require different silver powders as conductive functional materials. The goal is to use the smallest quantity of silver powder in a specific formula. or film forming process The use of silver powder to maximize the electrical and thermal conductivity of silver is linked to optimizing film performance and cost.
Silver conductive glue is generally considered the main glue. It combines conductive particles together thanks to the effectbonding of the matrix resin to form a conductive path and achieve a conductive connection of the bonded materials.
Since the base resin of silver conductive glue is an adhesive, you can choose a suitable curing temperature for bonding. For example, epoxy resin adhesive can be cured at room temperature up to 150°C, which is much lower. than that of tin. The lead solder temperature is above 200°C, which prevents material deformation, thermal damage to electronic devices and the formation of internal stress that can be caused by high solder temperatures. miniaturization and miniaturization of electronic components and high temperature of printed circuit boards, With the rapid development of density and strong integration, the minimum pitch of 0.65mm for lead-tin solder is far from meeting the actual needs of conductive connectionssilver. can be processed into mud to achieve high line resolution. He is also a driver. Silver glue has a simple process and is easy to use, which can improve production efficiency and avoid environmental pollution caused by heavy metal lead in tin-lead solder. Silver glue is an ideal choice for replacing lead-tin solder to achieve conductive connections.
Are solar conductive silver paste and aluminum paste considered dangerous goods during transportation? If yes, what categories are these?
Silver Paste
Silver paste is a mechanical mixture of high purity (99.9%) metallic silver particles, adhesives, solvents and thick additives.
Note that these are “metallic silver particles” and not “mercury (mercury)”.
Mercury is a liquid metal, while silver particles aremetal are solid and relatively less harmful.
However, please note that in addition to metallic silver particles, silver paste also requires the preparation of "adhesives, solvents and additives".
The "adhesive" is mainly resin, which is non-toxic in itself, but the resin added additives are slightly toxic.
The "solvents" generally use butyl anhydride acetate, diethylene glycol butyl ether acetate, diethylene glycol ether acetate, isophorone, etc. . These have some toxicity and have been certified by the state standard, professional consultation is required. .
“Helps” are antioxidants, stabilizers, etc., which are mildly toxic.
Generally speaking, silver paste is a chemical product. Needless to say, as long as it is a chemical, it is definitely toxic.
However, chemical productsOrdinary products, if properly protected during production operations, are less harmful to the human body. But it is difficult to say whether labor protection in the factory is not standardized.
The solar photovoltaic industry is a very polluting industry (please distinguish the difference between "solar energy", a green energy, and "the photovoltaic industry"), so as it is Cell processing and production, contact with pollutants and toxic substances are inevitable Less, especially for single crystal and polycrystalline refining and other work.
Necessary protection is therefore necessary.
Aluminium-silver paste is not a dangerous product. Characteristics and uses Aluminum-silver paste is not easy to catch fire and explode. Coverage, shine, trigger performance, metallic properties and softness are the requirements.Techniques for identifying aluminum-silver paste patterns are classified based on particle size. Usage: Widely used in plastic paint, hardware and household appliance paint, motorcycle paint, bicycle paint, etc. According to the list of hazardous chemicals, aluminum-silver paste belongs to category 33646: paints, auxiliary materials and coatings containing secondary flammable solvents. However, due to international and domestic environmental protection and chemical safety requirements in recent years, domestic manufacturers have changed their processes and no longer use secondary flammable solvents as carriers, but instead use safe and environmentally friendly solvents with higher flash points. The aluminum-silver paste produced no longer belongs to the category of goodsdangerous in terms of actual chemical properties. Aluminum powder is a dangerous good. Chinese name: Aluminum powder. English name: Aluminumppowder Alias: Aluminum silver powder. CAS No: 7429-90-5. Molecular formula: Al. 26.97. It belongs to dangerous goods class 4, category 1. The number is 1309.