Industrial Electrical Resistivity Flanged Alumina Ceramic Bushing
Insulator
Specification of the ceramic bushing insulator
1. Material available: different purity alumina (from 95% to
99.8%), zirconia, Silicon carbide, steatite
2. Forming methods: Dry pressed, Hot pressed, Ceramic Injection
molding, ISO pressed and so on
3. Dimension capability: Min. the inner diameter can be 1mm, Max.
the outer diameter can be 800mm
4. Tolerance: outer diameter can be 0.005mm, the inner diameter can
be 0.01mm, the overall length can be 0.01mm
5. Surface treatment: External and internal surface to be polished,
glazed or metallized
6. Secondary processing: CNC machining, lapping, grinding,
precision cutting and so on
The accuracy achieved after precision machining
(1) Axis: roundness 0.002 mm, concentricity 0.002 mm, smoothness
Ra0.1;
(2) Hole: the minimum processing hole diameter is 0.2 mm and the
depth is up to 6 mm (depending on the material);
(3) Slot: min. value to be 0.1 mm of narrow groove, and grooves
with custom shapes;
(4) Plane: 0.1mm sheet with minimum processable thickness,
parallelism 0.001mm, measurement tolerance 0.001 mm, finish Ra0.1;
(5) Thread: The minimum machinable M2 internal thread, the accuracy
of GB-7h, the external thread size is not limited, the accuracy is
GB-6g.
Main characteristics of the ceramic bushing insulator
1. They offer different grade dimensional accuracy per sintered
only, precision machining
2. They are more cost-effective ceramic parts with equivalent
performance among all other technical ceramics
3.. High hardness, it is can be up to 1700 HV, and Super compressive strength up to 2240 Mpa
3. High heat resistance: Alumina ceramic parts offer excellent
thermal stability, which means that it is widely used in areas
where resistance to high temperatures is essential.
4. Good wear resistance: it is an ideal choice to wear parts in
high abrasive industry
5. High electrical resistivity: used in all-electric products,
electric heating products, and wear-resistant machinery parts.
6. High corrosion resistance: It is insoluble in water and only
slightly soluble in strong acid and alkaline solutions. Good
chemical stability of alumina leads to high corrosion resistance.
7. We support a variety of customized alumina ceramic parts base on
customer's drawing, sample, or reference parameters
Description of ceramic bushing insulator
Our industry alumina ceramic parts include tube, sleeve, rod,
plate, disc, wafer, ring, shaft, valves, pump plunger, beam,
roller, screw, washer, hunger, spacer, holder, carrier, insulator,
fixture, clamp, chuck, nozzle, guide, frame, lining, and beads
besides flanged ceramic bushing insulator for electrical industry.
These precision toleranced ceramic components or assemblies are
used in a wide range of semiconductor, electronic, electrical,
mechanical, chemical, automotive, textile and the other industrial
engineering applications, due to their extreme hardness, more
resistances to wear, heat, corrosion, high electric insulation, and
low thermal expansion.
From life-extending elements to next-generation, renewable energy
products, our factory genuinely helps make the world measurably
better. We work with engineers and designers like you to develop
tomorrow’s technology and art for just what you search for in the
global economy.
Using our core strengths of custom-engineering & designing,
material expertise, operational excellence, and rapid execution. We
help our customers develop amazing solutions about technical
ceramics.
Application of alumina ceramic parts:
Alumina ceramic parts are widely used in the electronic,
electrical, machinery, chemistry, ceramic seal, mineral, new energy, military, aerospace, almost all modern industries.
Datasheet of technical ceramic materials
| Property | Units | Materials |
| 99.5%Al2O3 | 99%Al2O3 | 95%Al2O3 | ZrO2 | Si3N4 |
| Density | g/cm3 | ≥3.85 | ≥3.80 | ≥3.60 | ≥6.0 | ≥3.2 |
| Water absorption | % | 0 | 0 | 0 | 0 | 0 |
| Hardness | HV | 1700 | 1700 | 1500 | 1300 | 1550 |
| Flexural strength | Mpa | ≥379 | ≥338 | ≥320 | ≥1200 | ≥600 |
| Compressive strength | Mpa | ≥2240 | ≥2240 | ≥2000 | ≥1990 | ≥2500 |
| Fracture toughness | Mpa m1/2 | 4-5 | 4-5 | 3-4 | 6.5-8 | 6 |
Max. service temperature (Non-loading) | ℃ | 1675 | 1600 | 1500 | 1000 | 1200 |
| CTE (20-800℃) | 1×10 -6 /℃ | 6.5~8.0 | 6.2~8.0 | 5.0~8.0 | 8.0~9.5 | 3.1 |
| Thermal shock | T(℃) | ≥250 | ≥200 | ≥220 | ≥300 | ≤1000 |
| Thermal conductivity(25℃) | W/m.k | 30 | 29 | 24 | 3 | 15~20 |
| Volume resistivity (25℃ ) | ohm.cm | ＞1 x 10 14 | ＞1 x 10 14 | ＞1 x 10 14 | ＞1 x 10 11 | ＞1 x 10 12 |
| Insulation strength | KV/mm | 19 | 18 | 18 | 17 | |
| Dielectric constant(1Mhz) | (E) | 9.7 | 9.5 | 9.5 | 29 | |
Packaging proposal and transportation solutions
1. We will keep the ceramic parts inside the inner package to be
fixed without moving, then it will prevent them from collision each
other, to avoid any cause any chippings during transportation.
2. In addition, the inside of the outer carton will be filled with
sufficient protective kinds of stuff.
Why choose us?
★ 10+ Years of manufacturing experience in OEM, ODM ★ Powerful R&D,
mass production capability
★ In-house comprehensive manufacturing types of equipment ★
Rigorous quality control system and processes
★ Surpassing pre-sales and after-sales service ★ Abide all orders
as the first priority
FAQs (Frequently Asked Questions)
Q1. Are you a factory or trading company?
A: We are a manufacturer. You are welcome to visit our factory.
Q2: Do you send a sample to check?
A: Sure, the sample is free and freight collect.
Q3: When will you ship it?
A: If the products are in storage, we'll ship within 48 hours
Q4: When can I get the price?
A: We regularly quote within 24 hours after we get your inquiry. If
you are in urgent need of getting the price.
Please call us or tell us in your email so that we will proceed
with your inquiry as a priority.
Q5: Is it available to provide customized products?
A: We always support custom-made demand as per different materials,
dimensions, and designs.
Q6: How to ensure quality?
A: The dimension out of any batch will be carried out sampling
inspection per international AQL standard. A 100% cosmetic
inspection will be done.
Q7: What other products are you dealing with?
A: We focus on a variety of ceramic tubes, ceramic substrates,
ceramic sheets, textile ceramics besides metalized ceramics.
