USD $3.00-10.00 / Kilogram
USD $1.00-10.00 / Kilogram
USD $3.00-10.00 / Kilogram
USD $3.00-10.00 / Kilogram
USD $1.00-10.00 / Kilogram
competitive edge:
1. quality: we promise to offer our customers high purity materials which have been approved by gb/t19001-2008 and iso9001:2008 standards. for example, our tellurium 7n is the world first class product. you can rest assure that our priority is to meet and exceed our clients’ demands and expectations.
2. cost: we have lower cost as we are manufacturers which means that we can offer you quality products with competitive prices.
3. hr: we have professional r&d team and complete production line. thus we have large production and stock capacity.
4.distribution network: we have customers from more than 26 countries and areas such as united states, uk, italia,germany, australia, france, india, japan, korea, etc.
our service
1) cost: we have lower cost as we are manufacturer.
2) quality: we have professional r&d team. eg, customer speak highly of our products.
3) shipping: production capacity is large and we have large stock could meet customers delivery requirement at most.
4) payment terms: the payment term could be flexible. we could offer t/t 30 days or 60 days to customer with good credit.
5) service: pre-sales and after sales are ready to answer product questions. 24 hours technical support by e-mail or calling.
material name |
purity |
size |
high purity germanium |
5n-7n |
|
germanium ingot |
5n |
|
germanium powder |
5n |
100,200,325 mesh |
germanium dioxide |
5n-6n |
|
characteristics: |
lustrous, hard, grayish-white solid metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. purified germanium is a 'p-type' semiconductor material. conductivity depends largely on added impurities. attacked by nitric acid and aqua regia, but stable in water, acids, and alkalies in absence of dissolved oxygen, low toxicity. |
applications: |
isolated germanium is mainly used as a semiconductor material for transistors. the first generation of semiconductors were based solely on germanium. however, most of today’s semiconductor production is based on silicon and germaniums use in electronics are in fibre-optic systems, infrared optics and in solar cell applications.. |
2. general properties
symbol: |
ge |
cas: |
7440-56-4 |
atomic number: |
32 |
atomic weight: |
72.59 |
density: |
5.323 gm/cc |
melting point: |
937.4 oc |
boiling point: |
2830 oc |
thermal conductivity: |
0.602 w/cm/k @ 302.93 k |
electrical resistivity: |
microhm-cm @ 20 oc |
electronegativity: |
1.8 paulings |
specific heat: |
0.077 cal/g/k @ 25 oc |
heat of vaporization: |
68 k-cal/gm atom at 2830 oc |
ge% |
99.999min |
ai(ppm) |
0.1max |
cu(ppm) |
0.2max |
fe(ppm) |
0.1max |
pb(ppm) |
0.1max |
ni(ppm) |
0.2max |
co(ppm) |
0.2max |
as(ppm) |
0.1max |
total content of ai, cu, fe, pb, bi,na, si, s,se, as, mg (ppm) |
10max |