Alumina Ceramic Insulator Tube Four Holes Al2O3 Wire Protective Pipe

Product Description

Product Description

Alumina Ceramic Insulation Core

This insulation core is made of high purity 99 percent alumina ceramic material. It is formed and high temperature sintered to achieve multi bore inner channels. Precision finishing guarantees consistent inner hole dimension and smooth surface. Zero water absorption ensures dense internal structure.

Tapered Alumina Ceramic Tube

For 99 percent alumina grade, bulk density reaches 3.75 g/cm3. Vickers hardness is 1800 HV, flexural strength above 330 MPa. Dielectric strength can reach 20 KV per mm. It can sustain long term working temperature up to 1600 centigrade, with good resistance against oxidation and chemical corrosion.
 
These performance indexes bring practical value for your assembly. High dielectric strength delivers reliable electrical isolation and effectively reduces electric breakdown risk for heating elements. High mechanical hardness improves wear resistance and extends service life of heating assemblies. Stable high temperature performance keeps dimension unchanged under continuous heat cycles and lowers equipment failure rate. Uniform multi bore inner holes ensure stable placement for heating wires, supporting consistent product output. Low porosity prevents contamination and maintains clean working condition.
 
This multi hole alumina ceramic core is widely used as insulation carrier for heating elements, electronic heater parts, sensor assemblies and industrial heating devices. Custom outer diameter, bore quantity and overall length are acceptable according to customer drawings.

Al2O3 Ceramic Pipe Tubing

Every item will pass dimension measurement and appearance inspection before shipment. Sample order is supported for performance verification.

FAQ

Q1: Can you adjust bore quantity and dimension for this ceramic core

A1: Yes, we can custom outer size, inner bore count and bore diameter based on your technical drawings.

Q2: What is the standard machining tolerance

A2: Standard tolerance is plus minus 0.05 mm. Tighter tolerance can be negotiated for special application.

Q3: What purity grades are available

A3: We supply 92 percent,95 percent and 99 percent alumina options to match different budget and working requirements.

Alumina Ceramic
Alumina Purity	92%	95%	96%	99%	99.6%
Color	White	White	White	Ivory White	White
Volumedensity(g/cm3)	3.45	3.5	3.7	3.75	3.9
Water Absorption	0	0	0	0	0
Flexural Strength	300Mpa	300Mpa	320Mpa	330Mpa	330Mpa
Vickers hardness	1300	1400	1400	1800	1800
Dielectric Constant (at 1MHZ 25℃)	10	10	10	10	10
Modulus of elasticity	350Gpa	350Gpa	350Gpa	370Gpa	370Gpa
thermal conductivity (30℃)	18W/M.K	24W/M.K	24W/M.K	25W/M.K	28W/M.K
Volume resistivity	10^14Ω•cm	10^14Ω•cm	10^14Ω•cm	10^14Ω•cm	10^15Ω•cm
Dielectric strength	20KV/mm	20KV/mm	20KV/mm	20KV/mm	30KV/mm

You May Like

Strict Quality System & Digital Certification

Strict Full-process QC & Complete Verified Certifications

We adopt standardized ISO 9001:2015 and IATF 16949 quality management systems with full-process inspection from raw materials incoming, production processing to finished product delivery. We have obtained a full range of international certifications including RoHS, CE, EMC, LVD, FDA, MSDS, SGS and TUV, and own 8 registered trademarks and 40 technical patents as our core intellectual property.

ISO9001:2015 Quality Management System

CE Certification — European Safety Standard

RoHS Certification — EU Restriction of Hazardous Substances Standard

Period of validity:
from2024.10.17 to 2027.10.25
Full-process standardized production quality control system.

Certificate No. CTA-01-2005-008
 (Original certificate available)
Complies with EU mandatory safety, health and environmental protection standards.

Certificate No. LTR20260427010
Date:MAY .08.2026

Packaging & Shipping

Reliable Fragile Product Packaging & Comprehensive Shipping Protection

Targeting the fragile, high-precision characteristics of industrial ceramic and quartz products, we adopt standardized export-grade shockproof packaging and professional global transportation solutions. Finished products go through independent wrapping, anti-collision foam filling and thickened carton or wooden box reinforcement, greatly reducing the risk of breakage, scratch and deformation during transit. We support customized brand packaging, exclusive shipping marks and standardized export packaging standards, and adapt to multiple transportation modes including sea freight, air freight and international express. With mature logistics docking experience and full-link cargo protection measures, we aim to improve the safety and integrity of product delivery for global industrial customers.

R&D Strength & Mature Project Experience

Independent R&D Innovation + Verified Similar Overseas Project Cases

We have independent professional R&D teams and laboratories capable of continuous innovation, structural optimization and process improvement, to develop customized products tailored to international market needs. Our products are exported to more than 130 countries, and we have established cooperative partnerships with over 100 well-known domestic and foreign universities. We have also maintained successful cooperation with Fortune 500 enterprises.
We boast extensive overseas project experience and have long provided services to worldwide clients covering similar target markets, customer groups and product specifications. Our well-established, replicable project cases comply with major international standards.

Stable Capacity & Fair Pricing

Sufficient & Stable Output Capacity + Standardized              Market-oriented Quotation

Equipped with modern standardized workshops and automatic production equipment, we maintain stable daily, monthly and annual output, capable of handling large-batch, continuous and urgent global orders. We offer transparent, standardized and efficient quotations aligned with prevailing average global market prices. Factory direct sales deliver favorable cost performance with regulated pricing, facilitating long-term stable cooperation on bulk orders.

Full-Cycle Service & Long-Term Trusted Partner

One-stop Full-lifecycle Export Service + Sustainable & Stable Enterprise Operation

As an established, stable export manufacturer with comprehensive enterprise qualifications and worldwide market recognition, we are not makeshift processing workshops and able to deliver sustainable, steady product supply and technical support. We offer one-stop full-lifecycle export services covering pre-sales customization, order progress tracking and professional after-sales maintenance and warranty. Our responsive multilingual service team strives to deliver seamless cooperation with clients.

FAQ

Q1: Can you provide exclusive customized solutions for special project demands? 
A1: Yes. In addition to conventional OEM and ODM customization, we can develop exclusive product structures, adjust technical parameters and optimize solutions according to special project standards, regional industry specifications and personalized buyer requirements, providing one-to-one customized technical support.

Q2: Do you support third-party factory inspection and product random testing? 
A2: We support on-site factory audit and offline random inspection by buyers or authoritative third-party institutions. Our standardized production process, complete quality records and standardized management system can comply with mainstream international factory inspection standards.
 
Q3: How do you ensure on-time delivery for bulk orders? 
A3: We have a scientific production scheduling system and sufficient material reserve chain. According to order quantity and delivery cycle, we will formulate a detailed production plan, arrange special personnel to track progress in real time, and effectively avoid delivery delays to ensure stable and punctual shipment of bulk and urgent orders.

Q4: Why is your factory price more stable than trading companies? 
A4: As a direct manufacturer, we control all links from raw material procurement, production processing to finished product output. There is no intermediate markup, and we can adjust costs according to long-term cooperative orders, maintaining stable and transparent pricing for long-term strategic partners.

Q5: What customized service items can you support besides product structure? 
A5: Besides structural size and precision tolerance customization of industrial ceramic and quartz products, we support personalized services including custom deep processing, surface treatment, laser marking, custom packaging and technical document customization to meet different industrial and brand standards.